MCP131X [MICROCHIP]
Voltage Supervisor; 电压监控器型号: | MCP131X |
厂家: | MICROCHIP |
描述: | Voltage Supervisor |
文件: | 总44页 (文件大小:1235K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
MCP131X/2X
Voltage Supervisor
Features
Package Types
SOT-23-5
• Low supply current: 1 μA (typ.), 10 μA (max.)
• Precision monitoring trip point options:
- 2.9V and 4.6V (Standard Offerings)
MCP1316/16M/20
MCP1317
VDD
WDI
RST
VSS
RST
1
5
1
2
3
VDD
WDI
5
- 2.0V to 4.7V in 100 mV increments,
(Contact the local Microchip Sales Office)
VSS
MR
2
3
4
MR
4
• Resets microcontroller in a power-loss event
• Reset Delay Time Out Option:
MCP1318/18M/21
MCP1319/19M/22
- 1.4 ms, 30 ms, 200 ms, or 1.6s (typ.)
• Watchdog Timer Input Time Out Options:
- 6.3 ms, 102 ms, 1.6s or 25.6s (typ.)
• Manual Reset (MR) input (active-low)
• Single and complementary Reset output(s)
• Reset Output Options:
VDD
VDD
RST
VSS
1
2
3
5
RST
VSS
1
2
3
5
RST
4
4
RST
MR
WDI
- Push-Pull (active-high or active-low)
- Open-Drain (internal or external Pull-up)
• Temperature Range: -40°C to +125°C
• Voltage Range: 1.0V to 5.5V
Block Diagram
VDD
Comparator
+
–
• Lead Free Packaging
RST
RST
Output
Driver
Description
Reference
Voltage
The MCP1316/16M/17/18/18M/19/19M/20/21/22 are
voltage supervisor devices designed to keep a micro-
controller in Reset until the system voltage has reached
and stabilized at the proper level for reliable system
operation. This sevice family also offers a Watchdog
Timer to monitor system operation and a Manual Reset
input. The table below shows the available features for
these devices.
MR
Noise Filter
Watchdog
VSS
WDI
Note: Features available depend on the device
Device Features
Reset Output A
Device
Reset Output B
WDI Input
MR Input
Pull-up
Active
Pull-up
Active
Type
Type
Resistor Level
Resistor Level
MCP1316
MCP1316M
MCP1317
MCP1318
MCP1318M
MCP1319
MCP1319M
MCP1320
MCP1321
MCP1322
Push-Pull
—
Low
Low
High
Low
Low
Low
Low
Low
Low
Low
—
—
—
—
—
—
—
—
—
—
—
—
Yes
Yes
Yes
Yes
Yes
No
Yes
Yes
Yes
No
Open-Drain
Push-Pull
Internal
—
—
—
—
—
Push-Pull
—
Push-Pull
Push-Pull
Push-Pull
Push-Pull
—
High
High
High
High
—
Open-Drain
Push-Pull
Internal
—
No
Yes
Yes
Yes
No
Open-Drain
Open-Drain
Open-Drain
Open-Drain
Internal
External
External
External
No
Yes
Yes
No
Push-Pull
Push-Pull
High
High
Yes
© 2005 Microchip Technology Inc.
DS21985A-page 1
MCP131X/2X
† Notice: Stresses above those listed under “Maximum Rat-
ings” may cause permanent damage to the device. This is a
stress rating only and functional operation of the device at
those or any other conditions above those indicated in the
operational listings of this specification is not implied. Expo-
sure to maximum rating conditions for extended periods may
affect device reliability.
1.0
ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings†
Supply Voltage (V to V ). . . . . . . . . . . . . . . . . . . . . . 7.0V
DD
SS
Input current (V ) . . . . . . . . . . . . . . . . . . . . . . . . . . . .10 mA
DD
Output current (RST) . . . . . . . . . . . . . . . . . . . . . . . . . .10 mA
Voltage on all inputs and outputs, except Open-Drain RST
(with no internal pull-up resistor), w.r.t. V
SS
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-0.6V to (V + 1.0V)
DD
Voltage on Open-Drain RST
(with no internal pull-up resistor) w.r.t. V
. . -0.6V to 13.5V
SS
Storage temperature . . . . . . . . . . . . . . . . . . .-65°C to +150°C
Ambient temp. with power applied . . . . . . . .-40°C to +125°C
Maximum Junction temp. with power applied . . . . . . . .150°C
Power Dissipation (T ≤ 70°C):
A
5-Pin SOT-23A .......................................................240 mW
ESD protection on all pins..................................................≥ 4 kV
DC CHARACTERISTICS
Electrical Specifications: Unless otherwise indicated, all limits are specified for VDD = 1V to 5.5V, RPU = 100 kΩ
(only MCP1320, MCP1321 and MCP1322), TA = -40°C to +125°C.
Parameters
Sym
Min
Typ
Max
Units
Conditions
Operating Voltage Range
Specified VDD Value to VOUT Low
Operating Current:
VDD
VDD
IDD
1.0
1.0
—
—
—
5
5.5
—
10
2
V
V
I RST = 10 μA, V RST < 0.3V
Watchdog Timer Active
Watchdog Timer Inactive
μA
μA
μA
μA
—
1
—
1
2
VDD < VTRIP
—
5
10
Reset Delay Timer Active
Note 1: Trip point is ±1.5% from typical value.
2: Trip point is ±2.5% from typical value.
3: Hysterysis is minimum = 1%, max = 6% at +25°C.
4: This specification allows this device to be used in PICmicro® microcontroller applications that require the
In-Circuit Serial Programming™ (ICSP™) feature (see device-specific programming specifications for
voltage requirements). The total time that the RST pin can be above the maximum device operational volt-
age (5.5V) is 100s. Current into the RST pin should be limited to 2 mA. It is recommended that the device
operational temperature be maintained between 0°C to +70°C (+25°C preferred). For additional informa-
tion, refer to Figure 2-35.
5: This parameter is established by characterization and is not 100% tested.
6: Custom ordered voltage trip point; minimum order volume requirement. Information available upon request.
DS21985A-page 2
© 2005 Microchip Technology Inc.
MCP131X/2X
DC CHARACTERISTICS (CONTINUED)
Electrical Specifications: Unless otherwise indicated, all limits are specified for VDD = 1V to 5.5V, RPU = 100 kΩ
(only MCP1320, MCP1321 and MCP1322), TA = -40°C to +125°C.
Parameters
VDD Trip Point
Sym
Min
Typ
Max
Units
Conditions
MCP13XX-20 VTRIP
(Note 6)
1.970
1.950
2.069
2.048
2.167
2.145
2.266
2.243
2.364
2.340
2.463
2.438
2.561
2.535
2.660
2.633
2.758
2.730
2.857
2.828
2.955
2.925
3.054
3.023
3.152
3.120
3.251
3.218
2.00
2.00
2.10
2.10
2.20
2.20
2.30
2.30
2.40
2.40
2.50
2.50
2.60
2.60
2.70
2.70
2.80
2.80
2.90
2.90
3.00
3.00
3.10
3.10
3.20
3.20
3.30
3.30
2.030
2.050
2.132
2.153
2.233
2.255
2.335
2.358
2.436
2.460
2.538
2.563
2.639
2.665
2.741
2.768
2.842
2.870
2.944
2.973
3.045
3.075
3.147
3.178
3.248
3.280
3.350
3.383
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
TA = +25°C (Note 1)
TA = -40°C to +85°C (Note 2)
TA = +25°C (Note 1)
MCP13XX-21
(Note 6)
TA = -40°C to +85°C (Note 2)
TA = +25°C (Note 1)
MCP13XX-22
(Note 6)
TA = -40°C to +85°C (Note 2)
TA = +25°C (Note 1)
MCP13XX-23
(Note 6)
TA = -40°C to +85°C (Note 2)
TA = +25°C (Note 1)
MCP13XX-24
(Note 6)
TA = -40°C to +85°C (Note 2)
TA = +25°C (Note 1)
MCP13XX-25
(Note 6)
TA = -40°C to +125°C (Note 2)
TA = +25°C (Note 1)
MCP13XX-26
(Note 6)
TA = -40°C to +125°C (Note 2)
TA = +25°C (Note 1)
MCP13XX-27
(Note 6)
TA = -40°C to +125°C (Note 2)
TA = +25°C (Note 1)
MCP13XX-28
(Note 6)
TA = -40°C to +125°C (Note 2)
TA = +25°C (Note 1)
MCP13XX-29
TA = -40°C to +125°C (Note 2)
TA = +25°C (Note 1)
MCP13XX-30
(Note 6)
TA = -40°C to +125°C (Note 2)
TA = +25°C (Note 1)
MCP13XX-31
(Note 6)
TA = -40°C to +125°C (Note 2)
TA = +25°C (Note 1)
MCP13XX-32
(Note 6)
TA = -40°C to +125°C (Note 2)
TA = +25°C (Note 1)
MCP13XX-33
(Note 6)
TA = -40°C to +125°C (Note 2)
Note 1: Trip point is ±1.5% from typical value.
2: Trip point is ±2.5% from typical value.
3: Hysterysis is minimum = 1%, max = 6% at +25°C.
4: This specification allows this device to be used in PICmicro® microcontroller applications that require the
In-Circuit Serial Programming™ (ICSP™) feature (see device-specific programming specifications for
voltage requirements). The total time that the RST pin can be above the maximum device operational volt-
age (5.5V) is 100s. Current into the RST pin should be limited to 2 mA. It is recommended that the device
operational temperature be maintained between 0°C to +70°C (+25°C preferred). For additional informa-
tion, refer to Figure 2-35.
5: This parameter is established by characterization and is not 100% tested.
6: Custom ordered voltage trip point; minimum order volume requirement. Information available upon request.
© 2005 Microchip Technology Inc.
DS21985A-page 3
MCP131X/2X
DC CHARACTERISTICS (CONTINUED)
Electrical Specifications: Unless otherwise indicated, all limits are specified for VDD = 1V to 5.5V, RPU = 100 kΩ
(only MCP1320, MCP1321 and MCP1322), TA = -40°C to +125°C.
Parameters
Sym
Min
Typ
Max
Units
Conditions
VDD Trip Point (Con’t) MCP13XX-34 VTRIP
(Note 6)
3.349
3.315
3.448
3.413
3.546
3.510
3.645
3.608
3.743
3.705
3.842
3.803
3.940
3.900
4.039
3.998
4.137
4.095
4.236
4.193
4.334
4.290
4.433
4.388
4.531
4.485
4.630
4.583
—
3.40
3.40
3.50
3.50
3.60
3.60
3.70
3.70
3.80
3.80
3.90
3.90
4.00
4.00
4.10
4.10
4.20
4.20
4.30
4.30
4.40
4.40
4.50
4.50
4.60
4.60
4.70
4.70
±40
3.451
3.385
3.553
3.588
3.654
3.690
3.756
3.793
3.857
3.895
3.959
3.998
4.060
4.100
4.162
4.203
4.263
4.305
4.365
4.408
4.466
4.510
4.568
4.613
4.669
4.715
4.771
4.818
—
V
V
TA = +25°C (Note 1)
TA = -40°C to +125°C (Note 2)
TA = +25°C (Note 1)
MCP13XX-35
(Note 6)
V
V
TA = -40°C to +125°C (Note 2)
TA = +25°C (Note 1)
MCP13XX-36
(Note 6)
V
V
TA = -40°C to +125°C (Note 2)
TA = +25°C (Note 1)
MCP13XX-37
(Note 6)
V
V
TA = -40°C to +125°C (Note 2)
TA = +25°C (Note 1)
MCP13XX-38
(Note 6)
V
V
TA = -40°C to +125°C (Note 2)
TA = +25°C (Note 1)
MCP13XX-39
(Note 6)
V
V
TA = -40°C to +125°C (Note 2)
TA = +25°C (Note 1)
MCP13XX-40
(Note 6)
V
V
TA = -40°C to +125°C (Note 2)
TA = +25°C (Note 1)
MCP13XX-41
(Note 6)
V
V
TA = -40°C to +125°C (Note 2)
TA = +25°C (Note 1)
MCP13XX-42
(Note 6)
V
V
TA = -40°C to +125°C (Note 2)
TA = +25°C (Note 1)
MCP13XX-43
(Note 6)
V
V
TA = -40°C to +125°C (Note 2)
TA = +25°C (Note 1)
MCP13XX-44
(Note 6)
V
V
TA = -40°C to +125°C (Note 2)
TA = +25°C (Note 1)
MCP13XX-45
(Note 6)
V
V
TA = -40°C to +125°C (Note 2)
TA = +25°C (Note 1)
MCP13XX-46
V
V
TA = -40°C to +125°C (Note 2)
TA = +25°C (Note 1)
MCP13XX-47
V
(Note 6)
V
TA = -40°C to +125°C (Note 2)
T
ppm/°C
VDD Trip Point Tempco
TPCO
Note 1: Trip point is ±1.5% from typical value.
2: Trip point is ±2.5% from typical value.
3: Hysterysis is minimum = 1%, max = 6% at +25°C.
4: This specification allows this device to be used in PICmicro® microcontroller applications that require the
In-Circuit Serial Programming™ (ICSP™) feature (see device-specific programming specifications for
voltage requirements). The total time that the RST pin can be above the maximum device operational volt-
age (5.5V) is 100s. Current into the RST pin should be limited to 2 mA. It is recommended that the device
operational temperature be maintained between 0°C to +70°C (+25°C preferred). For additional informa-
tion, refer to Figure 2-35.
5: This parameter is established by characterization and is not 100% tested.
6: Custom ordered voltage trip point; minimum order volume requirement. Information available upon request.
DS21985A-page 4
© 2005 Microchip Technology Inc.
MCP131X/2X
DC CHARACTERISTICS (CONTINUED)
Electrical Specifications: Unless otherwise indicated, all limits are specified for VDD = 1V to 5.5V, RPU = 100 kΩ
(only MCP1320, MCP1321 and MCP1322), TA = -40°C to +125°C.
Parameters
Sym
Min
Typ
Max
Units
Conditions
Threshold Hysteresis MCP13XX-20 VHYS
0.020
—
(Note 6)
—
0.120
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
TA = +25°C (Note 3)
TA = -40°C to +85°C
TA = +25°C (Note 3)
TA = -40°C to +85°C
TA = +25°C (Note 3)
TA = -40°C to +85°C
TA = +25°C (Note 3)
TA = -40°C to +85°C
TA = +25°C (Note 3)
TA = -40°C to +85°C
TA = +25°C (Note 3)
TA = -40°C to +125°C
TA = +25°C (Note 3)
TA = -40°C to +125°C
TA = +25°C (Note 3)
TA = -40°C to +125°C
TA = +25°C (Note 3)
TA = -40°C to +125°C
TA = +25°C (Note 3)
TA = -40°C to +125°C
TA = +25°C (Note 3)
TA = -40°C to +125°C
TA = +25°C (Note 3)
TA = -40°C to +125°C
TA = +25°C (Note 3)
TA = -40°C to +125°C
TA = +25°C (Note 3)
TA = -40°C to +125°C
(Note 3)
(Note 6)
MCP13XX-21
(Note 6)
0.021
0.022
0.023
0.024
0.025
0.026
0.027
0.028
0.029
0.030
0.031
0.032
0.033
0.126
0.132
0.138
0.144
0.150
0.156
0.162
0.168
0.174
0.180
0.186
0.192
0.198
(Note 6)
—
MCP13XX-22
(Note 6)
(Note 6)
—
MCP13XX-23
(Note 6)
(Note 6)
—
MCP13XX-24
(Note 6)
(Note 6)
—
MCP13XX-25
(Note 6)
(Note 6)
—
MCP13XX-26
(Note 6)
(Note 6)
—
MCP13XX-27
(Note 6)
(Note 6)
—
MCP13XX-28
(Note 6)
(Note 6)
—
MCP13XX-29
(Note 6)
—
MCP13XX-30
(Note 6)
(Note 6)
—
MCP13XX-31
(Note 6)
(Note 6)
—
MCP13XX-32
(Note 6)
(Note 6)
—
MCP13XX-33 VHYS
(Note 6)
(Note 6)
Note 1: Trip point is ±1.5% from typical value.
2: Trip point is ±2.5% from typical value.
3: Hysterysis is minimum = 1%, max = 6% at +25°C.
4: This specification allows this device to be used in PICmicro® microcontroller applications that require the
In-Circuit Serial Programming™ (ICSP™) feature (see device-specific programming specifications for
voltage requirements). The total time that the RST pin can be above the maximum device operational volt-
age (5.5V) is 100s. Current into the RST pin should be limited to 2 mA. It is recommended that the device
operational temperature be maintained between 0°C to +70°C (+25°C preferred). For additional informa-
tion, refer to Figure 2-35.
5: This parameter is established by characterization and is not 100% tested.
6: Custom ordered voltage trip point; minimum order volume requirement. Information available upon request.
© 2005 Microchip Technology Inc.
DS21985A-page 5
MCP131X/2X
DC CHARACTERISTICS (CONTINUED)
Electrical Specifications: Unless otherwise indicated, all limits are specified for VDD = 1V to 5.5V, RPU = 100 kΩ
(only MCP1320, MCP1321 and MCP1322), TA = -40°C to +125°C.
Parameters
Sym
Min
Typ
Max
Units
Conditions
Threshold Hysteresis MCP13XX-34
0.034
—
(Note 6)
—
0.204
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
TA = +25°C (Note 3)
TA = -40°C to +125°C
TA = +25°C (Note 3)
TA = -40°C to +125°C
TA = +25°C (Note 3)
TA = -40°C to +125°C
TA = +25°C (Note 3)
TA = -40°C to +125°C
TA = +25°C (Note 3)
TA = -40°C to +125°C
TA = +25°C (Note 1)
TA = -40°C to +125°C
TA = +25°C (Note 3)
TA = -40°C to +125°C
TA = +25°C (Note 3)
TA = -40°C to +125°C
TA = +25°C (Note 3)
TA = -40°C to +125°C
TA = +25°C (Note 3)
TA = -40°C to +125°C
TA = +25°C (Note 3)
TA = -40°C to +125°C
TA = +25°C (Note 3)
TA = -40°C to +125°C
TA = +25°C (Note 3)
TA = -40°C to +125°C
TA = +25°C (Note 3)
TA = -40°C to +125°C
(Continued) (Note 3)
(Note 6)
MCP13XX-35
(Note 6)
0.035
0.036
0.037
0.038
0.039
0.040
0.041
0.042
0.043
0.044
0.045
0.046
0.047
0.210
0.216
0.222
0.228
0.234
0.240
0.246
0.252
0.258
0.264
0.270
0.276
0.282
(Note 6)
—
MCP13XX-36
(Note 6)
(Note 6)
—
MCP13XX-37
(Note 6)
(Note 6)
—
MCP13XX-38
(Note 6)
(Note 6)
—
MCP13XX-39
(Note 6)
(Note 6)
—
MCP13XX-40
(Note 6)
(Note 6)
—
MCP13XX-41
(Note 6)
(Note 6)
—
MCP13XX-42
(Note 6)
(Note 6)
—
MCP13XX-43
(Note 6)
(Note 6)
—
MCP13XX-44
(Note 6)
(Note 6)
—
MCP13XX-45
(Note 6)
(Note 6)
—
MCP13XX-46
(Note 6)
—
MCP13XX-47 VHYS
(Note 6)
(Note 6)
Note 1: Trip point is ±1.5% from typical value.
2: Trip point is ±2.5% from typical value.
3: Hysterysis is minimum = 1%, max = 6% at +25°C.
4: This specification allows this device to be used in PICmicro® microcontroller applications that require the
In-Circuit Serial Programming™ (ICSP™) feature (see device-specific programming specifications for
voltage requirements). The total time that the RST pin can be above the maximum device operational volt-
age (5.5V) is 100s. Current into the RST pin should be limited to 2 mA. It is recommended that the device
operational temperature be maintained between 0°C to +70°C (+25°C preferred). For additional informa-
tion, refer to Figure 2-35.
5: This parameter is established by characterization and is not 100% tested.
6: Custom ordered voltage trip point; minimum order volume requirement. Information available upon request.
DS21985A-page 6
© 2005 Microchip Technology Inc.
MCP131X/2X
DC CHARACTERISTICS (CONTINUED)
Electrical Specifications: Unless otherwise indicated, all limits are specified for VDD = 1V to 5.5V, RPU = 100 kΩ
(only MCP1320, MCP1321 and MCP1322), TA = -40°C to +125°C.
Parameters
Sym
Min
Typ
Max
Units
Conditions
RST/RST Low-Level Output Voltage
VOL
—
—
—
—
0.3
0.3
V
V
IOL = 50 μA, 1.0V ≤ VDD ≤ 1.5V
I
OL = 100 μA,
1.5V < VDD ≤ 2.5V
—
—
—
—
—
0.3
0.3
—
V
V
V
IOL = 2 mA, 2.5V < VDD ≤ 4.5V
I
OL = 4 mA, VDD > 4.5V
RST/RST High-Level Output Voltage
(Push-Pull Outputs only)
VOH
VDD
0.7
–
IOH = 2.5 mA, VDD ≥ 2.5V
VDD
0.7
–
—
—
V
IOH = 500 μA, VDD ≥ 1.5V
Input Low Voltage (MR and WDI pins)
Input High Voltage (MR and WDI pins)
VIL
VIH
VSS
0.7VDD
—
—
—
—
0.3VDD
VDD
13.5 (4)
V
V
V
Open-Drain High Voltage on Output
VODH
Open-Drain Output pin only,
VDD = 3.0V, Time voltage >
5.5V applied ≤ 100 s,
current into pin limited to 2 mA,
+25°C operation recom-
mended
(Note 4)
(Note 4, Note 5)
Input Leakage Current (MR and WDI)
IIL
—
—
—
±1
μA
μA
VSS ≤ VPIN ≤ VDD
Open-Drain Output Leakage Current
(MCP1316M, MCP1318M,
IOD
0.003
1.0
MCP1319M, MCP1320, MCP1321
and MCP1322 only)
Pull-up Resistance
MR pin
WDI pin
RST pin
RPU
—
—
—
52
52
—
—
—
kΩ
kΩ
kΩ
VDD = 5.5V
VDD = 5.5V
4.7
VDD = 5.5V,
MCP131XM devices only
Input Pin Capacitance (MR and WDI)
CI
—
—
100
—
—
pF
pF
Output Pin Capacitive Loading
(RST and RST)
CO
50
This is the tester loading to
meet the AC timing specifica-
tions.
Note 1: Trip point is ±1.5% from typical value.
2: Trip point is ±2.5% from typical value.
3: Hysterysis is minimum = 1%, max = 6% at +25°C.
4: This specification allows this device to be used in PICmicro® microcontroller applications that require the
In-Circuit Serial Programming™ (ICSP™) feature (see device-specific programming specifications for
voltage requirements). The total time that the RST pin can be above the maximum device operational volt-
age (5.5V) is 100s. Current into the RST pin should be limited to 2 mA. It is recommended that the device
operational temperature be maintained between 0°C to +70°C (+25°C preferred). For additional informa-
tion, refer to Figure 2-35.
5: This parameter is established by characterization and is not 100% tested.
6: Custom ordered voltage trip point; minimum order volume requirement. Information available upon request.
© 2005 Microchip Technology Inc.
DS21985A-page 7
MCP131X/2X
VTRIPAC + VHYS
VTRIPMAX
VTRIPMIN
VDD
tRR
tRST
1V
tRST
tRPD
VTRIP
RST
RST
VDD < 1V is outside the device operating specification. The RST (or RST) output state is
unknown while VDD < 1V.
FIGURE 1-1:
TABLE 1-1:
Device Voltage and Reset Pin Waveforms.
DEVICE VOLTAGE AND RESET PIN TIMINGS
Electrical Specifications: Unless otherwise indicated, all limits are specified for VDD = 1V to 5.5V, RPU = 100 kΩ
(only MCP1320, MCP1321 and MCP1322), TA = -40°C to +125°C.
Parameters
Sym
Min
Typ
Max
Units
Conditions
VDD ramped from
VTRIPMAX + 250 mV down to
TRIPMIN – 200 mV,
Falling VDD Trip Point Detected
to RST or RST Active
tRPD
—
650
—
μs
V
VDD falling @ 5 mV/μs,
CL = 50 pF (Note 1)
VDD Rise Rate
tRR
Note 3
1.4
Reset active time
tRST
1.0
20
2.0
40
ms
ms
ms
ms
μs
Note 2
(MR Rising Edge, POR/BOR
Inactive, or WDT time out) to
RST/RST Inactive
30
Note 2
140
1120
—
200
1600
5
280
2240
—
Standard Time Out
Note 2
RST Rise Time After RST Active
tRT
For RST 10% to 90% of VDD
,
,
,
,
(Push-Pull Outputs only)
CL = 50 pF (Note 1)
RST Rise Time After RST Inactive
(Push-Pull Outputs only)
—
—
—
5
5
5
—
—
—
μs
μs
μs
For RST 10% to 90% of VDD
CL = 50 pF (Note 1)
RST Fall Time after RST Inactive
RST Fall Time after RST Active
tFT
For RST 90% to 10% of VDD
CL = 50 pF (Note 1)
For RST 90% to 10% of VDD
CL = 50 pF (Note 1)
Note 1: These parameters are for design guidance only and are not 100% tested.
2: Custom ordered Reset active time; minimum order volume requirement.
3: Designed to be independent of VDD rise rate. Device characterization was done with a rise rate as slow as
0.1 V/s (@ +25°C).
DS21985A-page 8
© 2005 Microchip Technology Inc.
MCP131X/2X
tMR
MR
tRST
tNF
tMRD
RST
RST
FIGURE 1-2:
MR and Reset Pin Waveforms.
TABLE 1-2:
MR AND RESET PIN TIMINGS
Electrical Specifications: Unless otherwise indicated, all limits are specified for VDD = 1V to 5.5V, RPU = 100 kΩ
(only MCP1320, MCP1321 and MCP1322), TA = -40°C to +125°C.
Parameters
MR Pulse Width
Sym
Min
Typ
Max
Units
Conditions
tMR
tMRD
tNF
1
—
—
—
—
μs
ns
ns
MR Active to RST/RST Active
MR Input Noise filter
—
—
235
150
VDD = 5.0V
VDD = 5.0V
Note 1: These parameters are for design guidance only and are not 100% tested.
RST
RST
tRST
WDI (Note 1)
tWP
tWD
tWD
Note 1: The WDI pin was a weak pull-up resistor which is disabled after the 1st falling edge on the WDI pin.
FIGURE 1-3:
TABLE 1-3:
WDI and Reset Pin Waveforms.
WDI AND RESET PIN TIMINGS
Electrical Specifications: Unless otherwise indicated, all limits are specified for VDD = 1V to 5.5V, RPU = 100 kΩ
(only MCP1320, MCP1321 and MCP1322), TA = -40°C to +125°C.
Parameters
WDI Pulse Width
Watchdog Time Out Period
Sym
Min
Typ
Max
Units
Conditions
tWP
tWD
50
4.3
—
6.3
—
9.3
ns
ms
ms
sec
sec
Note 1
Note 1
71
102
1.6
153
2.4
1.12
17.9
Standard Time Out
25.6
38.4
Note 1
Note 1: Custom ordered WatchDog Timer time out; minimum order volume requirement.
© 2005 Microchip Technology Inc.
DS21985A-page 9
MCP131X/2X
TEMPERATURE CHARACTERISTICS
Electrical Specifications: Unless otherwise noted, all limits are specified for VDD = 1V to 5.5V, RPU = 100 kΩ
(only MCP1316), TA = -40°C to +125°C.
Parameters
Sym
Min
Typ
Max
Units
Conditions
Temperature Ranges
Specified Temperature Range
Specified Temperature Range
Maximum Junction Temperature
Storage Temperature Range
Package Thermal Resistances
Thermal Resistance, 5L-SOT23
TA
TA
TJ
TA
-40
-40
—
—
—
—
—
+85
°C
°C
°C
°C
MCP13XX-25 (or below)
+125
+150
+150
Except MCP13XX-25 (or below)
-65
θJA
—
255.9
—
°C/W
DS21985A-page 10
© 2005 Microchip Technology Inc.
MCP131X/2X
2.0
TYPICAL PERFORMANCE CURVES
Note:
The graphs and tables provided following this note are a statistical summary based on a limited number of
samples and are provided for informational purposes only. The performance characteristics listed herein
are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified
operating range (e.g., outside specified power supply range) and therefore outside the warranted range.
Note: Unless otherwise indicated, all limits are specified for VDD = 1V to 5.5V, RPU = 100 kΩ (only MCP1316;
see Figure 4-1), TA = -40°C to +125°C.
1.2
1
4.8V
5.0V
5.5V
1.0V
3.0V
4.8V
1.5V
4.3V
5.0V
2.0V
4.5V
5.5V
6
5
4
3
2
1
0
0.8
0.6
0.4
0.2
0
-100
-50
0
50
100
150
-100
-50
0
50
100
150
Temperature (°C)
Temperature (°C)
FIGURE 2-1:
IDD vs. Temperature (Reset
FIGURE 2-4:
IDD vs. Temperature (Reset
Power-up Timer Inactive and Watchdog Timer
Power-up Timer Active) (MCP1318M-4.6).
Inactive) (MCP1318M-4.6).
1.4
3.2V
4.0V
4.5V
5.0V
5.5V
1.0V
2.7V
4.5V
1.5V
3.2V
5.0V
2.5V
4.0V
5.5V
6
5
4
3
2
1
0
1.2
1
0.8
0.6
0.4
0.2
0
-100
-50
0
50
100
150
-100
-50
0
50
100
150
Temperature (°C)
Temperature (°C)
FIGURE 2-2:
IDD vs. Temperature (Reset
FIGURE 2-5:
IDD vs. Temperature (Reset
Power-up Timer Inactive and Watchdog Timer
Power-up Timer Active) (MCP1319-2.9).
Inactive) (MCP1319-2.9).
2.2V
2.5V
4.0V
4.5V
5.0V
5.5V
1.8
7
6
5
4
3
2
1
0
1.0V
2.2V
4.5V
1.5V
2.5V
5.0V
1.8V
4.0V
5.5V
1.6
1.4
1.2
1
0.8
0.6
0.4
0.2
0
-100
-50
0
50
100
150
-100
-50
0
50
100
150
Temperature (°C)
Temperature (°C)
FIGURE 2-3:
IDD vs. Temperature (Reset
FIGURE 2-6:
IDD vs. Temperature (Reset
Power-up Timer Inactive and Watchdog Timer
Power-up Timer Active) (MCP1316-2.0).
Inactive) (MCP1316-2.0).
© 2005 Microchip Technology Inc.
DS21985A-page 11
MCP131X/2X
Note: Unless otherwise indicated, all limits are specified for VDD = 1V to 5.5V, RPU = 100 kΩ (only MCP1316;
see Figure 4-1), TA = -40°C to +125°C.
4.8V
5.0V
5.5V
7
6
5
4
3
2
1
0
-100
-50
0
50
100
150
Temperature (°C)
FIGURE 2-7:
IDD vs. Temperature
(Watchdog Timer Active) (MCP1318M-4.6).
MCP1319 does not
have a Watchdog Timer
FIGURE 2-8:
IDD vs. Temperature
(Watchdog Timer Active) (MCP1319-2.9).
2.2V
2.5V
4.0V
4.5V
5.0V
5.5V
7
6
5
4
3
2
1
0
-100
-50
0
50
100
150
Temperature (°C)
FIGURE 2-9:
IDD vs. Temperature
(Watchdog Timer Active) (MCP1316-2.0).
DS21985A-page 12
© 2005 Microchip Technology Inc.
MCP131X/2X
Note: Unless otherwise indicated, all limits are specified for VDD = 1V to 5.5V, RPU = 100 kΩ (only MCP1316;
see Figure 4-1), TA = -40°C to +125°C.
-45°C
25°C
90°C
130°C
1.2
1
6
5
4
3
2
1
0
130°C
90°C
25°C
-45°C
0.8
0.6
0.4
0.2
0
0.0
1.0
2.0
3.0
4.0
5.0
6.0
4.6
4.8
5.0
5.2
5.4
5.6
VDD (V)
VDD (V)
FIGURE 2-10:
IDD vs. VDD (Reset
FIGURE 2-13:
IDD vs. VDD (Reset
Power-up Timer Inactive and Watchdog Timer
Power-up Timer Active or Watchdog Timer
Inactive) (MCP1318M-4.6).
Active) (MCP1318M-4.6).
-45°C
25°C
90°C
130°C
1.4
130°C
6
5
4
3
2
1
0
1.2
90°C
1
0.8
0.6
25°C
-45°C
0.4
0.2
0
0.0
1.0
2.0
3.0
4.0
5.0
6.0
0.0
1.0
2.0
3.0
VDD (V)
4.0
5.0
6.0
VDD (V)
FIGURE 2-11:
IDD vs. VDD (Reset
FIGURE 2-14:
IDD vs. VDD (Reset
Power-up Timer Inactive and Watchdog Timer
Power-up Timer Active or Watchdog Timer
Inactive) (MCP1319-2.9).
Active) (MCP1319-2.9).
-45°C
25°C
90°C
130°C
1.8
7
6
5
4
3
2
1
0
130°C
90°C
25°C
-45°C
1.6
1.4
1.2
1
0.8
0.6
0.4
0.2
0
0.0
1.0
2.0
3.0
4.0
5.0
6.0
2.0
3.0
4.0
VDD (V)
5.0
6.0
VDD (V)
FIGURE 2-12:
IDD vs. VDD (Reset
FIGURE 2-15:
IDD vs. VDD (Reset
Power-up Timer Inactive and Watchdog Timer
Power-up Timer Active or Watchdog Timer
Inactive) (MCP1316-2.0).
Active) (MCP1316-2.0).
© 2005 Microchip Technology Inc.
DS21985A-page 13
MCP131X/2X
Note: Unless otherwise indicated, all limits are specified for VDD = 1V to 5.5V, RPU = 100 kΩ (only MCP1316;
see Figure 4-1), TA = -40°C to +125°C.
1V
2V
3V
4.3V
4.5V
4.8V
5V
5.5V
4.800
4.750
4.700
4.650
4.600
4.550
4.0
3.9
3.8
3.7
3.6
3.5
3.4
3.3
3.2
3.1
3.0
0.16
0.14
0.12
0.1
VTRIP Up
VHYST
0.08
0.06
0.04
0.02
0
VTRIP Down
-50
0
50
100
150
0.00
2.00
4.00
6.00
8.00
10.00
IOL (mA)
Temperature (°C)
FIGURE 2-16:
Temperature (MCP1318M-4.6).
VTRIP and VHYST vs.
FIGURE 2-19:
(MCP1318M-4.6).
V
OL vs. IOL
1V
2.5V
2.7V
3.2V
4V
4.5V
5V
5.5V
3.020
3.5
3.4
3.4
3.3
3.3
3.2
3.2
3.1
3.1
3.0
VTRIP Up
0.16
0.14
0.12
0.1
3.000
VHYST
2.980
2.960
2.940
2.920
0.08
0.06
0.04
0.02
0
VTRIP Down
2.900
2.880
0.00
2.00
4.00
6.00
8.00
10.00
-50
0
50
100
150
IOL (mA)
Temperature (°C)
FIGURE 2-17:
VTRIP and VHYST vs.
FIGURE 2-20:
VOL vs. IOL
Temperature (MCP1319-2.9).
(MCP1319-2.9).
2.050
2.040
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0.02
0.018
0.016
0.014
0.012
0.01
0.008
0.006
0.004
0.002
0
VTRIP Up
1V
VHYST
2.030
1.8V
2.020
2.010
VTRIP Down
2.000
1.990
0.00
0.05
0.10
0.15
0.20
0.25
-50
0
50
100
150
IOL (mA)
Temperature (°C)
FIGURE 2-18:
VTRIP and VHYST vs.
FIGURE 2-21:
VOL vs. IOL
Temperature (MCP1316-2.0).
(MCP1316-2.0).
DS21985A-page 14
© 2005 Microchip Technology Inc.
MCP131X/2X
Note: Unless otherwise indicated, all limits are specified for VDD = 1V to 5.5V, RPU = 100 kΩ (only MCP1316;
see Figure 4-1), TA = -40°C to +125°C.
5
4.5
4
3.5
3
2.5
2
1.5
1
0.14
0.12
0.1
4.5V
4.3V
0.2 mA
0.15 mA
0.08
0.06
0.04
0.02
0
3V
0.1 mA
0.05 mA
0 mA
2V
1.5V
0.5
0
0.00
1.00
2.00
3.00
4.00
5.00
6.00
6.00
6.00
-50
0
50
100
150
IOH (mA)
Temperature (°C)
FIGURE 2-22:
(MCP1318M-4.6 @ VDD = 4.5V).
VOL vs. Temperature
FIGURE 2-25:
(MCP1318M-4.6 @ 25C).
VOH vs. IOH
6
5
4
3
2
0.25
0.2
5.5V
5V
4.5V
4V
0.2 mA
0.15 mA
0.1 mA
0.15
0.1
3.2V
2.7V
2.5V
0.05 mA
0.05
0
1
0
1.5V
0 mA
0.00
1.00
2.00
3.00
4.00
5.00
-50
0
50
100
150
I
OH (mA)
Temperature (°C)
FIGURE 2-23:
(MCP1319-2.9 @ VDD = 2.7V).
VOL vs. Temperature
FIGURE 2-26:
(MCP1319-2.9 @ 25C).
VOH vs. IOH
0.016
0.014
0.012
0.01
6
5
4
3
0.2 mA
5.5V
5V
4.5V
4V
0.15 mA
0.1 mA
0.008
0.006
0.004
0.002
0
2
1
0
2.2V
2.5V
0.05 mA
0 mA
0.00
1.00
2.00
3.00
4.00
5.00
-50
0
50
100
150
IOH (mA)
Temperature (°C)
FIGURE 2-24:
VOL vs. Temperature
FIGURE 2-27:
VOH vs. IOH
(MCP1316-2-0 @ VDD = 1.8V).
(MCP1316-2.0 @ 25C).
© 2005 Microchip Technology Inc.
DS21985A-page 15
MCP131X/2X
Note: Unless otherwise indicated, all limits are specified for VDD = 1V to 5.5V, RPU = 100 kΩ (only MCP1316;
see Figure 4-1), TA = -40°C to +125°C.
4.8 V
5 V
5.5 V
350
300
250
200
150
100
50
230
225
220
215
210
205
200
195
190
5V
5.5V
0
-100
-50
0
50
100
150
150
150
-100
-50
0
50
100
150
150
150
Temperature (°C)
Temperature (°C)
FIGURE 2-28:
(MCP1318M-4.6).
tRPD vs. Temperature
FIGURE 2-31:
(MCP1318M-4.6).
tRPU vs. Temperature
3.2 V
4 V
4.5 V
5 V
5.5 V
3.2V
4V
4.5V
5V
5.5V
250
245
240
235
230
225
220
215
210
205
200
450
400
350
300
250
200
150
100
50
0
-100
-50
0
50
100
-100
-50
0
50
100
Temperature (°C)
Temperature (°C)
FIGURE 2-29:
(MCP1319-2.9).
tRPD vs. Temperature
FIGURE 2-32:
(MCP1319-2.9).
tRPU vs. Temperature
2.5 V
4 V
4.5 V
5 V
5.5 V
2.2 V
2.5V
4V
4.5V
5V
5.5V
350
300
250
200
150
100
50
250
245
240
235
230
225
220
215
210
205
200
0
-100
-50
0
50
100
-100
-50
0
50
100
Temperature (°C)
Temperature (°C)
FIGURE 2-30:
tRPD vs. Temperature
FIGURE 2-33:
tRPU vs. Temperature
(MCP1316-2.0).
(MCP1316-2.0).
DS21985A-page 16
© 2005 Microchip Technology Inc.
MCP131X/2X
Note: Unless otherwise indicated, all limits are specified for VDD = 1V to 5.5V, RPU = 100 kΩ (only MCP1316;
see Figure 4-1), TA = -40°C to +125°C.
VRST=2.0V
VRST=2.9V
VRST=4.6V
3500
3000
2500
2000
1500
1000
500
MCP1318M does not
have a MR pin
2.0V
2.9V
0
0.001
0.01
0.1
1
10
Reset Threshold Overdrive (V) VTRIPMin - VDD
FIGURE 2-34:
Transient Duration vs.
FIGURE 2-36:
MR Low to Reset
VTRIP (min) – VDD
.
Propagation Delay (MCP1318M-4.6).
3.2 V
4 V
4.5 V
5 V
5.5 V
2.2 V
2.5 V
4 V
4.5 V
5 V
5.5 V
350
300
250
200
150
100
50
0.012
0.01
0.008
0.006
0.004
0.002
0
0
-100
-50
0
50
100
150
-100
-50
0
50
100
150
Temperature (°C)
Temperature (°C)
FIGURE 2-35:
Open-Drain Leakage
FIGURE 2-37:
MR Low to Reset
Current vs. Temperature (MCP1320-2.0).
Propagation Delay (MCP1319-2.9).
2.2 V
2.5 V
4 V
4.5 V
5 V
5.5 V
450
400
350
300
250
200
150
100
50
0
-100
-50
0
50
100
150
Temperature (°C)
FIGURE 2-38:
MR Low to Reset
Propagation Delay (MCP1316-2.0).
© 2005 Microchip Technology Inc.
DS21985A-page 17
MCP131X/2X
Note: Unless otherwise indicated, all limits are specified for VDD = 1V to 5.5V, RPU = 100 kΩ (only MCP1316;
see Figure 4-1), TA = -40°C to +125°C.
0.145
0.14
1000
900
800
700
600
500
400
300
200
100
0
5V to 4.5V
0.135
0.13
MCP1318M-4.6
0.125
0.12
5V to 0V
-100
-50
0
50
100
150
-100
-50
0
50
100
150
Temperature (°C)
Temperature (°C)
FIGURE 2-39:
VDD Falling to Reset
FIGURE 2-42:
Normalized Reset Time Out
Propagation Delay vs. Temperature
Period vs. Temperature (MCP1318M-4.6).
(MCP1318M-4.6).
0.15
0.145
0.14
250
5V to 2.7V
200
150
100
50
VTRIP Typ + 0.3V to
TRIP Min - 0.2V
MCP1319-2.9
V
0.135
0.13
5V to 0V
0.125
-100
-50
0
50
100
150
0
-100
-50
0
50
100
150
Temperature (°C)
Temperature (°C)
FIGURE 2-43:
Normalized Reset Time Out
FIGURE 2-40:
V
DD Falling to Reset
Period vs. Temperature (MCP1319-2.9).
Propagation Delay vs. Temperature
(MCP1319-2.9).
0.15
0.145
0.14
250
5V to 1.8V
200
150
100
50
MCP1316-2.0
0.135
VTRIP Typ + 0.2V to
VTRIP Min - 0.2V
0.13
0.125
5V to 0V
-100
-50
0
50
100
150
0
Temperature (°C)
-100
-50
0
50
100
150
FIGURE 2-44:
Normalized Reset Time Out
Temperature (°C)
Period vs. Temperature (MCP1316-2.0).
FIGURE 2-41:
VDD Falling to Reset
Propagation Delay vs. Temperature
(MCP1316-2.0).
DS21985A-page 18
© 2005 Microchip Technology Inc.
MCP131X/2X
Note: Unless otherwise indicated, all limits are specified for VDD = 1V to 5.5V, RPU = 100 kΩ (only MCP1316;
see Figure 4-1), TA = -40°C to +125°C.
1.25
1.2
VRST=2.0V
VRST=2.9V
VRST=4.6V
600
500
400
300
200
100
0
1.15
1.1
MCP1318M-4.6
1.05
1
`
0.95
0.9
0.001
0.01
0.1
1
10
-100
-50
0
50
100
150
Reset Threshold Overdrive (V) VTRIPMin - VDD
Temperature (°C)
FIGURE 2-45:
Normalized Watchdog Time
FIGURE 2-48:
Max VDD Transient Duration
Out Period vs. Temperature (MCP1318M-4.6).
vs. Reset Threshold Overdrive.
MCP1319 does not
have a Watchdog Timer
FIGURE 2-46:
Normalized Watchdog Time
FIGURE 2-49:
“M” Part # Pull-up
Out Period vs. Temperature (MCP1319-2.9).
Characteristics (MCP1318M-4.6).
1.25
1.2
1.15
1.1
MCP1316-2.0
1.05
`
1
0.95
0.9
-100
-50
0
50
100
150
Temperature (°C)
FIGURE 2-47:
Normalized Watchdog Time
Out Period vs. Temperature (MCP1316-2.0).
© 2005 Microchip Technology Inc.
DS21985A-page 19
MCP131X/2X
3.0
PIN DESCRIPTION
The descriptions of the pins are listed in Table 3-1.
TABLE 3-1: PIN FUNCTION TABLE
Pin No.
Buffer/
Driver
Type
Pin
Type
Device
Symbol
Function
SOT23-5
1
MCP1316M (1)
MCP1318M (1)
MCP1319M (1)
MCP1320,
MCP1321,
MCP1322
,
,
,
RST
O
Open-Drain Reset Output (active-low)
Goes active (Low) if one of these conditions occurs:
1. If VDD falls below the selected Reset voltage
threshold.
2. If the MR pin is forced low.
3. If the WDI pin does not detect an edge transition
within the minimum selected time out period.
4. During power-up.
VDD Falling:
Open-Drain = VDD > VTRIP
L = VDD < VTRIP
VDD Rising:
Open-Drain = VDD > VTRIP + VHYS
L = VDD < VTRIP + VHYS
MCP1316,
MCP1318,
MCP1319
O
O
Push-Pull VDD Falling:
H = VDD > VTRIP
L = VDD < VTRIP
VDD Rising:
H = VDD > VTRIP + VHYS
L = VDD < VTRIP + VHYS
MCP1317
RST
Push-Pull Reset Output (active-high)
Goes active (High) if one of these conditions occurs:
1. If VDD falls below the selected Reset voltage
threshold.
2. If the MR pin is forced low.
3. If the WDI pin does not detect an edge transition
within the minimum selected time out period.
4. During power-up.
VDD Falling:
H = VDD < VTRIP
L = VDD > VTRIP
VDD Rising:
H = VDD < VTRIP + VHYS
L = VDD > VTRIP + VHYS
2
All
VSS
—
P
The ground reference for the device.
Note 1: Open-Drain output with internal pull-up resistor.
DS21985A-page 20
© 2005 Microchip Technology Inc.
MCP131X/2X
TABLE 3-1: PIN FUNCTION TABLE (CONTINUED)
Pin No.
Buffer/
Driver
Type
Pin
Type
Device
Symbol
Function
SOT23-5
3
MCP1316,
MCP1316M,
MCP1317,
MCP1320
MR
I
ST
Manual Reset input for a Reset switch.
This input allows a push button switch to be directly con-
nected to the MCP131X/2X MR pin, which can then be
used to force a system Reset. This input filters (ignores)
noise pulses that occur on the MR pin.
L = Switch is depressed (shorted to ground). This forces
the RST/RST pins Active.
H = Switch is open (internal pull-up resistor pulls signal
high). State of the RST/RST pins determined by
other system conditions.
MCP1318,
MCP1318M,
MCP1319,
MCP1319M,
MCP1321,
MCP1322
RST
O
Push-Pull Reset Output (active-high)
Goes active (High) if one of these conditions occurs:
1. If VDD falls below the selected Reset voltage
threshold.
2. If the MR pin is forced low.
3. If the WDI pin does not detect an edge transition
within the minimum selected time out period.
4. During power-up.
VDD Falling:
H = VDD < VTRIP
L = VDD > VTRIP
VDD Rising:
H = VDD < VTRIP + VHYS
L = VDD > VTRIP + VHYS
4
MCP1316,
MCP1316M,
MCP1317,
MCP1318,
MCP1318M,
MCP1320,
MCP1321
WDI
MR
I
I
ST
ST
Watchdog Timer Input
The WDT period is specified at the time of device order.
The Standard WDT period is 1.6s typical.
An edge transition on the WDI pin resets the Watchdog
Timer counter (no time out). A Falling Edge is required to
start the WDT Timer.
MCP1319,
MCP1319M,
MCP1322
Manual Reset input for a Reset switch.
This input allows a push button switch to be directly con-
nected to the MCP131X/2X MR pin, which can then be
used to force a system Reset. This input filters (ignores)
noise pulses that occur on the MR pin.
L = Switch is depressed (shorted to ground). This forces
the RST/RST pins Active.
H = Switch is open (internal pull-up resistor pulls signal
high). State of the RST/RST pins determined by
other system conditions.
5
All
VDD
—
P
The positive supply for the device.
Note 1: Open-Drain output with internal pull-up resistor.
© 2005 Microchip Technology Inc.
DS21985A-page 21
MCP131X/2X
3.1
Ground Terminal (V
)
3.4
Manual Reset Input (MR)
SS
VSS provides the negative reference for the analog
input voltage. Typically, the circuit ground is used.
The Manual Reset (MR) input pin allows a push button
switch to easily be connected to the system. When the
push button is depressed, it forces a system Reset.
This pin has circuitry that filters noise that may be
present on the MR signal.
3.2
Supply Voltage (V
)
DD
VDD can be used for power supply monitoring or a
voltage level that requires monitoring.
The MR pin is active-low and has an internal pull-up
resistor.
3.3
Reset Output (RST and RST)
3.5
Watchdog Input
There are four types of Reset output pins. These are:
In some systems, it is desirable to have an external
Watchdog Timer to monitor the operation of the sys-
tem. This is done by requiring the embedded controller
to “pet” the Watchdog Timer within a predetermined
time frame (TWD). If the MCP131X/2X is not “petted”
within this time frame, the MCP131X/2X will force the
Reset pin(s) active.
1. Open-Drain active-low Reset, External pull-up
resistor required
2. Open-Drain active-low Reset, Internal pull-up
resistor
3. Push-Pull active-low Reset
4. Push-Pull active-high Reset
The embedded controller “pets” the MCP131X/2X by
forcing an edge transition on the WDI pin. The WDT
Timer is activated by the first falling edge on the WDI
pin.
Some devices have both an active-low and active-high
Reset output.
3.3.1
ACTIVE-LOW (RST) - OPEN-DRAIN,
EXTERNAL PULL-UP RESISTOR
The standard offering devices have a typical Watchdog
Timer period (TWD) of 1.6 s. Table 1-3 shows the avail-
able Watchdog Timer periods.
The RST open-drain output remains low while VDD is
below the Reset voltage threshold (VTRIP). Once the
device voltage (VDD) returns to a high level (VTRIP
+
VHYS), the device will remain in Reset for the Reset
delay timer (TRST). After that time expires, the RST pin
will float, and an external pull-up resistor is required to
bring the output to the high state.
3.3.2
ACTIVE-LOW (RST) - OPEN-DRAIN,
INTERNAL PULL-UP RESISTOR
The RST open-drain output remains low while VDD is
below the Reset voltage threshold (VTRIP). Once the
device voltage (VDD) returns to a high level (VTRIP
+
VHYS), the device will remain in Reset for the Reset
delay timer (TRST). After that time expires, the RST pin
will be pulled high by an internal pull-up resistor (typi-
cally 4.7 kΩ).
3.3.3
ACTIVE-LOW (RST) - PUSH-PULL
The RST push-pull output remains low while VDD is
below the Reset voltage threshold (VTRIP). Once the
device voltage (VDD) returns to a high level (VTRIP
+
VHYS), the device will remain in Reset for the Reset
delay timer (TRST). After that time expires, the RST pin
will be driven to the high state.
3.3.4
ACTIVE-HIGH (RST) - PUSH-PULL
The RST push-pull output remains high while VDD is
below the Reset voltage threshold (VTRIP). Once the
device voltage (VDD) returns to a high level (VTRIP
+
VHYS), the device will remain in Reset for the Reset
delay timer (TRST). After that time expires, the RST pin
will be driven to the low state.
DS21985A-page 22
© 2005 Microchip Technology Inc.
MCP131X/2X
4.0
OPERATIONAL DESCRIPTION
VDD
For many of today’s microcontroller applications, care
must be taken to prevent low-power conditions that can
cause many different system problems. The most
common causes are brown-out conditions, where the
system supply drops below the operating level momen-
tarily. The second most common cause is when a
slowly decaying power supply causes the
microcontroller to begin executing instructions without
sufficient voltage to sustain volatile memory (RAM),
thus producing indeterminate results. Figure 4-1 shows
a typical application circuit.
VDD
VDD
PICmicro®
Microcontroller
(1)
0.1
μF
RPU
MCP13XX
MCLR
(Reset input)
(active-low)
RST
RST (2)
MR
I/O
WDI
VSS
VSS
The MCP131X/2X family is voltage supervisor devices
designed to keep a microcontroller in Reset until the
system voltage has reached and stabilized at the
proper level for reliable system operation. These
devices also operate as protection from brown-out
conditions when the system supply voltage drops
below a safe operating level.
To system
device that
requires active-
high resets
Push button
switch
Note 1: Resistor RPU may be required with the
MCP1320, MCP1321 or MCP1322 due
to the open-drain output.
Some MCP131X/2X family members include a Watch-
dog Timer feature that after being enabled (by a falling
edge on the WDI pin), monitors the WDI pin for falling
edges. If an edge transition is not detected within the
expected timeframe, the MCP131X/2X devices will
force the Reset pin active. This is useful to ensure that
the embedded system’s Host Controller program is
operating as expected.
Resistor RPU may not be required with
the MCP1316M, MCP1318M or
MCP1319M due to the internal pull-up
resistor.
The MCP1316, MCP1317, MCP1318
and MCP1319 do not require the
external pull-up resistor.
Some MCP131X/2X family members include a Manual
Reset feature that allows a push button switch to be
directly connected to the MCP131X/2X devices (on the
MR pin). This allows the system to easily be reset from
the external control of the push button switch.
2: Not all devices offer the active-high
Reset output pin.
FIGURE 4-1:
Typical Application Circuit.
A superset block diagram is shown in Figure 4-2, with
device specific block diagrams shown in Figure 4-3
through Figure 4-12.
VDD
Comparator
+
RST
RST
–
Output
Driver
Reference
Voltage
MR
Noise Filter
Watchdog
VSS
WDI
Note: Features available depend on the device.
FIGURE 4-2: Family Block Diagram
© 2005 Microchip Technology Inc.
DS21985A-page 23
MCP131X/2X
4.0.1
DEVICE SPECIFIC BLOCK
DIAGRAMS
VDD
VDD
Comparator
Comparator
+
–
+
–
RST
RST
RST
Output
Driver
Output
Driver
Reference
Voltage
Reference
Voltage
MR
Noise Filter
Watchdog
VSS
VSS
WDI
WDI
Watchdog
FIGURE 4-6:
MCP1318 Block Diagram.
FIGURE 4-3:
MCP1316 Block Diagram.
VDD
VDD
Comparator
Comparator
+
+
RST
RST
–
–
Output
Driver
Output
Driver
RST
Reference
Voltage
Reference
Voltage
MR
Noise Filter
Watchdog
VSS
VSS
WDI
WDI
Watchdog
FIGURE 4-7:
MCP1318M Block Diagram.
FIGURE 4-4:
MCP1316M Block Diagram.
VDD
Comparator
+
RST
–
Output
Driver
Reference
Voltage
MR
Noise Filter
Watchdog
VSS
WDI
FIGURE 4-5:
MCP1317 Block Diagram.
DS21985A-page 24
© 2005 Microchip Technology Inc.
MCP131X/2X
VDD
VDD
Comparator
Comparator
+
–
+
–
RST
RST
Output
Driver
Output
Driver
RST
RST
Reference
Voltage
Reference
Voltage
MR
Noise Filter
VSS
VSS
WDI
Watchdog
FIGURE 4-8:
MCP1319 Block Diagram.
FIGURE 4-11:
MCP1321 Block Diagram.
VDD
VDD
Comparator
Comparator
+
+
–
RST
–
Output
Driver
Output
Driver
RST
RST
RST
Reference
Voltage
Reference
Voltage
MR
MR
Noise Filter
Noise Filter
VSS
VSS
FIGURE 4-9:
MCP1319M Block Diagram.
FIGURE 4-12:
MCP1322 Block Diagram.
.
VDD
Comparator
+
–
Output
Driver
RST
VSS
Reference
Voltage
MR
Noise Filter
Watchdog
WDI
FIGURE 4-10:
MCP1320 Block Diagram.
© 2005 Microchip Technology Inc.
DS21985A-page 25
MCP131X/2X
The Reset pin (RST or RST) will be force active if any
of the following occur:
4.1
Reset Voltage Trip Point (VTRIP
Operation
)
• The Manual Reset input (MR) goes low
• The Watchdog Timer times out
• VDD goes below the threshold
• During device power up
The device’s Reset voltage trip point (VTRIP) is selected
when the device is ordered. As the voltage on the
device’s VDD pin is above or below this selected trip
point, the output of the Reset pin (RST/RST) will be
forced to either the inactive or active state.
After the device exits the Reset condition, the delay
circuitry will hold the RST and RST pins active until the
appropriate Reset delay time (tRST) has elapsed.
For the voltage trip point, there is a minimum trip voltage
(VTRIPMIN) and a maximum trip voltage (VTRIPMAX). The
voltage that the device “actually” trips at will be referred
to as VTRIP. The trip voltage is specified for the falling of
the device VDD
.
There is also a hysteresis (VHYS) on the trip point. This
is so that noise on the device voltage (VDD) does not
cause the Reset pin (RST/RST) to “jitter” (change
between driving an active and inactive).
TABLE 4-1:
Device
RESET PIN STATES
State of RST Pin when:
State of RST (3) Pin when:
Ouput Driver
V
VHYS
+
V +
TRIP
VDD
<
VDD
>
VDD
<
VDD >
TRIP
VHYS
VTRIP
VTRIP
MCP1316
MCP1316M
MCP1317
MCP1318
MCP1318M
MCP1319
MCP1319M
MCP1320
MCP1321
MCP1322
L
L
H
—
—
H
—
—
L
Push-pull
H (2)
Open-drain (2)
—
L
—
Push-pull
H
H
L
Push-pull
L
H (2)
H
L
Open-drain (2)
L
H
H
L
Push-pull
L
H (2)
H (1)
H (1)
H (1)
H
L
Open-drain (2)
Open-drain (1)
Open-drain (1)
Open-drain (1)
L
—
H
—
L
L
L
H
L
Note 1: Requires External Pull-up resistor.
2: Has Internal Pull-up resistor.
3: The RST pin output is always push-pull.
DS21985A-page 26
© 2005 Microchip Technology Inc.
MCP131X/2X
4.1.1
POWER-UP/RISING VDD
4.1.2
POWER-DOWN/BROWN-OUTS
As the device VDD rises, the device’s Reset circuit will
remain active until the voltage rises above the “actual”
trip point (VTRIP) plus the hysteresis (VHYS).
As the device powers-down/brown-outs, the voltage
(VDD) falls from a voltage above the devices trip point
(VTRIP). The devices “actual” trip point voltage (VTRIP
)
will be between the minimum trip point (VTRIPMIN) and
the maximum trip point (VTRIPMAX). Once the device
voltage (VDD) goes below this voltage, the Reset pin(s)
will be forced to the active state. There is a hysteresis
on this trip point. This is so that noise on the device volt-
age (VDD) does not cause the Reset pin (RST/RST) to
“jitter” (change between driving an active and inactive).
Figure 4-13 shows a power-up sequence and the
waveform of the RST and RST pins.
As the device powers up, the voltage will start below
the valid operating voltage of the device. At this volt-
age, the Reset output value is not valid. Once the volt-
age is above the minimum operating voltage (1V) and
below the selected VTRIP, the Reset output will be
active.
Figure 4-14 shows the waveform of the RST pin as
determined by the VDD voltage, while Table 4-1 shows
the state of the RST pin.
Once the device voltage rises above the “actual” trip
point (VTRIP) plus the hysteresis (VHYS), the Reset delay
timer (tRST) starts. When the Reset delay timer times
out, the Reset output (RST/RST) is driven inactive.
4.1.2.1
Operation of RST pin with Internal
Pull-Up Resistor
Note:
While the Reset delay timer (tRST) is
active, additional system current is con-
sumed.
Note:
Only the MCP1316M, MCP1318M and
MCP1319M devices have an open-drain
RST output pin with an internal pull-up
resistor.
The internal pull-up resistor has a typical value of
4.7 kΩ. The internal pull-up eliminates the need for an
external resistor.
VTRIP + VHYS
tRST
VTRIPMAX
VTRIPMIN
VDD
1V
To reduce the current consumption of the device, when
the RST pin is driving low, the resistor is disconnected.
VTRIP
RST
RST
FIGURE 4-13:
Reset pin Operation on a
Power-up.
VDD
VTRIP + VHYS
VTRIPMAX
VTRIPMIN
VTRIP
VTRIP
1V
RST
tRST
tRPD
tRST
< 1V is outside the
device specifications
tRPD
FIGURE 4-14:
RST Operation as determined by the VTRIP and VHYS.
© 2005 Microchip Technology Inc.
DS21985A-page 27
MCP131X/2X
Figure 4-15 illustrates when the Reset delay timer
(tRST) is active or inactive.
4.2
Reset Delay Timer (t
)
RST
The Reset delay timer ensures that the MCP131X/2X
device will “hold” the embedded system in Reset until
the system voltage has stabilized. There are several
time out options to better meet the requirements of
different applications. These Reset delay timer time
outs are shown in Table 4-2. The Standard offering time
out is typically 200 ms.
VDD
VTRIP
RST
tRST
The Reset delay timer (tRST) starts after the device volt-
age rises above the “actual” trip point (VTRIP) plus the
hysteresis (VHYS). When the Reset delay timer times
out, the Reset output pin (RST/RST) is driven inactive.
Note:
While the Reset delay timer (tRST) is
active, additional system current is con-
sumed.
Reset
Delay
Timer
Reset Delay
Inactive
Timer Inactive
TABLE 4-2:
RESET DELAY TIMER
TIME OUTS (1)
See Figures 2-12,
2-10 and 2-11
See Figures 2-12,
2-10 and 2-11
tRST
Units
Min
Typ
Max
See Figures 2-15,
2-14 and 2-13
1.0
20
1.4
30
2.0
40
ms
ms
ms
sec
140
1120
↑
200
1.6
280
2.24
↑
FIGURE 4-15:
Waveform.
Reset Power-up Timer
4.2.1
EFFECT OF TEMPERATURE ON
RESET POWER-UP TIMER (TRPU
This is the mini-
mum time that the
Reset delay timer
will “hold” the
Reset pin active
after VDD rises
This is the maxi-
mum time that the
Reset delay timer
will “hold” the
Reset pin active
after VDD rises
)
The Reset delay timer time out period (tRST
)
determines how long the device remains in the Reset
condition. This time out is affected by both the device
VDD and temperature. Typical responses for different
VDD values and temperatures are shown in
Figures 2-33, 2-32 and 2-31.
above
VTRIP + VHYS
above
VTRIP + VHYS
Note 1: Shaded rows are custom ordered time
outs.
DS21985A-page 28
© 2005 Microchip Technology Inc.
MCP131X/2X
4.3
Negative Going VDD Transients
4.4
Manual Reset Input
The minimum pulse width (time) required to cause a
Reset may be an important criteria in the implementa-
tion of a Power-on Reset (POR) circuit. This time is
referred to as transient duration. The MCP131X/2X
devices are designed to reject a level of negative-going
transients (glitches) on the power supply line.
The Manual Reset input pin (MR) allows the Reset pins
(RST/RST) to be manually forced to their active states.
The MR pin has circuitry to filter noise pulses that may
be present on the pin. Figure 4-17 shows a block dia-
gram for using the MCP131X/2X with a push button
switch. To minimize the required external components,
the MR input has an internal pull-up resistor.
Transient duration is the amount of time needed for
these supervisory devices to respond to a drop in VDD
.
A mechanical push button or active logic signal can
drive the MR input.
The transient duration time (tTRAN) is dependant on the
magnitude of VTRIP – VDD (overdrive). Any combination
of duration and overdrive that lies under the dura-
tion/overdrive curve will not generate a Reset signal.
Generally speaking, the transient duration time
decreases with and increases in the VTRIP – VDD volt-
age. Combinations of duration and overdrive that lies
above the duration/overdrive curve are detected as a
brown-out or power-down condition.
Once MR has been low for a time, tMRD (the Manual
Reset delay time), the Reset output pins are forced
active. The Reset output pins will remain in their active
states for the Reset delay timer time out period (tRST
)
Figure 4-18 shows a waveform for the Manual Reset
switch input and the Reset pins output.
+5V
VDD
Figure 4-16 shows a typical transient duration vs.
Reset comparator overdrive, for which the
MCP131X/2X will not generate a Reset pulse. It shows
that the farther below the trip point the transient pulse
goes, the duration of the pulse required to cause a
Reset gets shorter. Figure 4-16 shows the transient
response characteristics for the MCP131X/2X.
MR
MCP13XX
RST
WDI
I/O
PICmicro® MCU
MCLR
Transient immunity can be improved by adding a
bypass capacitor (typically 0.1 μF) as close as possible
to the VDD pin of the MCP131X/2X device.
VSS
FIGURE 4-17:
Watchdog Timer.
Push Button Reset and
5V
V
V
TRIP(MAX)
TRIP(MIN)
V
- V
DD
TRIP(MIN)
(Overdrive)
t
MR
t
TRANS
t
MR
MRD
(Duration)
V
IH
0V
Time (μs)
V
IL
t
RST
FIGURE 4-16:
Example of Typical
Transient Duration Waveform.
RST
RST
The MR input typically ignores input pulses
of 100 ns.
FIGURE 4-18:
MR Input – Push Button.
4.4.1
NOISE FILTER
The noise filter filters out noise spikes (glitches) on the
Manual Reset pin (MR). Noise spikes less than 100 ns
(typical) are filtered.
© 2005 Microchip Technology Inc.
DS21985A-page 29
MCP131X/2X
Figure 4-19 shows a block diagram for using the
MCP131X/2X with a PICmicro® microcontroller (MCU)
and the Watchdog input.
4.5
Watchdog Timer
The purpose of the Watchdog Timer (WDT) is to
increase system reliability. The Watchdog Timer fea-
ture can be used to detect when the Host Controller’s
program flow is not as expected. Since the Watchdog
Timer monitors for activity on the Watchdog Input pin
(WDI). The WDI pin is expected to be strobed within a
given time frame. When this time frame is exceeded,
without an edge transition on the WDI pin, the Reset
pin is driven active to reset the system. This stops the
Host Controller from continuing it’s erratic behavior
(“run-away” code execution).
TABLE 4-3:
WATCHDOG TIMER
PERIODS (1)
tWDT
Units
Min
Typ
Max
4.3
71
6.3
102
1.6
9.3
153
2.4
38.4
↑
ms
ms
1.12
17.9
↑
sec
sec
The Watchdog Timer is external to the main portion of
the control system and monitors the operation of the
system. This feature is enabled by a falling edge on the
WDI pin (after device POR). Monitoring is then done by
requiring the embedded controller to force an edge
transition (falling or rising) on the WDI pin (“pet the
Watchdog”) within a predetermined time frame (TWD).
If the MCP131X/2X does not detect an edge on the
WDI pin within the expected time frame, the
MCP131X/2X device will force the Reset pin active.
25.6
If the time between
WDI edges is less
than this, it
ensures that the
MCP131X/2X
never forces a
reset
If the time
between WDI
edges is greater
than this, it
ensures that the
MCP131X/2X
always forces a
reset
The Watchdog Timer is in the disabled state when:
Note 1: Shaded rows are custom ordered Watch-
dog Timer Periods (tWDT) time outs. For
information on ordering devices with
these tWDT time outs, please contact your
local Microchip sales office. Minimum
purchase volumes are required.
• The Device Powers up
• A POR event occurred
• A WDT event occurred
• A Manual Reset (MR) event occurred
When the Watchdog Timer is in the disabled state, the
WDI pin has an internal smart pull-up resistor enabled.
This pull-up resistor has a typical value of 52 kΩ. This
pull-up resistor holds the WDI signal in the high state,
until it is forced to another state.
+5V
10 kΩ
MCP13XX
+5V
3-Terminal
After the embedded controller has initialized, if the
Watchdog Timer feature is to be used, then the embed-
ded controller can force the WDI pin low (VIL). This also
enables the Watchdog Timer feature and disables the
WDI pull-up resistor. Disabling the pull-up resistor
reduces the device’s current consumption. The pull-up
resistor will remain disconnected until the device has a
power-on, a Reset event occurs, or after the WDT time
out.
V
MCLR
RST
CC
Regulator
®
PICmicro
(example: 0.1
μF
MCU
MCP1700)
I/O
WDI
GND
FIGURE 4-19:
Watchdog Timer.
The software routine that strobes WDI is critical. The
code must be in a section of software that is executed
frequently enough so the time between edge transi-
tions is less than the Watchdog time out period. One
common technique controls the Host Controllers I/O
line from two sections of the program. The software
might set the I/O line high while operating in the Fore-
ground mode and set it low while in the Background or
Interrupt modes. If both modes do not execute cor-
rectly, the Watchdog Timer issues reset pulses.
Once the Watchdog Timer has been enabled, the Host
Contoller must force an edge transition (falling or rising)
on the WDI pin before the minimum Watchdog Timer
time out to ensure that the Watchdog Timer does not
force the Reset pins (RST/RST) to the active state.
If an edge transition does not occur before the maxi-
mum time out occurs, then the MCP131X/2X will force
the Reset pins to their active state.
The MCP131X/2X supports four time outs. The stan-
dard offering devices have a typical Watchdog Timer
period (TWDT) of 1.6 s. Table 4-3 shows the available
Watchdog Timer periods. The tWDT time out is a
function of the device voltage and temperature.
DS21985A-page 30
© 2005 Microchip Technology Inc.
MCP131X/2X
®
5.3
Using in PICmicro
5.0
APPLICATION INFORMATION
Microcontroller, ICSP™
Applications
This section shows application related information that
may be useful for your particular design requirements.
Note:
This operation can only be done using the
device with the Open-Drain RST pin
(MCP1320, MCP1321 and MCP1322).
Devices that have the internal pull-up
resistor are not recommended due to the
current path of the internal pull-up resistor.
5.1
Supply Monitor Noise Sensitivity
The MCP131X/2X devices are optimized for fast
response to negative-going changes in VDD. Systems
with an inordinate amount of electrical noise on VDD
(such as systems using relays) may require a 0.01 μF
or 0.1 μF bypass capacitor to reduce detection sensitiv-
ity. This capacitor should be installed as close to the
MCP131X/2X as possible to keep the capacitor lead
length short.
Figure 5-4 shows the typical application circuit for using
the MCP132X for voltage superviory function when the
PICmicro microcontroller will be programmed via the
In-Circuit Serial Programming™ (ICSP™) feature.
Additional information is available in TB087, “Using
Voltage Supervisors with PICmicro® Microcontroller
Systems which Implement In-Circuit Serial Program-
ming™”, DS91087.
0.1 μF
VDD
MCP131X/2X
Note:
It is recommended that the current into the
RST pin be current limited by a 1 kΩ
resistor.
WDI
RST
RST
MR
VSS
VDD/VPP
FIGURE 5-1:
with Bypass Capacitor.
Typical Application Circuit
0.1 μF
VDD
RPU
VDD
PICmicro®
Microcontroller
MCP132X
5.2
Conventional Voltage Monitoring
MCLR
Reset input)
(Active-Low)
Figure 5-2 and Figure 5-3 show the MCP131X/2X in
conventional voltage monitoring applications.
RST
VSS
1 kΩ
VSS
+
VDD
–
FIGURE 5-4:
Typical Application Circuit
MCP131X/2X
BATLOW
RST
for PICmicro® Microcontroller with the ICSP™
Feature.
VSS
FIGURE 5-2:
Battery Voltage Monitor.
VDD
+
RST
Pwr
Sply
MCP131X/2X
Power Good
–
VSS
FIGURE 5-3:
Power Good Monitor.
© 2005 Microchip Technology Inc.
DS21985A-page 31
MCP131X/2X
5.4
Modifying The Trip Point, V
5.5
MOSFET Low-Drive Protection
TRIP
Although the MCP131X/2X device has a fixed voltage
trip point (VTRIP), it is sometimes necessary to make
custom adjustments. This can be accomplished by
connecting an external resistor divider to the
MCP131X/2X VDD pin. This causes the VSOURCE volt-
age to be at a higher voltage than when the
MCP131X/2X input equals it’s VTRIP voltage
(Figure 5-5).
Low operating power and small physical size make the
MCP131X/2X series ideal for many voltage detector
applications. Figure 5-6 shows a low-voltage gate drive
protection circuit that prevents overheating of the
logic-level MOSFET due to insufficient gate voltage.
When the input signal is below the threshold of the
MCP131X/2X, its output grounds the gate of the
MOSFET.
To maintain detector accuracy, the bleeder current
through the divider should be significantly higher than
the 10 μA maximum operating current required by the
MCP131X/2X. A reasonable value for this bleeder
current is 1 mA (100 times the 10 μA required by the
MCP131X/2X). For example, if VTRIP = 2V and the
desired trip point is 2.5V, the value of R1 + R2 is 2.5 kΩ
(2.5V/1 mA). The value of R1 + R2 can be rounded to
the nearest standard value and plugged into the equa-
tion of Figure 5-5 to calculate values for R1 and R2. 1%
tolerance resistors are recommended.
VTRIP
270Ω
VDD
VDD
RL
MTP3055EL
RST
MCP131X/2X
VSS
VSOURCE
FIGURE 5-6:
Protection.
MOSFET Low-Drive
R2
VDD
5.6
Low-Power Applications
RST
MCP131X/2X
or RST
In some low-power applications, the longer that the
microcontroller (such as a PICmicro MCU) can be in
the “Sleep mode”, the lower the average system cur-
rent consumption will be.
R1
VSS
The WDT feature can be used to “wake-up” the PICmicro
MCU at a regular interval to service the required tasks
before returning to sleep. This “wake-up” occurs after the
PICmicro MCU detects a MCLR reset during Sleep mode
(for mid-range family; POR = ‘1’, BOR = ‘1’, TO = ‘1’ and
PD = ‘1’).
R
1
-------------------
V
×
= V
SOURCE
TRIP
R
+ R
1
2
Where:
VSOURCE
VTRIP
=
=
Voltage to be monitored
Threshold Voltage setting
Note:
In this example, VSOURCE must be
greater than (VTRIP
)
FIGURE 5-5:
Modify Trip-Point using
External Resistor Divider.
DS21985A-page 32
© 2005 Microchip Technology Inc.
MCP131X/2X
5.7
Controllers and Processors With
Bidirectional I/O Pins
5.8
RESET Signal Integrity During
Power-Down
Some microcontrollers have bidirectional Reset pins.
Depending on the current drive capability of the control-
ler pin, an indeterminate logic level may result if there
is a logic conflict. This can be avoided by adding a
4.7 kΩ resistor in series with the output of the
MCP131X/2X (Figure 5-7). If there are other compo-
nents in the system that require a Reset signal, they
should be buffered so as not to load the Reset line. If
the other components are required to follow the Reset
I/O of the microcontroller, the buffer should be con-
nected as shown with the solid line.
The MCP131X/2X Reset output is valid to VDD = 1.0V.
Below this 1.0V, the output becomes an "open circuit"
and does not sink or source current. This means
CMOS logic inputs to the microcontroller will be floating
at an undetermined voltage. Most digital systems are
completely shut down well above this voltage.
However, in situations where the Reset signal must be
maintained valid to VDD = 0V, external circuitry is
required.
For devices where the Reset signal is active-low, a
pull-down resistor must be connected from the
MCP131X/2X Reset pin(s) to ground to discharge stray
capacitances and hold the output low (Figure 5-8).
Buffered Reset
To Other System
Components
Buffer
Similarly for devices where the Reset signal is
active-high, a pull-up resistor to VDD is required to
ensure a valid high Reset signal for VDD below 1.0V.
VDD
This resistor value, though not critical, should be
chosen such that it does not appreciably load the Reset
pin(s) under normal operation (100 kΩ will be suitable
for most applications).
PICmicro®
MCU
MCP13XX
4.7 kΩ
MCLR
GND
RST
GND
VDD
FIGURE 5-7:
MCP131X/2X Push-Pull outputs to a
Bidirectional Reset I/O.
Interfacing the
VDD
MCP13XX
RST
R1
100 kΩ
GND
FIGURE 5-8:
Ensuring a valid active-low
Reset pin output state as VDD approaches 0V.
© 2005 Microchip Technology Inc.
DS21985A-page 33
MCP131X/2X
6.0
STANDARD DEVICE
OFFERINGS
7.0
CUSTOM CONFIGURATIONS
Table 7-2 shows the codes that specify the desired
Reset time out (tRST) and Watchdog Timer time out
(tWDT) for custom devices
Table 7-1 shows the standard devices that are avail-
able and their respective configuration. The configura-
tion includes the:
The voltage trip point (VTRIP) is specified by the two
digits of the desired typical trip point voltage. As an
example, if the desired VTRIP selection has a typical
VTRIP of 2.7V, the code is 27.
• Voltage Trip Point (VTRIP
• Reset Time Out (tRST
• Watchdog Time Out (tWDT
)
)
)
Table 7-1 also shows the order number for that given
device configuration.
TABLE 7-1:
Device
STANDARD VERSIONS
Reset Time Out (ms)
Watchdog Time Out (s)
Reset
Threshold (V)
Minimum Typical
Minimum
Typical
Order Number
MCP1316
MCP1316
MCP1316M
MCP1316M
MCP1317
MCP1317
MCP1318
MCP1318
MCP1318M
MCP1318M
MCP1319
MCP1319
MCP1319M
MCP1319M
MCP1320
MCP1320
MCP1321
MCP1321
MCP1322
MCP1322
2.90
4.60
2.90
4.60
2.90
4.60
2.90
4.60
2.90
4.60
2.90
4.60
2.90
4.60
2.90
4.60
2.90
4.60
2.90
4.60
140
140
140
140
140
140
140
140
140
140
140
140
140
140
140
140
140
140
140
140
200
200
200
200
200
200
200
200
200
200
200
200
200
200
200
200
200
200
200
200
1.12
1.12
1.12
1.12
1.12
1.12
1.12
1.12
1.12
1.12
—
1.6
1.6
1.6
1.6
1.6
1.6
1.6
1.6
1.6
1.6
—
MCP1316T-29LE/OT
MCP1316T-46LE/OT
MCP1316MT-29LE/OT
MCP1316MT-46LE/OT
MCP1317T-29LE/OT
MCP1317T-46LE/OT
MCP1318T-29LE/OT
MCP1318T-46LE/OT
MCP1318MT-29LE/OT
MCP1318MT-46LE/OT
MCP1319T-29LE/OT
MCP1319T-46LE/OT
MCP1319MT-29LE/OT
MCP1319MT-46LE/OT
MCP1320T-29LE/OT
MCP1320T-46LE/OT
MCP1321T-29LE/OT
MCP1321T-46LE/OT
MCP1322T-29LE/OT
MCP1322T-46LE/OT
—
—
—
—
—
—
1.12
1.12
1.12
1.12
—
1.6
1.6
1.6
1.6
—
—
—
TABLE 7-2:
DELAY TIME OUT ORDERING CODES
Typical Delay Time (ms)
Typical Delay Time (ms)
Code
Reset
1.6
WDT
6.3
Comment
Note 1
Code
Reset
200.0
200.0
200.0
WDT
6.3
Comment
Note 1
A
B
C
J
K
L
1.6
102.0
1600.0
Note 1
102.0
1600.0
Note 1
1.6
Note 1
Delay timings for standard
device offerings
D
E
F
1.6
25600.0 Note 1
M
N
P
200.0
1600.0
1600.0
1600.0
1600.0
25600.0 Note 1
30.0
30.0
30.0
30.0
6.3
Note 1
Note 1
Note 1
6.3
Note 1
Note 1
Note 1
102.0
1600.0
102.0
1600.0
G
H
Q
R
25600.0 Note 1
25600.0 Note 1
Note 1: This delay timing combination is not the standard offering. For information on ordering devices with these
delay times, contact your local Microchip sales office. Minimum purchase volumes are required.
DS21985A-page 34
© 2005 Microchip Technology Inc.
MCP131X/2X
8.0
8.1
DEVELOPMENT TOOLS
Evaluation/Demonstration Boards
TThe SOT-23-5/6 Evaluation Board (VSUPEV2) can
be used to evaluate the characteristics of the
MCP131X/2X devices.
This blank PCB has footprints for:
• Pull-up Resistor
• Pull-down Resistor
• Loading Capacitor
• In-line Resistor
There is also a power supply filtering capacitor.
For evaluating the MCP131X/2X devices, the selected
device should be installed into the Option A footprint.
FIGURE 1:
SOT-23-5/6 Voltage
Supervisor Evaluation Board (VSUPEV2).
This board may be purchased directly from the
Microchip web site at www.microchip.com.
© 2005 Microchip Technology Inc.
DS21985A-page 35
MCP131X/2X
9.0
9.1
PACKAGING INFORMATION
Package Marking Information
5-Pin SOT-23
Example:
Part Number
SOT-23
MCP1316T-29LE/OT
MCP1316MT-29LE/OT
MCP1317T-29LE/OT
MCP1318T-29LE/OT
MCP1318MT-29LE/OT
MCP1319T-29LE/OT
MCP1319MT-29LE/OT
MCP1320T-29LE/OT
MCP1321T-29LE/OT
MCP1322T-29LE/OT
MCP1316T-46LE/OT
MCP1316MT-46LE/OT
MCP1317T-46LE/OT
MCP1318T-46LE/OT
MCP1318MT-46LE/OT
MCP1319T-46LE/OT
MCP1319MT-46LE/OT
MCP1320T-46LE/OT
MCP1321T-46LE/OT
MCP1322T-46LE/OT
QANN
QBNN
QCNN
QDNN
QENN
QFNN
QGNN
QHNN
QJNN
QKNN
QLNN
QMNN
QPNN
QQNN
QRNN
QSNN
QTNN
QUNN
QVNN
QWNN
XXNN
QANN
Legend: XX...X Customer-specific information
Y
YY
WW
NNN
Year code (last digit of calendar year)
Year code (last 2 digits of calendar year)
Week code (week of January 1 is week ‘01’)
Alphanumeric traceability code
e
3
Pb-free JEDEC designator for Matte Tin (Sn)
*
This package is Pb-free. The Pb-free JEDEC designator (
can be found on the outer packaging for this package.
)
e3
Note: In the event the full Microchip part number cannot be marked on one line, it will
be carried over to the next line, thus limiting the number of available
characters for customer-specific information.
DS21985A-page 36
© 2005 Microchip Technology Inc.
MCP131X/2X
5-Lead Plastic Small Outline Transistor (OT) (SOT-23)
E
E1
p
B
p1
D
n
1
α
c
A
A2
φ
L
A1
β
Units
INCHES
*
MILLIMETERS
Dimension Limits
MIN
NOM
MAX
MIN
NOM
MAX
n
p
Number of Pins
Pitch
5
5
.038
0.95
p1
Outside lead pitch (basic)
Overall Height
.075
.046
.043
.003
.110
.064
.116
.018
1.90
1.18
1.10
0.08
2.80
1.63
2.95
0.45
A
A2
A1
E
.035
.057
0.90
1.45
Molded Package Thickness
Standoff
.035
.000
.102
.059
.110
.014
.051
.006
.118
.069
.122
.022
10
0.90
0.00
2.60
1.50
2.80
0.35
1.30
0.15
3.00
1.75
3.10
0.55
Overall Width
Molded Package Width
Overall Length
E1
D
Foot Length
L
f
Foot Angle
0
5
0
5
10
c
Lead Thickness
Lead Width
.004
.014
.006
.017
.008
.020
10
0.09
0.35
0.15
0.43
0.20
0.50
B
a
Mold Draft Angle Top
Mold Draft Angle Bottom
0
0
5
5
0
5
5
10
10
b
10
0
*
Controlling Parameter
Notes:
Dimensions D and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not exceed .005" (0.127mm) per side.
EIAJ Equivalent: SC-74A
Revised 09-12-05
Drawing No. C04-091
© 2005 Microchip Technology Inc.
DS21985A-page 37
MCP131X/2X
9.2
Product Tape and Reel Specifications
FIGURE 9-1:
EMBOSSED CARRIER DIMENSIONS (8 MM TAPE ONLY)
Top
Cover
Tape
A
0
W
B
K
0
0
P
TABLE 1:
CARRIER TAPE/CAVITY DIMENSIONS
Carrier
Cavity
Dimensions
Output
Quantity
Units
Reel
Diameter in
mm
Dimensions
Case
Package
Outline
Type
W
P
A0
B0
mm
K0
mm
mm
mm
mm
OT
SOT-23
3L
8
4
3.2
3.2
1.4
3000
180
FIGURE 9-2:
5-LEAD SOT-23 DEVICE TAPE AND REEL SPECIFICATIONS
Device
Marking
User Direction of Feed
Pin 1
W, Width
of Carrier
Tape
Pin 1
P, Pitch
Standard Reel Component Orientation
Reverse Reel Component Orientation
DS21985A-page 38
© 2005 Microchip Technology Inc.
MCP131X/2X
APPENDIX A: REVISION HISTORY
Revision A (November 2005)
• Original Release of this Document.
© 2005 Microchip Technology Inc.
DS21985A-page 39
MCP131X/2X
NOTES:
DS21985A-page 40
© 2005 Microchip Technology Inc.
MCP131X/2X
PRODUCT IDENTIFICATION SYSTEM
To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office.
Examples:
X
/
PART NO.
Device
X
XX
X
XX
a)
b)
c)
d)
MCP1316T-29LE/OT: 5-Lead SOT-23-5
Temperature Package
Range
Tape/Reel
Option
Time Out
Options
VTRIP
Options
MCP1316T-46LE/OT: 5-Lead SOT-23-5
MCP1316MT-29LE/OT:5-Lead SOT-23-5
MCP1316MT-46LE/OT:5-Lead SOT-23-5
Device:
MCP1316T: MicroPower Voltage Detector
(Tape and Reel)
a)
b)
MCP1317T-29LE/OT: 5-Lead SOT-23-5
MCP1317T-46LE/OT: 5-Lead SOT-23-5
MCP1316MT: MicroPower Voltage Detector
(Tape and Reel)
MCP1317T: MicroPower Voltage Detector
(Tape and Reel)
MCP1318T: MicroPower Voltage Detector
(Tape and Reel)
MCP1318MT: MicroPower Voltage Detector
(Tape and Reel)
MCP1319T: MicroPower Voltage Detector
(Tape and Reel)
a)
b)
c)
d)
MCP1318T-29LE/OT: 5-Lead SOT-23-5
MCP1318MT-29LE/OT:5-Lead SOT-23-5
MCP1318T-46LE/OT: 5-Lead SOT-23-5
MCP1318MT-46LE/OT:5-Lead SOT-23-5
MCP1319MT: MicroPower Voltage Detector
(Tape and Reel)
MCP1320T: MicroPower Voltage Detector
(Tape and Reel)
MCP1321T: MicroPower Voltage Detector
(Tape and Reel)
a)
b)
c)
d)
MCP1319T-29LE/OT: 5-Lead SOT-23-5
MCP1318MT-29LE/OT:5-Lead SOT-23-5
MCP1319T-46LE/OT: 5-Lead SOT-23-5
MCP1318MT-46LE/OT:5-Lead SOT-23-5
MCP1322T: MicroPower Voltage Detector
(Tape and Reel)
a)
b)
MCP1320T-29LE/OT: 5-Lead SOT-23-5
MCP1320T-46LE/OT: 5-Lead SOT-23-5
VTRIP Options:
(Note 1)
29
46
=
=
2.90V
4.60V
a)
b)
MCP1321T-29LE/OT: 5-Lead SOT-23-5
MCP1321T-46LE/OT: 5-Lead SOT-23-5
Time Out Options:
(Note 1)
L
=
=
=
tRST = 200ms (typ),
tWDT = 1.6sec (typ)
a)
b)
MCP1322T-29LE/OT: 5-Lead SOT-23-5
MCP1322T-46LE/OT: 5-Lead SOT-23-5
Temperature Range:
Package:
E
-40°C to +125°C
(Except for trip points 2.4V and below)
OT
SOT-23, 5-lead
Note 1:
Custom ordered voltage trip points and time outs available. Please
contact your local Microchip sales office for additional information.
Minimum purchase volumes are required.
© 2005 Microchip Technology Inc.
DS21985A-page 41
MCP131X/2X
NOTES:
DS21985A-page 42
© 2005 Microchip Technology Inc.
Note the following details of the code protection feature on Microchip devices:
•
Microchip products meet the specification contained in their particular Microchip Data Sheet.
•
Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the
intended manner and under normal conditions.
•
There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our
knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data
Sheets. Most likely, the person doing so is engaged in theft of intellectual property.
•
•
Microchip is willing to work with the customer who is concerned about the integrity of their code.
Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not
mean that we are guaranteeing the product as “unbreakable.”
Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our
products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts
allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.
Information contained in this publication regarding device
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and may be superseded by updates. It is your responsibility to
ensure that your application meets with your specifications.
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RELATED TO THE INFORMATION, INCLUDING BUT NOT
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Trademarks
The Microchip name and logo, the Microchip logo, Accuron,
dsPIC, KEELOQ, microID, MPLAB, PIC, PICmicro,
PICSTART, PRO MATE, PowerSmart, rfPIC, and
SmartShunt are registered trademarks of Microchip
Technology Incorporated in the U.S.A. and other countries.
AmpLab, FilterLab, Migratable Memory, MXDEV, MXLAB,
PICMASTER, SEEVAL, SmartSensor and The Embedded
Control Solutions Company are registered trademarks of
Microchip Technology Incorporated in the U.S.A.
Analog-for-the-Digital Age, Application Maestro, dsPICDEM,
dsPICDEM.net, dsPICworks, ECAN, ECONOMONITOR,
FanSense, FlexROM, fuzzyLAB, In-Circuit Serial
Programming, ICSP, ICEPIC, Linear Active Thermistor,
MPASM, MPLIB, MPLINK, MPSIM, PICkit, PICDEM,
PICDEM.net, PICLAB, PICtail, PowerCal, PowerInfo,
PowerMate, PowerTool, rfLAB, rfPICDEM, Select Mode,
Smart Serial, SmartTel, Total Endurance and WiperLock are
trademarks of Microchip Technology Incorporated in the
U.S.A. and other countries.
SQTP is a service mark of Microchip Technology Incorporated
in the U.S.A.
All other trademarks mentioned herein are property of their
respective companies.
© 2005, Microchip Technology Incorporated, Printed in the
U.S.A., All Rights Reserved.
Printed on recycled paper.
Microchip received ISO/TS-16949:2002 quality system certification for
its worldwide headquarters, design and wafer fabrication facilities in
Chandler and Tempe, Arizona and Mountain View, California in
October 2003. The Company’s quality system processes and
procedures are for its PICmicro® 8-bit MCUs, KEELOQ® code hopping
devices, Serial EEPROMs, microperipherals, nonvolatile memory and
analog products. In addition, Microchip’s quality system for the design
and manufacture of development systems is ISO 9001:2000 certified.
© 2005 Microchip Technology Inc.
DS21985A-page 43
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10/31/05
DS21985A-page 44
© 2005 Microchip Technology Inc.
相关型号:
MCP1320T-25LE/OT
ACTIVE LOW P-P WITH WDI=1.6S, RESET DELAY=200MS, VTRPD-2.5V, -40C to +125C, 5-SOT-23, T/R
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