AP1704CTW [ICT]
Power Supply Support Circuit, Fixed, 1 Channel, PDSO3, LEAD FREE, TSOT-23, 3 PIN;
| 型号： | AP1704CTW |
| 厂家： | 
InnoChips Technology |
| 描述： | Power Supply Support Circuit, Fixed, 1 Channel, PDSO3, LEAD FREE, TSOT-23, 3 PIN 光电二极管 |
| 文件： | 总9页 (文件大小：181K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
AP1701/2/3/4
3-Pin Microprocessor Reset Circuits
Features
General Description
- Precision Monitoring of +2.5V, +3V, +3.3V, and
+5V
The AP1701/2/3/4 are used for microprocessor (µP)
supervisory circuits to monitor the power supplies in
µP and digital systems. They provide excellent
circuit reliability and low cost by eliminating external
components and adjustments when used with +5V,
+3.3V, +3.0V powered circuits.
Power-Supply Voltages
- Fully Specified Over Temperature
- Available in Three Output Configurations
- Push-Pull RESET Low Output (AP1701/3)
- Push-Pull RESET High Output (AP1702/4)
- 200ms min Power-On Reset Pulse Width
- 20µA Supply Current (Typ.)
These circuits perform a single function: they assert
a reset signal whenever the VCC supply voltage
declines below a preset threshold, keeping it
asserted for at least 240ms after VCC has risen
above the reset threshold. Reset thresholds
suitable for operation with a variety of supply
voltages are available. The AP1701/2/3/4 have
push pull outputs. The AP1701/3 have an active low
RESET output, while the AP1702/4 has an active
high RESET output. The reset comparator is
designed to ignore fast transients on VCC, and the
outputs are guaranteed to be in the correct logic
state for VCC down to 1V. Low supply current
makes the AP1701/2/3/4 ideal for use in portable
equipment. The AP1701/2/3/4 is available in a 3-pin
SOT23,TSOT23 package.
- Guaranteed Reset Valid to VCC = +1V
- Power Supply Transient Immunity
- No External Components
- 3-pin SOT23, TSOT23, Pb-Free Package
Applications
- Computers
- Controllers
- Intelligent Instruments
- Critical µP and µC Power Monitoring
- Portable/Battery Powered Equipment
- Automotive
Pin Assignments
Pin Descriptions
(Top View)
Name
Description
GND
Ground
1
2
GND
Reset output pin
L: for AP1701/3
H: for AP1702/4
RESET
AP1701
AP1702
3
VCC
(RESET)
VCC
Operating voltage input
RESET (RESET)
SOT-23/TSOT23
(Top View)
1
2
RESET (RESET)
GND
AP1703
AP1704
3
VCC
SOT-23/TSOT23
This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of
this product. No rights under any patent accompany the sale of the product.
Rev. 1.4 Nov. 10, 2005
1/9
AP1701/2/3/4
3-Pin Microprocessor Reset Circuits
Ordering Information
AP170X X X
Enable
Voltage
Package
A: 4.63
B: 4.38
C: 4.00
D: 3.08
E: 2.93
F: 2.63
G: 2.25
W:SOT23
TW:TSOT23
1: Active-Low
2: Active-High
3: Active-Low
4: Active-High
Absolute Maximum Ratings
Symbol
VCC
VRESET
ICC
Parameter
Terminal Voltage (with respect to GND)
Rating
-0.3 to +6.0
-0.3 to (VCC + 0.3)
Unit
V
V
mA
mA
RESET, RESET (push-pull)
Input Current, VCC
20
20
IO
Output Current, RESET, RESET
Continuous Power Dissipation (TA = +70°C),
de-rate 4mW/°C above +70°C
PD
320
mW
TOP
TST
TLEAD
Operating Temperature Range
Storage Temperature Range
Lead Temperature (soldering, 10s)
-40 to +105
-65 to +150
+300
°C
°C
°C
This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of
this product. No rights under any patent accompany the sale of the product.
Rev. 1.4 Nov. 10, 2005
2/9
AP1701/2/3/4
3-Pin Microprocessor Reset Circuits
Electrical Characteristics (TA=25ºC)
Symbol
Parameter
Conditions
Min.
1.0
Typ.
Max.
Unit
VCC
VCC Range
TA = 0oC to +70oC
5.5
V
ICC
Supply Current
VTH+1.0V
20
30
µA
AP1701/2/3/4A
AP1701/2/3/4B
AP1701/2/3/4C
AP1701/2/3/4D
AP1701/2/3/4E
AP1701/2/3/4F
AP1701/2/3/4G
4.54
4.29
3.92
3.02
2.87
2.57
2.20
4.63
4.38
4.00
3.08
2.93
2.63
2.25
4.72
4.47
4.08
3.14
2.99
2.68
2.30
Reset Threshold
TA=25ºC
V
VTH
Reset Threshold
Tempco
30
ppm/oC
µs
TS
Set-up Time
Reset Active
Timeout Period
VCC = 0 to (VTH – 100mV)
TA = 0oC to +70oC
100
100
TDELAY
240
600
ms
VCC = VTH min, ISINK = 1.2mA, AP1701/3
VCC = VTH min, ISINK = 3.2mA
0.3
0.4
0.3
RESET Output
Voltage Low
VOL
VOH
V
V
V
CC > 1.0V, ISINK = 50uA
VCC
AP1701/3
VCC > VTH max, ISOURCE = 800uA
VCC = VTH max, ISINK = 1.2mA, AP1702/4
> VTH max, ISOURCE = 500uA,
0.8VCC
RESET Output
Voltage-High
VCC –1.5
RESET Output
0.3
0.4
VOL
VOH
V
V
Voltage-Low
VCC = VTH max, ISINK = 3.2mA
RESET Output
Voltage-High
1.8V < VCC < VTH min, ISOURCE = 150uA,
AP1702/4
0.8 VCC
Application Circuit
VCC
VCC
VCC
Microprocessor
AP170X
RESET
INPUT
RESET
(RESET)
GND
GND
Anachip Corp.
www.anachip.com.tw
Rev. 1.4 Nov. 10, 2005
3/9
AP1701/2/3/4
3-Pin Microprocessor Reset Circuits
Function Description
When VCC falls below 1V, the AP1701/3 RESET
output no longer sinks current—it becomes an open
circuit. Therefore, high-impedance CMOS logic
inputs connected to RESET can drift to
undetermined voltages.
This presents no problem in most applications since
most µP and other circuitry is inoperative with VCC
below 1V. However, in applications where RESET
must be valid down to 0V, adding a pull down
resistor to RESET causes any stray leakage
currents to flow to ground, holding RESET low.
R1’s value is not critical; 100k is large enough not
to load RESET and small enough to pull RESET
to ground. For the AP1702/4 if RESET is required to
remain valid for VCC < 1V.
A microprocessor’s (µP’s) reset input starts the µP
in a known state. The AP1701/2/3/4 assert reset to
prevent code-execution errors during power-up,
power-down, or brownout conditions. They assert a
reset signal whenever the VCC supply voltage
declines below a preset threshold, keeping it
asserted for at least 240ms after VCC has risen
above the reset threshold. The AP1701/2/3/4 have
a push-pull output stage.
Applications Information
Negative-Going VCC Transients
In addition to issuing a reset to the µP during
power-up, power-down, and brownout conditions,
the AP1701/2/3/4 are relatively immune to
short-duration negative-going VCC transients
(glitches).
The AP1701/2/3/4 do not generate a reset pulse.
The graph was generated using a negative going
pulse applied to VCC, starting 0.5V above the
actual reset threshold and ending below it by the
magnitude indicated (reset comparator overdrive).
The graph indicates the maximum pulse width a
negative going VCC transient can have without
causing a reset pulse. As the magnitude of the
transient increases (goes farther below the reset
threshold), the maximum allowable pulse width
decreases. Typically, a VCC transient that goes
100mV below the reset threshold and lasts 100µs
or less will not cause a reset pulse. A 0.1µF bypass
capacitor mounted as close as possible to the VCC
pin provides additional transient immunity.
Benefits of Highly Accurate Reset Threshold
Most µP supervisor ICs have reset threshold
voltages between 5% and 10% below the value of
nominal sup-ply voltages. This ensures a reset will
not occur within 5% of the nominal supply, but will
occur when the supply is 10% below nominal.
When using ICs rated at only the nominal supply
±5%, this leaves a zone of uncertainty where the
supply is between 5% and 10% low, and where the
reset may or may not be asserted.
Ensuring a Valid Reset Output
Down to VCC = 0
RESET is guaranteed to be a logic low for VCC >
1V. Once VCC exceeds the reset threshold, an
internal timer keeps RESET low for the reset
timeout period; after this interval, RESET goes
high. If a brownout condition occurs (VCC dips
below the reset threshold), RESET goes low. Any
time VCC goes below the reset threshold, the
internal timer resets to zero, and RESET goes low.
The internal timer starts after VCC returns above
the reset threshold, and RESET remains low for
the reset timeout period.
Anachip Corp.
www.anachip.com.tw
Rev. 1.4 Nov. 10, 2005
4/9
AP1701/2/3/4
3-Pin Microprocessor Reset Circuits
Function Block
Driver
Delay Circuit
RESET
/ RESET
V
REF
Performance Characteristics
Threshold
2.928
24
20
16
2.926
2.924
2.922
Iq
12
8
4
2.92
-40
0
80 90
-30 -20 -10
0
10
30 40 50 60 70
20 Temp
-50 -40 -30 -20 -10 0 10 2T0 e30m4p0 (50 C60 7)0 80 90 100 110 120
Iq v.s Temp
Threshold v.s. Temp
Anachip Corp.
www.anachip.com.tw
Rev. 1.4 Nov. 10, 2005
5/8
AP1701/2/3/4
3-Pin Microprocessor Reset Circuits
Timing Diagram
VTH
VCC
TDELAY
TDELAY
Active Low
TS
Active High
TDELAY
TDELAY
Giltch Immunity
3500
3000
2500
2000
1500
1000
500
3000
900
270
140
90
70
58
50
50
48
48
0
0
100 200 300 400 500 600 700 800 900 1000 1100
RESET COMPARATOR OVERDRIVE(mV)
Anachip Corp.
www.anachip.com.tw
Rev. 1.4 Nov. 10, 2005
6/9
AP1701/2/3/4
3-Pin Microprocessor Reset Circuits
Marking Information
(Top View)
3
XX : Identification code
XX Y M X
(See Appendix)
: Year: 0-9
: Month: A~L
Y
M
1
2
SOT23-3L/TSOT23-3L
Appendix
Part Number
Identification
Identification
Part Number
Code
EA
Code
EG
EH
EI
AP1701A
AP1701B
AP1701C
AP1701D
AP1701E
AP1701F
AP1701G
AP1703A
AP1703B
AP1703C
AP1703D
AP1703E
AP1703F
AP1703G
EB
EC
ED
EE
EJ
EK
EL
EF
W1
W3
AP1702A
AP1702B
AP1702C
AP1702D
AP1702E
AP1702F
AP1702G
E0
E2
E3
E4
E5
E6
W2
AP1704A
AP1704B
AP1704C
AP1704D
AP1704E
AP1704F
AP1704G
E7
E8
E9
EM
EN
EP
W4
Anachip Corp.
www.anachip.com.tw
Rev. 1.4 Nov. 10, 2005
7/9
AP1701/2/3/4
3-Pin Microprocessor Reset Circuits
Package Information
(1) Package Type: SOT23-3L
e
D
L
b
Dimensions In Millimeters
Dimensions In Inches
Symbol
Min.
Nom.
Max.
Min.
Nom.
Max.
A
A1
A2
b
1.00
0.00
1.00
0.35
0.10
2.70
1.40
1.70
2.40
0.30
1.20
1.40
0.10
1.30
0.50
0.25
3.10
1.80
2.30
3.00
0.55
0.039
0.000
0.039
0.014
0.004
0.106
0.055
0.067
0.094
0.012
0.047
0.055
0.004
0.051
0.020
0.010
0.122
0.071
0.091
0.118
0.022
-
-
1.15
-
0.045
-
C
0.175
2.90
1.60
2.00
2.70
-
0.007
0.114
0.063
0.079
0.106
-
D
E
e
HE
L
Anachip Corp.
www.anachip.com.tw
Rev. 1.4 Nov. 10, 2005
8/9
AP1701/2/3/4
3-Pin Microprocessor Reset Circuits
Package Information (Continued)
(2) Package Type: TSOT23-3L
θ
D
R
e
b
C
L2
e1
2
θ
y
4xθ1
Dimensions In Millimeters
Dimensions In Inches
Symbol
Min.
0.75
0.00
0.70
0.35
0.10
2.80
2.60
1.50
Nom.
Max.
0.90
0.10
0.80
0.51
0.25
3.00
3.00
1.70
Min.
0.030
0.000
0.028
0.014
0.004
0.110
0.102
0.059
Nom.
Max.
0.035
0.004
0.031
0.020
0.010
0.118
0.118
0.067
A
A1
A2
b
C
D
E
E1
e
e1
L
-
-
-
-
0.030
-
0.75
-
-
2.90
2.80
1.60
-
0.114
0.110
0.063
0.037
0.075
-
0.95 BSC.
1.90 BSC.
0.37
-
-
0.015
-
L1
L2
y
R
θ
0.60 REF.
0.25 BSC.
0.024
0.010
-
-
-
-
-
0.10
-
-
0.004
0.10
0.004
-
-
-
0o
8o
0o
8o
θ1
θ2
7o NOM.
5o NOM.
7o NOM.
5o NOM.
Anachip Corp.
www.anachip.com.tw
Rev. 1.4 Nov. 10, 2005
9/9
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