MAX6328XR27-T [MAXIM]
3-Pin, Ultra-Low-Power SC70/SOT レP Reset Circuits; 3引脚，超低功耗SC70 / SOT μP复位电路
| 型号： | MAX6328XR27-T |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | 3-Pin, Ultra-Low-Power SC70/SOT レP Reset Circuits |
| 文件： | 总8页 (文件大小：132K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-1294; Rev 3; 1/00
3-Pin, Ultra-Low-Power SC70/SOT
µP Reset Circuits
General Description
Features
The MAX6326/MAX6327/MAX6328/MAX6346/MAX6347/
MAX6348 microprocessor (µP) supervisory circuits moni-
tor the power supplies in µP and digital systems. These
devices provide excellent circuit reliability and low cost
by eliminating external components and adjustments
when used with 2.5V, 3V, 3.3V, and 5V powered circuits.
ꢀ Ultra-Low 1µA (max) Supply Current
(MAX6326/MAX6327/MAX6328)
ꢀ Precision Monitoring of 2.5V, 3V, 3.3V, and 5V
Power-Supply Voltages
ꢀ Reset Thresholds Available from 2.2V to 4.63V
ꢀ Fully Specified Over Temperature
ꢀ 100ms (min) Power-On Reset Pulse Width
ꢀ Low Cost
These circuits perform a single function: they assert a
reset signal whenever the V
supply voltage declines
CC
below a preset threshold, keeping it asserted for at least
100ms after V has risen above the reset threshold.
CC
ꢀ Available in Three Versions: Push-Pull RESET,
Push-Pull RESET, and Open-Drain RESET
The only difference between the devices is their output.
The MAX6326/MAX6346 (push-pull) and MAX6328/
MAX6348 (open-drain) have an active-low reset output.
The MAX6327/MAX6347 have an active-high push-pull
reset output. All of these parts are guaranteed to be in
ꢀ Power-Supply Transient Immunity
ꢀ No External Components
ꢀ 3-Pin SC70/SOT23 Packages
the correct state for V
down to 1V. The reset compara-
CC
tor is designed to ignore fast transients on V . Reset
ꢀ Pin Compatible with MAX803/MAX809/MAX810
CC
thresholds are factory-trimmable between 2.2V and
4.63V, in approximately 100mV increments. Twenty-one
standard versions are available. Contact the factory for
availability of nonstandard versions.
Ordering Information
†
PART
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
3 SC70-3
Ultra-low supply currents (1µA max for the MAX6326/
MAX6327/MAX6328) make these parts ideal for use in
portable equipment. All six devices are available in
space-saving SOT23 and SC70 packages.
MAX6326XR_ _-T
MAX6326UR_ _-T
MAX6327XR_ _-T
MAX6327UR_ _-T
MAX6328XR_ _-T
MAX6328UR_ _-T
MAX6346XR_ _-T
MAX6346UR_ _-T
MAX6347XR_ _-T
MAX6347UR_ _-T
MAX6348XR_ _-T
MAX6348UR_ _-T
3 SOT23-3
3 SC70-3
3 SOT23-3
3 SC70-3
Applications
Intelligent Instruments
3 SOT23-3
3 SC70-3
Computers
Controllers
3 SOT23-3
3 SC70-3
Automotive
Critical µP and µC
Power Monitoring
Portable/Battery-Powered
Equipment
3 SOT23-3
3 SC70-3
3 SOT23-3
Pin Configuration
†The MAX6326/MAX6327/MAX6328/MAX6346/MAX6347/
MAX6348 are available in factory-set V reset thresholds from
CC
2.2V to 4.63V, in approximately 0.1V increments. Choose the
desired reset-threshold suffix from Table 1 and insert it in the
blank spaces following “R.” There are 21 standard versions with
a required order increment of 2500 pieces. Sample stock is gen-
erally held on the standard versions only (see the Selector
Guide). Required order increment is 10,000 pieces for nonstan-
dard versions (Table 2). Contact factory for availability. All
devices available in tape-and-reel only.
TOP VIEW
GND
1
MAX6326
MAX6327
MAX6328
MAX6346
MAX6347
MAX6348
3
V
CC
Selector Guide appears at end of data sheet.
(RESET) RESET
2
SOT23-3/SC70-3
( ) ARE FOR THE MAX6327/MAX6347.
________________________________________________________________ Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
3-Pin, Ultra-Low-Power SC70/SOT
µP Reset Circuits
ABSOLUTE MAXIMUM RATINGS
Terminal Voltage (with respect to GND)
Continuous Power Dissipation (T = +70°C)
A
V
...........................................................................-0.3V to +6V
3-Pin SC70 (derate 2.7mW/°C above +70°C)...............174mW
3-Pin SOT23 (derate 4mW/°C above +70°C)................320mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
CC
RESET, RESET (push-pull) .........................-0.3V to (V
RESET (open drain)..................................................-0.3V to +6V
Input Current (V ).............................................................20mA
Output Current (RESET, RESET).........................................20mA
+ 0.3V)
CC
CC
Rate of Rise (V )...........................................................100V/µs
CC
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V
= full range, T = -40°C to +85°C, unless otherwise noted. Typical values are at T = +25°C and V
= 3V.) (Note 1)
CC
A
A
CC
PARAMETER
SYMBOL
CONDITIONS
= 0°C to +70°C
MIN
1.0
TYP
MAX
5.5
UNITS
T
T
A
V
CC
Range
V
= -40°C to +85°C
1.2
5.5
A
MAX632_ only, V = 3.0V for V ≤ 2.93V,
CC
CC
TH
0.5
1.0
1.0
V
= 3.2V for V > 2.93V, no load
TH
Supply Current
I
µA
V
CC
V
CC
= 5.5V, no load
1.75
V
1.5%
-
V
1.5%
+
TH
TH
T
T
= +25°C
V
A
TH
Reset Threshold
V
Table 1
TH
V
TH
-
V
TH
+
= -40°C to +85°C
V
TH
A
2.5%
2.5%
Reset Threshold Tempco
∆V /°C
40
20
ppm/°C
µs
TH
V
CC
to Reset Delay
V = V to (V - 100mV)
CC TH TH
Reset Active Timeout Period
100
185
280
0.3
ms
RESET Output Voltage
(MAX6326/MAX6328/
MAX6346/MAX6348)
I
I
= 1.6mA, V
= 100µA, V
> 2.1V, reset asserted
SINK
CC
V
V
V
OL
≥ 1.2V, reset asserted
0.4
SINK
CC
I
I
I
= 500µA, V
= 800µA, V
= 800µA, V
= 500µA, V
= 3.2V, MAX6326 only
0.8 · V
0.8 · V
0.8 · V
0.8 · V
0.8 · V
SOURCE
SOURCE
SOURCE
CC
CC
CC
CC
CC
RESET Output Voltage
(MAX6326/MAX6346)
V
V
= 4.5V, V ≤ 4.38V
TH
OH
CC
CC
CC
CC
= V , V ≥ 4.5V
TH(MAX) TH
I
≥ 2.1V, reset asserted
≥ 1.2V, reset asserted
SOURCE
SOURCE
OH
I
= 50µA, V
CC
I
= 1.2mA, V
≥ 3.2V, reset not asserted,
SINK
CC
0.3
RESET Output Voltage
(MAX6327/MAX6347)
MAX6327 only
V
V
OL
I
= 3.2mA, V
≥ 4.5V, reset not asserted,
SINK
CC
0.4
0.4
V
≤ 4.38V
TH
I
= 3.2mA, V
= V , V ≥ 4.5V
TH(MAX) TH
SINK
CC
MAX6326/MAX6327/MAX6328
MAX6346/MAX6347/MAX6348
6.3
9.5
RESET Threshold
Hysteresis
mV
µA
Open-Drain RESET Output
Leakage Current
0.1
Note 1: Overtemperature limits are guaranteed by design and not production tested.
2
_______________________________________________________________________________________
3-Pin, Ultra-Low-Power SC70/SOT
µP Reset Circuits
__________________________________________Typical Operating Characteristics
(T = +25°C, unless otherwise noted.)
A
POWER-DOWN RESET DELAY
vs. TEMPERATURE
SUPPLY CURRENT vs. TEMPERATURE
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
200
150
V
= 5V
CC
V
= 3.3V
CC
100
50
0
V
= 20mV
OD
V
= 10mV
OD
V
OD
= 100mV
V
= 1.2V
20
CC
V
= 200mV
40
OD
-40
-20
0
20
60
80
-40 -20
0
40
60
80
TEMPERATURE (°C)
TEMPERATURE (°C)
POWER-UP RESET TIMEOUT
vs. TEMPERATURE
MAXIMUM TRANSIENT DURATION
vs. RESET THRESHOLD OVERDRIVE (SC70)
210
500
400
300
200
100
0
200
190
180
170
160
150
140
130
-40 -20
0
20
40
60
80
1
10
RESET THRESHOLD OVERDRIVE,
- V (mV)
100
1000
TEMPERATURE (°C)
V
TH
CC
______________________________________________________________Pin Description
PIN
NAME
FUNCTION
MAX6326/MAX6346
MAX6328/MAX6348
MAX6327
MAX6347
1
1
GND
Ground
Active-Low Reset Output. RESET remains low while V
is below the reset
CC
threshold and for at least 100ms after V
RESET is open-drain on the MAX6328/MAX6348 and push-pull on the
rises above the reset threshold.
CC
2
—
RESET
MAX6326/MAX6346.
Active-High Reset Output. RESET remains high while V
is below the reset
CC
—
3
2
3
RESET
threshold and for at least 100ms after V
rises above the reset threshold.
CC
V
CC
Supply Voltage
_______________________________________________________________________________________
3
3-Pin, Ultra-Low-Power SC70/SOT
µP Reset Circuits
____________ Applications Information
V
CC
Interfacing to µPs with
Bidirectional Reset Pins
V
V
CC
CC
Since the RESET output on the MAX6328/MAX6348 is
open drain, these devices interface easily with micro-
processors (µPs) that have bidirectional reset pins,
such as the Motorola 68HC11. Connecting the µP
supervisor’s RESET output directly to the microcon-
troller’s (µC’s) RESET pin with a single pull-up resistor
allows either device to assert reset (Figure 1).
µP
MAX6328
MAX6348
MOTOROLA
68HCXX
RESET
INPUT
RESET
Negative-Going V
Transients
CC
GND
GND
In addition to issuing a reset to the µP during power-up,
power-down, and brownout conditions, these devices
are relatively immune to short-duration, negative-going
V
transients (glitches).
CC
Figure 1. Interfacing to µPs with Bidirectional Reset Pins
The Typical Operating Characteristics show the Maxi-
mum Transient Duration vs. Reset Threshold Overdrive
graph, for which reset pulses are not generated. The
graph shows the maximum pulse width that a negative-
going V
transient may typically have when issuing a
CC
reset signal. As the amplitude of the transient increas-
es, the maximum allowable pulse width decreases.
‡
Table 1. Factory-Trimmed Reset Thresholds
RESET THRESHOLD VOLTAGE, V (V)
TH
PART
SUFFIX
T
A
= +25°C
T = -40°C to +85°C
A
MIN
TYP
MAX
2.233
2.355
2.436
2.537
2.669
2.741
2.842
2.974
3.045
3.126
3.350
3.451
3.552
3.654
3.755
3.857
MIN
MAX
MAX632_ _R
MAX632_ _R
MAX632_ _R
MAX632_ _R
MAX632_ _R
MAX632_ _R
MAX632_ _R
MAX632_ _R
MAX632_ _R
MAX632_ _R
MAX634_ _R
MAX634_ _R
MAX634_ _R
MAX634_ _R
MAX634_ _R
MAX634_ _R
22
23
24
25
26
27
28
29
30
31
33
34
35
36
37
38
2.167
2.285
2.364
2.462
2.591
2.660
2.758
2.886
2.955
3.034
3.250
3.349
3.447
3.546
3.644
3.743
2.200
2.320
2.400
2.500
2.630
2.700
2.800
2.930
3.000
3.080
3.300
3.400
3.500
3.600
3.700
3.800
2.145
2.262
2.340
2.437
2.564
2.633
2.730
2.857
2.925
3.003
3.217
3.315
3.412
3.510
3.607
3.705
2.250
2.375
2.460
2.562
2.696
2.768
2.870
3.000
3.075
3.150
3.383
3.485
3.587
3.690
3.792
3.895
‡
Factory-trimmed reset thresholds are available in approximately 100mV increments with a 1.5% room-temperature variance.
4
_______________________________________________________________________________________
3-Pin, Ultra-Low-Power SC70/SOT
µP Reset Circuits
Table 1. Factory-Trimmed Reset Thresholds‡ (continued)
RESET THRESHOLD VOLTAGE, V (V)
TH
PART
SUFFIX
T = +25°C
A
T
A
= -40°C to +85°C
MIN
TYP
MAX
3.958
4.060
4.161
4.263
4.364
4.446
4.567
4.699
MIN
MAX
MAX634_ _R
MAX634_ _R
MAX634_ _R
MAX634_ _R
MAX634_ _R
MAX634_ _R
MAX634_ _R
MAX634_ _R
39
40
41
42
43
44
45
46
3.841
3.940
4.038
4.137
4.235
4.314
4.432
4.560
3.900
4.000
4.100
4.200
4.300
4.380
4.500
4.630
3.802
3.900
3.997
4.095
4.192
4.270
4.387
4.514
3.997
4.100
4.202
4.305
4.407
4.489
4.612
4.746
‡
Factory-trimmed reset thresholds are available in approximately 100mV increments with a 1.5% room-temperature variance.
Table 2. Device Marking Codes and Minimum Order Increments
ORDER
INCREMENT
(k)
ORDER
INCREMENT
(k)
TOP MARK
TOP MARK
PART
PART
SOT23
SC70
SOT23
SC70
MAX6346_R46-T
MAX6346_R45-T
MAX6346_R44-T
MAX6346_R43-T
MAX6346_R42-T
MAX6346_R41-T
MAX6346_R40-T
MAX6346_R39-T
MAX6346_R38-T
MAX6346_R37-T
MAX6346_R36-T
MAX6346_R35-T
MAX6346_R34-T
MAX6346_R33-T
MAX6326_R31-T
MAX6326_R30-T
MAX6326_R29-T
MAX6326_R28-T
MAX6326_R27-T
MAX6326_R26-T
MAX6326_R25-T
MAX6326_R24-T
MAX6326_R23-T
MAX6326_R22-T
FZBI
FZBH
FZBG
FZBF
FZBE
FZBD
FZBC
FZBB
FZBA
FZAZ
FZAY
FZAX
FZAW
FZAV
FDAA
FEAA
FCAA
FBAA
FAAA
EZAA
EYAA
EXAA
EWAA
EHAA
ACO
2.5
10
2.5
10
10
10
10
10
10
10
10
10
10
10
2.5
10
2.5
10
10
2.5
10
10
2.5
2.5
MAX6347_R46-T
MAX6347_R45-T
MAX6347_R44-T
MAX6347_R43-T
MAX6347_R42-T
MAX6347_R41-T
MAX6347_R40-T
MAX6347_R39-T
MAX6347_R38-T
MAX6347_R37-T
MAX6347_R36-T
MAX6347_R35-T
MAX6347_R34-T
MAX6347_R33-T
MAX6327_R31-T
MAX6327_R30-T
MAX6327_R29-T
MAX6327_R28-T
MAX6327_R27-T
MAX6327_R26-T
MAX6327_R25-T
MAX6327_R24-T
MAX6327_R23-T
MAX6327_R22-T
FZBW
FZBV
FZBU
FZBT
FZBS
FZBR
FZBQ
FZBP
FZBO
FZBN
FZBM
FZBL
FZBK
FZBJ
FMAA
FNAA
FLAA
FKAA
FJAA
FIAA
ACF
2.5
10
2.5
10
10
10
10
10
10
10
10
10
10
10
2.5
10
2.5
10
10
2.5
10
10
2.5
2.5
–
–
ACK
ACL
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
ACE
–
ACT
–
ACP
–
ACS
–
–
–
ACI
–
ACR
–
FHAA
FGAA
FFAA
EIAA
–
–
ACH
AAH
ACQ
AAI
_______________________________________________________________________________________
5
3-Pin, Ultra-Low-Power SC70/SOT
µP Reset Circuits
Table 2. Device Marking Codes and Minimum Order Increments (continued)
ORDER
INCREMENT
(k)
ORDER
INCREMENT
(k)
TOP MARK
TOP MARK
PART
PART
SOT23
SC70
SOT23
SC70
MAX6348_R46-T
MAX6348_R45-T
MAX6348_R44-T
MAX6348_R43-T
MAX6348_R42-T
MAX6348_R41-T
MAX6348_R40-T
MAX6348_R39-T
MAX6348_R38-T
MAX6348_R37-T
MAX6348_R36-T
MAX6348_R35-T
FZCK
FZCJ
FZCI
ACN
2.5
10
2.5
10
10
10
10
10
10
10
10
10
MAX6348_R34-T
MAX6348_R33-T
MAX6328_R31-T
MAX6328_R30-T
MAX6328_R29-T
MAX6328_R28-T
MAX6328_R27-T
MAX6328_R26-T
MAX6328_R25-T
MAX6328_R24-T
MAX6328_R23-T
MAX6328_R22-T
FZBY
FZBX
FVAA
FWAA
FUAA
FTAA
FSAA
FRAA
FQAA
FPAA
FOAA
EJAA
–
–
10
10
–
ACM
ACW
–
2.5
10
FZCH
FZCG
FZCF
FZCE
FZCD
FZCC
FZCB
FZCA
FZBZ
–
–
–
–
–
–
–
–
–
ACV
–
2.5
10
–
10
ACJ
–
2.5
10
–
10
ACU
AAJ
2.5
2.5
___________________Chip Information
Selector Guide
(standard versions*)
TRANSISTOR COUNT: 419
NOMINAL V
(V)
TH
PART
MAX634_ _R46-T
4.63
4.38
3.08
2.93
2.63
2.32
2.20
MAX634_ _R44-T
MAX632_ _R31-T
MAX632_ _R29-T
MAX632_ _R26-T
MAX632_ _R23-T
MAX632_ _R22-T
*Sample stock is generally held on all standard versions.
6
_______________________________________________________________________________________
3-Pin, Ultra-Low-Power SC70/SOT
µP Reset Circuits
________________________________________________________Package Information
_______________________________________________________________________________________
7
3-Pin, Ultra-Low-Power SC70/SOT
µP Reset Circuits
Package Information (continued)
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
8 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2000 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
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