MAX6351 データシートの表示（PDF） - Maxim Integrated
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MAX6351 Datasheet PDF : 11 Pages
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19-1508; Rev 5; 2/03
Dual/Triple-Voltage
µP Supervisory Circuits
General Description
The MAX6351–MAX6360 microprocessor (µP) supervi-
sors with multiple reset voltages significantly improve sys-
tem reliability and accuracy compared to separate ICs or
discrete components. If any input supply voltage drops
below its associated preset threshold, all reset outputs
are asserted. In addition, the outputs are valid as long as
either input supply voltage remains greater than +1.0V.
All devices in this series have an active-low debounced
manual reset input. In addition, the MAX6358/MAX6359/
MAX6360 offer a watchdog-timer input with a 46.4s start-
up timeout period and a 2.9s timeout period. The
MAX6355/MAX6356/MAX6357 offer an additional voltage
monitor input to monitor a third voltage.
The MAX6351 features two active-low, push-pull reset
outputs, one is referenced to VCC1 and the other is refer-
enced to VCC2. The MAX6353/MAX6356/MAX6359 offer
an active-low, push-pull reset output referenced to VCC1.
The MAX6354/MAX6357/MAX6360 offer an active-low,
push-pull reset output referenced to VCC2.
All these devices are offered with a wide variety of voltage
threshold levels, as shown in the Voltage Threshold
Levels table. They are available in 5- and 6-pin SOT23
packages and operate over the extended (-40°C to
+85°C) temperature range.
__________Voltage Threshold Levels
PART NO.
SUFFIX
VCC1 NOMINAL
VOLTAGE
VCC2 NOMINAL
VOLTAGE
(_ _)
THRESHOLD (V) THRESHOLD (V)
LT
4.63
3.08
LS
4.63
2.93
LR
4.63
2.63
MT
4.38
3.08
MS
4.38
2.93
MR
4.38
2.63
TZ
3.08
2.32
TY
3.08
2.19
TW
3.08
1.67
TV
3.08
1.58
SZ
2.93
2.32
SY
2.93
2.19
SW
2.93
1.67
SV
2.93
1.58
UW
2.78
1.67
UV
2.78
1.58
RW
2.63
1.67
RV
2.63
1.58
Note: Standard versions are shown in bold. Sample stock is gen-
erally held on the standard versions only. Contact factory for avail-
ability.
Features
o Precision Monitoring of Multiple +1.8V, +2.5V,
+3.0V, +3.3V, and +5V Power-Supply Voltages
o Precision Factory-Set Power-Supply
Reset Thresholds
o 20µA Supply Current
o 100ms min Power-On Reset Pulse Width
o Debounced TTL/CMOS-Compatible
Manual-Reset Input
o Watchdog Timer
46.4s Startup Timeout
2.9s Normal Timeout
o Fully Guaranteed Over Temperature
o Guaranteed RESET Valid to VCC1 = 1V or
VCC2 = 1V
o Power-Supply Transient Immunity
o No External Components for Dual-Voltage
Systems
o Small 5- and 6-Pin SOT23 Packages
o Low Cost
Applications
Computers
Controllers
Portable/Battery-Powered
Equipment
Intelligent Instruments
Multivoltage Systems
Ordering Information
PART*
MAX6351_ _UT-T
MAX6352_ _UK-T
MAX6353_ _UK-T
MAX6354_ _UK-T
MAX6355_ _UT-T
MAX6356_ _UT-T
MAX6357_ _UT-T
MAX6358_ _UT-T
MAX6359_ _UT-T
MAX6360_ _UT-T
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
PIN-PACKAGE
6 SOT23-6
5 SOT23-5
5 SOT23-5
5 SOT23-5
6 SOT23-6
6 SOT23-6
6 SOT23-6
6 SOT23-6
6 SOT23-6
6 SOT23-6
*The _ _ are placeholders for the threshold voltage levels of the
devices. Substitute the part number suffix in the Voltage Thres-
hold Levels table for the desired voltage level. All devices are
available in tape-and-reel only. There is a 2500 piece minimum
order increment for the SOT package.
Pin Configurations appear at end of data sheet.
Selector Guide appears at end of data sheet.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
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