19-1508; Rev 6; 12/05
Dual/Triple-Voltage
µP Supervisory Circuits
General Description
Features
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.
♦ Precision Monitoring of Multiple +1.8V, +2.5V,
+3.0V, +3.3V, and +5V Power-Supply Voltages
♦ Precision Factory-Set Power-Supply
Reset Thresholds
♦ 20µA Supply Current
♦ 100ms min Power-On Reset Pulse Width
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.
♦ Debounced TTL/CMOS-Compatible
Manual-Reset Input
♦ Watchdog Timer
46.4s Startup Timeout
2.9s Normal Timeout
The MAX6351 features two active-low, push-pull reset
outputs, one is referenced to V 1 and the other is refer-
CC
♦ Fully Guaranteed Over Temperature
enced to V 2. The MAX6353/MAX6356/MAX6359 offer
CC
♦ Guaranteed RESET Valid to V 1 = 1V or
CC
an active-low, push-pull reset output referenced to V 1.
CC
V
2 = 1V
CC
The MAX6354/MAX6357/MAX6360 offer an active-low,
push-pull reset output referenced to V 2.
CC
♦ Power-Supply Transient Immunity
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.
♦ No External Components for Dual-Voltage
Systems
♦ Small 5- and 6-Pin SOT23 Packages
♦ Low Cost
__________Voltage Threshold Levels
Applications
PART NO.
SUFFIX
(_ _)
V
1 NOMINAL
VOLTAGE
V
2 NOMINAL
VOLTAGE
CC
CC
Computers
Controllers
Intelligent Instruments
Multivoltage Systems
THRESHOLD (V)
4.63
THRESHOLD (V)
3.08
LT
LS
LR
Portable/Battery-Powered
Equipment
4.63
2.93
4.63
2.63
Ordering Information
MT
MS
MR
TZ
4.38
3.08
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
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
4.38
2.93
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
4.38
2.63
3.08
2.32
TY
3.08
2.19
TW
TV
3.08
1.67
3.08
1.58
SZ
2.93
2.32
SY
SW
SV
UW
UV
RW
RV
2.93
2.19
2.93
1.67
2.93
1.58
*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.
Devices are available in both leaded and lead-free packaging.
Specify lead-free by replacing “-T” with “+T” when ordering.
2.78
1.67
2.78
1.58
2.63
1.67
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.
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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