MAX6351–MAX6360
Dual/Triple-Voltage
μP Supervisory Circuits
General Description
Features
● Precision Monitoring of Multiple +1.8V, +2.5V, +3.0V,
+3.3V, and +5V Power-Supply Voltages
The MAX6351–MAX6360 microprocessor (μP) supervi-
sors with multiple reset voltages significantly improve
system 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 Factory-Set Power-Supply
Reset Thresholds
● 20μA Supply Current
● 100ms min Power-On-Reset Pulse Width
● Debounced TTL/CMOS-Compatible
Manual-Reset Input
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 startup
timeout period and a 2.9s timeout period. The MAX6355/
MAX6356/MAX6357 offer an additional voltage-monitor
input to monitor a third voltage.
● Watchdog Timer
• 46.4s Startup Timeout
• 2.9s Normal Timeout
● Fully Guaranteed Over Temperature
● Guaranteed RESET Valid to V 1 = 1V or V 2 = 1V
● Power-Supply Transient Immunity
CC
CC
The MAX6351 features two active-low, push-pull reset
● No External Components for Dual-Voltage Systems
● Small 5- and 6-Pin SOT23 Packages
● Low Cost
outputs, one is referenced to V 1 and the other is refer-
CC
enced to V 2. The MAX6353/MAX6356/MAX6359 offer
CC
an active-low, push-pull reset output referenced to VCC1.
The MAX6354/MAX6357/MAX6360 offer an active-low,
Applications
● Computers
● Intelligent Instruments
● Multivoltage Systems
push-pull reset output referenced to V 2.
CC
● Controllers
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 oper-
ate over the extended (-40°C to +85°C) temperature range.
● Portable/Battery-
Powered Equipment
Ordering Information
Voltage Threshold Levels
PART
TEMP RANGE
PIN-PACKAGE
PART NO.
SUFFIX
(_ _)
V
1 NOMINAL
VOLTAGE
V
2 NOMINAL
VOLTAGE
CC
CC
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
-40°C to +85°C
6 SOT23
5 SOT23
5 SOT23
5 SOT23
6 SOT23
6 SOT23
6 SOT23
6 SOT23
6 SOT23
6 SOT23
-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
THRESHOLD (V)
THRESHOLD (V)
LT
LS
LR
MT
MS
MR
TZ
TY
TW
TV
4.63
4.63
4.63
4.38
4.38
4.38
3.08
3.08
3.08
3.08
2.93
2.93
2.93
2.93
2.78
2.78
2.63
2.63
3.08
2.93
2.63
3.08
2.93
2.63
2.32
2.19
1.67
1.58
2.32
2.19
1.67
1.58
1.67
1.58
1.67
1.58
*The _ _ are placeholders for the threshold voltage levels of
the devices. Substitute the part number suffix in the Voltage
Threshold 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.
SZ
SY
SW
SV
UW
UV
RW
RV
Devices are available in both leaded and lead(Pb)-free packag-
ing. Specify lead-free by replacing “-T” with “+T” when ordering.
Pin Configurations appear at end of data sheet.
Selector Guide appears at end of data sheet.
Note: Standard versions are shown in bold. Sample stock is
generally held on the standard versions only. Contact factory for
availability.
19-1508; Rev 7; 5/14