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General Description

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 output(s) is 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 46.4sec

start-up timeout period and a 2.9sec timeout period.

The MAX6355/MAX6356/MAX6357 offer an additional

voltage monitor input to monitor a third voltage.

The MAX6351 features both 3V and 5V active-low push-

pull reset outputs. The MAX6353/MAX6356/MAX6359

offer a 5V active-low push-pull reset. The MAX6354/

MAX6357/MAX6360 offer a 3V active-low push-pull

reset. The MAX6352/MAX6355/MAX6358’s reset is

active-low open-drain.

All of these devices are offered with a wide variety of

voltage threshold levels, as shown in the

Voltage

Threshold Levels table below. They are available in 5-

and 6-pin SOT23 packages and operate over the

extended (-40°C to +85°C) temperature range.

Applications

Computers

Intelligent Instruments

Controllers

Multivoltage Systems

Portable/Battery-Powered

Equipment

Features

o Precision Monitoring of Multiple +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 Fully Guaranteed Over Temperature

o Power-Supply Transient Immunity

o No External Components for Dual-Voltage

Systems

o Small 5- and 6-Pin SOT23 Packages

o Debounced TTL/CMOS-Compatible

Manual-Reset Input

o Watchdog Timer

46.4sec Start-Up Timeout

2.9sec Normal Timeout

o Low Cost

Dual/Triple-Voltage

µP Supervisory Circuits

________________________________________________________________

Maxim Integrated Products

1

19-1508; Rev 1; 10/99

*

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. There are

two standard versions for each of the above part numbers. All

devices are available in tape-and-reel only.

Ordering Information

PART*

MAX6351_ _UT-T

MAX6352_ _UK-T

MAX6353_ _UK-T

-40°C to +85°C

-40°C to +85°C

-40°C to +85°C

TEMP. RANGE

PIN-PACKAGE

6 SOT23-6

5 SOT23-5

5 SOT23-5

MAX6354_ _UK-T

MAX6355_ _UT-T

MAX6356_ _UT-T

-40°C to +85°C

-40°C to +85°C

-40°C to +85°C

5 SOT23-5

6 SOT23-6

6 SOT23-6

MAX6357_ _UT-T

MAX6358_ _UT-T

MAX6359_ _UT-T

-40°C to +85°C

-40°C to +85°C

-40°C to +85°C

6 SOT23-6

6 SOT23-6

6 SOT23-6

MAX6360_ _UT-T

-40°C to +85°C

6 SOT23-6

PART NO.

SUFFIX

(_ _)

VOLTAGE

THRESHOLD (V)

VOLTAGE

THRESHOLD (V)

LT

4.63

3.08

LS

LR

4.63

2.63

4.63

2.93

MT

MS

4.38

2.93

MR

4.38

3.08

TY

3.08

2.19

4.38

2.63

SY

2.93

2.19

Note: Standard versions are shown in bold and have a required

order increment of 2500 pieces. Sample stock is generally held on

the standard versions only. The required order increment for non-

standard versions is 10,000 pieces. Contact factory for availability.

__________Voltage Threshold Levels

Pin Configurations appear at end of data sheet.

Selector Guide appears at end of data sheet.