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General Description

The MAX6361/MAX6363/MAX6364 supervisory circuits

reduce the complexity and number of components

required for power-supply monitoring and battery control

functions in microprocessor (µP) systems. The circuits sig-

nificantly improve system reliability and accuracy com-

pared to that obtainable with separate ICs or discrete

components. Their functions include µP reset, backup-

battery switchover, and power failure warning.

The MAX6361/MAX6363/MAX6364 operate from supply

voltages as low as +1.2V. The factory preset reset

threshold voltage ranges from 2.32V to 4.63V (see

Ordering Information). These devices provide a manual

reset input (MAX6361), battery-on output (MAX6363),

and an auxiliary adjustable reset input (MAX6364). In

addition, each part type is offered in three reset output

versions: an active-low push-pull reset, an active-low

open-drain reset, and an active-high push-pull reset

(see Selector Guide at end of data sheet).

Applications

Features

o Low +1.2V Operating Supply Voltage

o Precision Monitoring of +5.0V, +3.3V, +3.0V, and

+2.5V Power-Supply Voltages

o Debounced Manual Reset Input (MAX6361)

o Battery-On Output Indicator (MAX6363)

o Auxiliary User-Adjustable RESET IN (MAX6364)

o Three Available Output Structures

Push-Pull RESET, Open-Drain RESET,

Push-Pull RESET

o RESET/RESET Valid Down to 1.2V Guaranteed

o Power-Supply Transient Immunity

o 150ms (min) Reset Timeout Period

o Small 6-Pin SOT23 Package

SOT23, Low-Power µP Supervisory Circuits

with Battery Backup

________________________________________________________________ Maxim Integrated Products

1

19-1615; Rev 0; 1/00

Ordering Information

Pin Configurations

Note: These parts offer a choice of reset threshold voltages.

From Table 1, select the suffix corresponding to the desired

threshold voltage and insert it into the part number to complete

it. When ordering from the factory, there is a 2500-piece mini-

mum on the SOT package (tape-and-reel only).

GND

MR

16

BATT

5

OUT

RESET, RESET

MAX6361

TOP VIEW

2

34

SOT23-6

Computers

Controllers

Intelligent Instruments

Critical µP/µC

Power Monitoring

Fax Machines

Industrial Control

POS Equipment

Portable/Battery-Powered

Equipment

Selector Guide appears at end of data sheet.

Typical Operating Circuit appears at end of data sheet.

Pin Configurations continued at end of data sheet.

6 SOT23-6

-40°C to +85°C

MAX6364HUT_ _-T

6 SOT23-6

-40°C to +85°C

MAX6364PUT_ _-T

6 SOT23-6

-40°C to +85°C

MAX6364LUT_ _-T

6 SOT23-6

-40°C to +85°C

6 SOT23-6

-40°C to +85°C

MAX6363HUT_ _-T

MAX6363PUT_ _-T

6 SOT23-6

-40°C to +85°C

6 SOT23-6

-40°C to +85°C

MAX6363LUT_ _-T

6 SOT23-6

PIN-PACKAGE

TEMP. RANGE

-40°C to +85°C

MAX6361HUT_ _-T

6 SOT23-6

-40°C to +85°C

MAX6361PUT_ _-T

MAX6361LUT_ _-T

PART