General Description

The MAX6453–MAX6456 are low-power, dual-voltage

al reset outputs. The dual outputs support both soft-

system reset (interrupt) and hard-system reset (reboot)

functions. The reset output asserts when any of the

monitored voltages falls below its specified threshold

and remains asserted for the reset timeout (140ms min)

after all voltages exceed their respective reset thresh-

olds. All devices are offered with nine factory-fixed

reset thresholds for monitoring primary system voltages

monitoring a secondary system voltage down to 0.63V.

put, and a manual reset output. The MAX6453/

MAX6454 manual reset output asserts when the manual

reset input is low. It remains asserted for the manual

reset timeout period (140ms min) after the manual reset

input transitions high. The MAX6453/MAX6354 manual

reset input controls only the manual reset output and

The manual reset input of the MAX6455/MAX6456 con-

the manual reset input is low for less than 3.3s (typ), only

the manual reset output asserts and remains asserted for

the manual reset timeout period (140ms min) after the

manual reset input transitions high. If the manual reset

input is low for at least 3.3s (typ), the reset output also

asserts and remains asserted for the reset timeout peri-

od (140ms min) after the manual reset input transitions

high. This enhanced feature allows the implementation of

a soft/hard-system reset combination.

The MAX6453/MAX6455 have active-low push-pull

reset and manual reset outputs, and the MAX6454/

MAX6456 have active-low open-drain reset and manual

reset outputs. All devices are available in small SOT23-

6 packages and are fully specified over the extended

temperature range (-40°C to +85°C).

Applications

Set-Top Boxes

Consumer Electronics

DVD Players

Modems

MP3 Players

Industrial Equipment

Automotive

Medical Devices

Features

o Precision Factory-Set Reset Thresholds From

1.6V to 4.6V

o Adjustable Threshold to Monitor Voltages Down

to 0.63V

o Manual Reset Input with Extended 3.36s Setup

Period

o Immune to Short Voltage Transients

o Low 6µA Supply Current

o Active-Low RESET (Push-Pull or Open-Drain)

Outputs

o 140ms (min) Reset Timeout Period

o Small SOT Package

Manual Reset Outputs

________________________________________________________________ Maxim Integrated Products

1

GND

MROUT

16

MR

5

RSTIN

RESET

MAX6453

MAX6454

SOT23-6

TOP VIEW

2

34

GND

MROUT

16

MR

5

RSTIN

RESET

MAX6455

MAX6456

SOT23-6

2

34

Pin Configurations

Ordering Information

19-2637; Rev 1; 4/03

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.

PART

TEMP RANGE

PIN-PACKAGE

MAX6453UT_ _S-T

-40°C to +85°C

6 SOT23-6

MAX6454UT_ _S-T

-40°C to +85°C

6 SOT23-6

MAX6455UT_ _S-T

-40°C to +85°C

6 SOT23-6

MAX6456UT_ _S-T

-40°C to +85°C

6 SOT23-6

Note: The “_” is a placeholder for the threshold voltage level of

the devices. A desired threshold level is set by the part num-

ber suffix found in Table 1. All devices are available in tape-

and-reel only. There is a 2500-piece minimum order increment

for standard versions (Table 2). Sample stock is typically held

on standard versions only. Nonstandard versions require a

minimum order increment of 10,000 pieces. Contact factory for

availability.

Selector Guide appears at end of data sheet.