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 the extended

setup timeout period, only the manual reset output

asserts and remains asserted for the manual reset time-

out period (140ms min) after the manual reset input tran-

sitions high. If the manual reset input is low for at least

the extended setup timeout period, 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 manu-

al 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

Cable/DSL Modems

MP3 Players

Industrial Equipment

Automotive

Medical Devices

Features

♦ Precision Factory-Set Reset Thresholds From

1.6V to 4.6V

♦ Adjustable Threshold to Monitor Voltages Down

to 0.63V

♦ Manual Reset Input with Extended Setup Period

♦ Immune to Short Voltage Transients

♦ Low 6µA Supply Current

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

Outputs

♦ 140ms (min) Reset Timeout Period

♦ 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 3; 6/10

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

PART

TEMP RANGE

PIN-PACKAGE

MAX6453UT_ _ _-T

-40°C to +85°C

6 SOT23

MAX6454UT_ _ _-T

-40°C to +85°C

6 SOT23

MAX6455UT_ _ _-T

-40°C to +85°C

6 SOT23

MAX6456UT_ _ _-T

-40°C to +85°C

6 SOT23

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

level of the devices. A desired threshold level is set by the part

number suffix found in Table 1. The third “_” is a placeholder for

the manual reset setup period of the devices. A desired setup

period is set by the letter suffix found in Table 2. 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 ver-

sions require a minimum order increment of 10,000 pieces.

Contact factory for availability.

Devices are available in both leaded and lead(Pb)-free packaging.

Specify lead-free by replacing “-T” with “+T” when ordering.

Selector Guide appears at end of data sheet.