_______________General Description

The MAX6301–MAX6304* low-power microprocessor

(µP) supervisory circuits provide maximum adjustability

for reset and watchdog functions. The reset threshold

can be adjusted to any voltage above 1.22V, using

external resistors. In addition, the reset and watchdog

timeout periods are adjustable using external capaci-

tors. A watchdog select pin extends the watchdog time-

out period to 500x. The reset function features immunity

to power-supply transients.

These four devices differ only in the structure of their reset

outputs (see the

Selector Guide). The MAX6301–MAX6304

as well as 8-pin PDIP and SO packages.

Applications

Medical Equipment

Embedded Controllers

Intelligent Instruments

Critical µP Monitoring

Portable Equipment

Set-Top Boxes

Battery-Powered

Computers

Computers/Controllers

____________________________Features

o Adjustable Reset Threshold

o Adjustable Reset Timeout

o Adjustable Watchdog Timeout

o 500x Watchdog Timeout Multiplier

o 4µA Supply Current

o RESET or RESET Output Options

o Push-Pull or Open-Drain Output Options

o Guaranteed RESET Asserted At or Above

o Power-Supply Transient Immunity

o Watchdog Function can be Disabled

o PDIP/SO/µMAX Packages Available

+5V, Low-Power µP Supervisory Circuits

with Adjustable Reset/Watchdog

________________________________________________________________

Maxim Integrated Products

1

0.1

µF

MAX6301

MAX6302

MAX6303

MAX6304

RESET IN

SRT

GND

SWT

WDI

WDS

RESET

µP

I/O

RESET

(RESET)

R2

R1

MAX6301

ONLY

MAX6302

ONLY

8

7

6

5

1

2

3

4

WDS = 0 FOR NORMAL MODE

WDS = 1 FOR EXTENDED MODE

( ) ARE FOR MAX6302/MAX6304.

Pin Configuration

1

2

8

7

RESET (RESET)

WDI

WDS

RESET IN

GND

SRT

SWT

MAX6301

MAX6302

MAX6303

MAX6304

DIP/SO/

µMAX

TOP VIEW

3

4

6

5

( ) ARE FOR MAX6302/MAX6304.

Typical Operating Circuit

19-1078; Rev 4; 9/10

Ordering Information

Ordering Information continued at end of data sheet.

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.

Selector Guide

FEATURE

MAX6301

MAX6302

MAX6303

MAX6304

Active-Low

Reset

√

—

√

—

Active-High

Reset

—

√

—

√

Open-Drain

Reset Output

√√

——

Push-Pull

Reset Output

——

√√

Pin-Package

8-PDIP/SO/

µMAX

8-PDIP/SO/

µMAX

8-PDIP/SO/

µMAX

8-PDIP/SO/

µMAX

µMAX is a registered trademark of Maxim Integrated Products, Inc.

PART

TEMP RANGE

PIN-PACKAGE

MAX6301CPA

0°C to +70°C

8 PDIP

MAX6301CSA

0°C to +70°C

8 SO

MAX6301CUA

0°C to +70°C

8 µMAX

MAX6301EPA

-40°C to +85°C

8 PDIP

MAX6301ESA

-40°C to +85°C

8 SO

Devices are available in both leaded and lead(Pb)-free/RoHS-

compliant packaging. Specify lead-free by adding the “+

”

symbol at the end of the part number when ordering.