General Description

The MAX6314 low-power CMOS microprocessor (µP)

supervisory circuit is designed to monitor power

supplies in µP and digital systems. The MAX6314’s

RESET output is bidirectional, allowing it to be directly

connected to µPs with bidirectional reset inputs, such

as the 68HC11. It provides excellent circuit reliability

and low cost by eliminating external components and

adjustments. The MAX6314 also provides a debounced

manual reset input.

This device performs a single function: it asserts a reset

preset threshold or whenever manual reset is

asserted. Reset remains asserted for an internally pro-

risen above the reset threshold or manual reset is

deasserted.

The MAX6314 comes with factory-trimmed reset

threshold voltages in 100mV increments from 2.5V

to 5V. Preset timeout periods of 1ms, 20ms, 140ms,

and 1120ms (minimum) are also available. The device

comes in a SOT143 package.

For a µP supervisor with an open-drain reset pin, see

the MAX6315 data sheet.

________________________Applications

Computers

Controllers

Intelligent Instruments

Critical µP and µC Power Monitoring

Portable/Battery-Powered Equipment

Features

o Small SOT143 Package

o

RESET Output Simplifies Interface to

Bidirectional Reset I/Os

100mV Increments from 2.5V to 5V

o ±2.5% Reset Threshold Accuracy Over Temp.

o Four Reset Timeout Periods Available:

1ms, 20ms, 140ms, or 1120ms (minimum)

o 5µA Supply Current

o Pin-Compatible with MAX811

68HC11/Bidirectional-Compatible

µP Reset Circuit

________________________________________________________________

Maxim Integrated Products

1

1

2

4

3

MR

RESET

GND

MAX6314

SOT143

TOP VIEW

Pin Configuration

MAX6314

GND

RESET

µP

RESET

MR

LASER-

TRIMMED

RESISTORS

4.7k

68HC11**

**OR OTHER µC/µP WITH BIDIRECTIONAL RESET I/O PIN.

RESET

CIRCUITRY

Typical Operating Circuit

19-1090; Rev 1; 1/99

Ordering and Marking Information appears at end of

data sheet.

* Patents Pending

For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.

For small orders, phone 1-800-835-8769.