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廬

SP703/SP704

Low Power Microprocessor Supervisory

with Battery Switch-Over

s

Precision Voltage Monitor:

SP703 at 4.65V

SP704 at 4.40V

s

Reset Time Delay - 200ms

s

Debounced TTL/CMOS -

Compatible Manual - Reset Input

s

Minimum component count

s

60碌A(chǔ) Maximum Operating Supply Current

s

0.6碌A(chǔ) Maximum Battery Backup Current

s

0.1碌A(chǔ) Maximum Battery Standby Current

s

Power Switching

250mA Output in V

CC

Mode (0.6鈩?

25mA Output in Battery Mode (5鈩?

s

Voltage Monitor for Power Fail or

Low Battery Warning

s

Available in 8 pin SO and DIP packages

s

RESET asserted down to V

CC

= 1V

s

Pin Compatible Upgrades to

MAX703/MAX704

DESCRIPTION

The

SP703/704

devices are microprocessor (碌P) supervisory circuits that integrate a myriad

of components involved in discrete solutions to monitor power-supply and battery-control

functions in

碌P

and digital systems. The series will significantly improve system reliability and

operational efficiency when compared to discrete solutions. The features of the

SP703/704

devices include a manual reset input, a

碌P

reset and backup-battery switchover, and power-

failure warning. The series is ideal for applications in computers, controllers, intelligent

instruments and automotive systems. All designs where it is critical to monitor the power

supply to the

碌P

and its related digital components will find the series to be an ideal solution.

V

BATT

BATTERY SWITCHOVER

CIRCUITRY

V

OUT

V

OUT

V

CC

GND

PFI

1

2

3

4

8

7

6

5

V

BATT

RESET

MR

PFO

V

CC

RESET

GENERATOR

1.25V

RESET

MR

PFI

PFO

1.25V

PINOUT

SP703/704DS/07

INTERNAL BLOCK DIAGRAM

SP703/704 Low Power Microprocessor Supervisory

漏 Copyright 2000 Sipex Corporation

1

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