SP703/704DS/07

SP703/704 Low Power Microprocessor Supervisory

© Copyright 2000 Sipex Corporation

1

SP703/SP704

Low Power Microprocessor Supervisory

with Battery Switch-Over

The SP703/704 devices are microprocessor (

µP) supervisory circuits that integrate a myriad

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

functions in

µP 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

µP 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

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

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

µA Maximum Operating Supply Current

s 0.6

µA Maximum Battery Backup Current

s 0.1

µA Maximum Battery Standby Current

s Power Switching

250mA Output in V

25mA Output in Battery Mode (5

Ω)

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

s Pin Compatible Upgrades to

MAX703/MAX704

DESCRIPTION

PINOUT

GND

PFI

RESET

MR

PFO

1

2

3

4

5

6

7

8

INTERNAL BLOCK DIAGRAM

1.25V

1.25V

BATTERY SWITCHOVER

CIRCUITRY

PFI

MR

RESET

GENERATOR

RESET

PFO

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