1

2

3

GND

Reset

Output

Description

• The GS809C and 810C are system supervisor

and provide a reset signal to the host processor

when necessary. No external components are

required.

• When the processor power supply voltage drops

below the reset threshold, the reset output is driven

active, in less than 40

rises above the threshold voltage.

• To prevent jitter, the reset threshold voltage has a

• The GS809C has an active-low reset output, while

the GS810C has an active-high reset output. Both

devices have push/pull output drives.

• The reset signal is guaranteed valid, down to

• Low supply current of 3

µA makes these devices

well suited for battery powered applications. They

are designed to reject fast transients from causing

false resets.

• Both devices are available in a space-saving

SOT-23 package.

Features

• Tight reset voltage tolerances ± 1.5%

• 4 reset active timeout period options

• Low quiescent current: < 3

µA

• 9 reset threshold options from 2.1V to 4.63V

• Reset output guaranteed down to 1.0V

• No external components

• Wide temperature range –40°C to +85°C

GS809C

Processor

Reset

Reset

Input

GND

GND

Fig. 1 – Typical Application Diagram

Pin Configuration

SOT-23 (Top View)

Applications

• Computers

• Battery Powered Equipment

• Critical uProcessor and uController power supply

monitoring

GS809C and GS810C

Vishay

formerly General Semiconductor

Document Number 74808

www.vishay.com

01-Nov-02

1

New Product

Microprocessor Reset Monitors