January 2007

PCS809/PCS810

rev 0.2

Notice: The information in this document is subject to change without notice.

PulseCore Semiconductor Corporation

1715 S. Bascom Ave Suite 200 Campbell, CA 95008

• Tel: 408-879-9077 • Fax: 408-879-9018

www.pulsecoresemi.com

3-Pin µP Voltage Supervisor

FEATURES

•

Ultra Low Supply Current 1µA(typ.)

•

Guaranteed Reset Valid to VCC=0.9V

•

Available in three Output Types: Open Drain

Active Low (PCS809N), Push-Pull Active Low

(PCS809), Push-Pull Active High (PCS810)

•

140ms Min. Power-On Reset Pulse Width

•

Internally Fixed Threshold 2.3V, 2.6V, 2.9V,

3.1V, 4.0V, 4.4V, and 4.6V

•

Tight Voltage Threshold Tolerance: 1.5%

•

Low profile Package: SOT-23-3

APPLICATIONS

•

Notebook Computers

•

Digital Still Cameras

•

PDAs

•

Critical Microprocessor Monitoring

RESET THRESHOLD

Suffix

Voltage(V)

L

4.6

M

4.4

J

4.0

T

3.1

S

2.9

R

2.6

P

2.3

DESCRIPTION

PCS809/PCS810 are low-power microprocessor (µP)

supervisory circuits used to monitor power supplies in µP

and digital systems. They provide applications with

benefits of circuit reliability and low cost by eliminating

external components.

These devices perform as valid singles in applications with

VCC ranging from 6.0V down to 0.9V. The reset signal

lasts for a minimum period of 140ms whenever VCC

supply voltage falls below preset threshold. Both PCS809

and PCS810 were designed with a reset comparator to

help identify invalid signals, which last less than 140ms.

The only difference between them is that they have an

active-low RESET output and active-high RESET output,

respectively.

Low supply current (1µA) makes PCS809/PCS810 ideal

for portable equipment. The devices are available in 3-

SOT-23 package

Typical Operating Circuit

VCC

GND

GND

VCC

VCC

RESET

(RESET)

RESET

INPUT

PCS809

(PCS810)

µP

Push-Pull Output