CAT811, CAT812

Doc. No. MD-3005 Rev. S

2

© Catalyst Semiconductor, Inc.

Characteristics subject to change without notice

PIN DESCRIPTION

Pin Number

CAT811

CAT812

Name

Description

1

1

GND

Ground

2

—

RESET

¯¯¯¯¯¯

Active LOW reset. RESET

—

2

RESET

threshold.

3

3

MR

¯¯¯

Manual Reset Input. A logic LOW on MR

¯¯¯ asserts RESET. RESET remains

active as long as MR

¯¯¯ is LOW and for 140ms after MR

¯¯¯ returns HIGH. The

active low input has an internal 20kΩ pull-up resistor. The input should be

left open if not used.

4

4

Power supply voltage that is monitored.

BLOCK DIAGRAM

CAT812

RESET

+

–

RESET

&

DIGITAL

DELAY

TOLERANCE

BIAS

VOLTAGE

REFERENCE

GND

CAT811

RESET

+

–

RESET

&

DIGITAL

DELAY

TOLERANCE

BIAS

VOLTAGE

REFERENCE

GND

MR

MR