© Semiconductor Components Industries, LLC, 2015

July, 2015 − Rev. 3

1

Publication Order Number:

CAT811/D

CAT811

4-Pin Microprocessor

Power Supply Supervisor

with Manual Reset

Description

The CAT811 is a microprocessor supervisory circuit that monitors

power supplies. The CAT811 is a direct replacement for the MAX811

in applications operating over the industrial temperature range and has

a manual reset input.

These devices generate a reset signal, which is asserted while the

power supply voltage is below a preset threshold level and for at least

140 ms after the power supply level has risen above that level. The

underlying floating gate technology, Analog EEPROM used by

ON Semiconductor, makes it possible to offer any custom reset

threshold value. Seven industry standard threshold levels are offered

to support +5.0 V, +3.3 V, +3.0 V and +2.5 V systems. The CAT811

features a RESET push−pull output (active LOW).

Fast transients on the power supply are ignored and the output is

guaranteed to be in the correct state at Vcc levels as low as 1.0 V.

The CAT811 is fully specified over the industrial temperature range

(−40

°C to 85°C) and is available in a compact 4−pin SOT−143

package.

Features

+5.0 V (

± 5%, ± 10%, ± 20%),

+3.3 V (

± 5%, ± 10%)

over the Industrial Temperature Range

Finishes

Compliant

Applications

www.onsemi.com

PIN CONFIGURATION

See detailed ordering and shipping information in the package

dimensions section on page 9 of this data sheet.

ORDERING INFORMATION

SOT−143

BI SUFFIX

CASE 527AF

(Top View)

RESET

GND

MR

1

2

4

3

1

MARKING DIAGRAM

XXX

= Specific Device Code

M

= Month Code

G

= Pb−Free Package

(Note: Microdot may be in either location)

XXXM

G

G