© Semiconductor Components Industries, LLC, 2012

May, 2012 − Rev. 10

1

Publication Order Number:

CAT853/D

CAT853, CAT859, CAT863,

CAT869

3-Pin Microprocessor

Power Supply Supervisors

Description

The CAT853, CAT863, CAT859, and CAT869 are supervisory

circuits that monitor power supplies in digital systems.

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.

Industry standard threshold levels are offered to support +3.3 V or

5.0 V systems.

The CAT859 and CAT869 feature a RESET push−pull output

(active low) for the two pinout options.

The CAT853 and CAT863 feature an open drain RESET output

(active low). Both require a pull−up resistor on the RESET output.

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

Features

5 V (−10% Power Supplies)

Applications

Table 1. THRESHOLD SUFFIX SELECTOR

Nominal Threshold Voltage

Threshold Suffix Designation

4.63 V

L

4.38 V

M

4.20 V

F

4.00 V

J

3.08 V

T

2.93 V

S

2.63 V

R

2.40 V

C

2.32 V

Z

http://onsemi.com

PIN CONFIGURATION

RESET

GND

1

See detailed ordering and shipping information in the package

dimensions section on page 8 of this data sheet.

ORDERING INFORMATION

SOT−23

TB SUFFIX

CASE 527AG

2

3

(Top Views)

CAT853, CAT859

GND

RESET

1

2

3

CAT863, CAT869

XXXMG

G

XXX

= Specific Device Code

M

= Date Code

G

= Pb−Free Package

MARKING DIAGRAM

(*Note: Microdot may be in either location)