Copyright

 ANPEC Electronics Corp.

Rev. A.2 - Oct., 2003

APR3021/2/3

www.anpec.com.tw

1

ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise

customers to obtain the latest version of relevant information to verify before placing orders.

MicroPower Microprocessor Reset Circuit

Features

General Description

Applications

The APR3021/2/3 are designed to monitor voltage

supplies in

µP and digital systems. The quiescent

current is extremely low, typically 1.5 µA, making it

ideal for portable battery operated equipment. The

APR3021/2/3 operate by monitoring the system

power supply voltage. When the input voltage drops

below a fixed threshold, the device asserts a reset

signal for a fixed time period after Vcc rises above

the fixed threshold. The APR3021/2/3 series is avail-

able with three output stage versions : APR3021

push-pull active low output, APR3022 push-pull ac-

tive high output and APR3023 open drain active low

output. They are also designed to reject fast line tran-

sient glitches on Vcc. The APR3021/2/3 are come in

a miniature SOT-23, SOT-23-5, SOT-89 packages.

Pin Configuration

SOT-23 (Top View)

Re s e t

12

3

GN D

Re s e t

(3021/3 )

(3022)

SOT-23-5 (Top View)

SOT-89 (Top View)

GND

NC

NC

12

3

4

5

Reset

Reset

(3021/3)

(3022)

GND

2

13

Reset

Reset

(3021/3)

(3022)

V

CC

2.32V, 2.63V, 2.93V, 3.08V, 3.9V, 4.38V.

- Open-drain output

- CMOS active high output

- CMOS active low output