ASM1816 datasheet(1/9 Pages) ALSC

Il numero della parte	ASM1816

Spiegazioni elettronici	Low Power 3.3V/3.0V uP Reset, Active LOW, Open-Drain Output

PDF	9 Pages

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Produttore elettronici	ALSC [Alliance Semiconductor Corporation]

Homepage	https://www.alliancememory.com

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1 / 9 page

ASM1816

Alliance Semiconductor

2575 Augustine Drive . Santa Clara, CA 95054 . Tel: 408.855.4900 . Fax: 408.855.4999 . www.alsc.com

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

rev 1.4

Low Power 3.3V/3.0V µP Reset, Active LOW, Open-Drain Output

February 2005

General Description

The ASM1816 is a voltage supervisory device with low-power,

3.3V/3V µP Reset, active LOW, open-drain output. Maximum

supply current over temperature is a low 15µA (at 3.6V).

The ASM1816 generates an active LOW reset signal whenever

the monitored supply is out of tolerance. A precision reference

and comparator circuit monitor power supply (VCC) level.

Tolerance level options are 5%, 10% and 20%. When an out-of-

tolerance condition is detected, an internal power-fail signal is

generated which forces an active LOW reset signal. After VCC

returns to an in-tolerance condition, the reset signal remains

active for 150ms to allow the power supply and system

microprocessor to stabilize.

The ASM1816 is designed with a open-drain output stage and

operates over the extended industrial temperature range.

Devices are available in TO-92 and compact surface mount

SOT-23 packages.

Other low power products in this family include the ASM1810/

11/12/15/17, ASM1233D and ASM1233M.

Key Features

•

Low Supply Current

•20 µA maximum (5.5 V)

•15µA maximum (3.6 V)

•

Automatically restarts a microprocessor after power failure

•

150ms reset delay after VCC returns to an in-tolerance con-

dition

•

Active LOW power-up reset

•

Precision temperature-compensated voltage reference and

comparator

•

Eliminates external components

•

TO-92 and compact surface mount SOT-23 package

•

Operating temperature -40°C to +85°C

Applications

•

Set-top boxes

•

Cellular phones

•PDAs

•

Energy management systems

•

Embedded control systems

•

Printers

•

Single board computers

Typical Application

Block Diagram

Microprocessor

VCC

RESET

GND

ASM1816

VCC

Supply

Reference

Delay

150ms

Typical

Tolerance

Bias

+

-

2

ASM1816

VCC

Supply

Delay

150ms

Typical

Tolerance

Bias

-

GND

RESET

Reference

+

1

3

5.0KΩ

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