ASM813LCSAF-T

更新时间： 2024-11-26 22:50:15

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描述
Low Power uP Supervisor Circuits

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数据手册

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ASM813LCSAF-T 数据手册

ASM705 / 706 / 707 / 708

ASM813L

February 2005

rev 1.5

Low Power µP Supervisor Circuits

General Description

Features

•

Precision power supply monitor

The ASM705 / 706 / 707 / 708 and AS813L are cost effective

CMOS supervisor circuits that monitors power-supply and

battery voltage level, and µP/µC operation.

•4.65V threshold (ASM705/707/813L)

•4.40V threshold (ASM706/708)

Debounced manual reset input

Voltage monitor

•

The family offers several functional options. Each device

generates a reset signal during power-up, power-down and

during brownout conditions. A reset is generated when the

supply drops below 4.65V (ASM705/707/813L) or 4.40V

(ASM706/708). For 3V power supply applications, refer to the

ASM705P/R/S/T data sheet. In addition, the ASM705/706/813L

feature a 1.6 second watchdog timer. The ASM707/708 have

both active-HIGH and active-LOW reset outputs but no

watchdog function. The ASM813L has the same pin-out and

functions as the ASM705 but has an active-HIGH reset output.

A versatile power-fail circuit has a 1.25V threshold, useful in low

battery detection and for monitoring non-5V supplies. All

devices have a manual reset (MR) input. The watchdog timer

output will trigger a reset if connected to MR.

•1.25V threshold

•Battery monitor / Auxiliary supply monitor

Watchdog timer (ASM705/706/813L)

200ms reset pulse width

•

Active HIGH reset output (ASM707/708/813L)

MicroSO package

Applications

•

Computers and embedded controllers

Portable/Battery-operated systems

Intelligent instruments

Wireless communication systems

PDAs and hend-held equipment

Automative Systems

Safety Systems

All devices are available in 8-pin DIP, SO and MicroSO

packages.

Typical Operating Circuit

Unregulated DC

+5V Regulator

µP

V_CC

R₁

V_CC

RESET

(RESET)

PFI

WDI

I/O LINE

ASM705

ASM706

(ASM813L)

NMI

WDO

PFO

R₂

INTERRUPT

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

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