MIC1832NY

更新时间： 2024-11-28 10:57:27

品牌	Logo	应用领域
麦瑞 - MICREL		光电二极管监控输入元件 PC
页数	文件大小	规格书
7页	147K
描述
μP Supervisory Circuit

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MIC1832NY 数据手册

MIC1832

Micrel, Inc.

MIC1832

µP Supervisory Circuit

General Description

Features

The MIC1832 is a multifunction circuit which monitors mi-

croprocessor activity, external reset and power supplies in

microprocessor based systems. The circuit functions include

awatchdogtime,powersupplymonitor,microprocessorreset,

and manual pushbutton reset input.

• Power OK/Resettime delay, 250ms min.

• Watchdog timer, 150ms, 600ms, or 1.2s typical

• Precision supply voltage monitor, select between 5% or

10% of supply voltage

• Avaiable in 8-pin surface mount (SO)

• Debounced External reset input

The power supply line is monitored with a comparator and

an internal voltage reference. /RST is forced low when an

out-of-tolerance condition exists and remains asserted for

• Low supply current, <18µA typical

Applications

• Autimotive systems

• Intelligent systems

• Critical microprocessor power monitoring

• Battery powered computers

• Controllers

at least 250ms after V rises above the threshold voltage

(2.55V or 2.88V). The /RST pin will remain logic low with

as low as 1.4V.

The Watchdog input (/ST) monitors µP activity and will as-

sert /RST if no µP activity has occurred with in the watchdog

timeout period. The watchdog timeout period is selectable

with nominal period of 150, 600, 1200 milliseconds.

Ordering Information

Part Number

Pb-Free

Temperature Range

Package

Standard

MIC1832N

MIC1832M

MIC1832NY

MIC1832MY

–40ºC to +85ºC

8-Pin PDIP

8-Pin SOIC

Typical Application

MIC1832

µP

PBRST

RST

GND

I/O

RESET

TOL

Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

January 2006

MIC1832

12 3 4 5 6 7

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