FM1233DES3

更新时间： 2024-11-18 13:07:47

品牌	Logo	应用领域
飞兆/仙童 - FAIRCHILD		监控
页数	文件大小	规格书
7页	34K
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数据手册

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FM1233DES3 数据手册

February 2003

FM1233D

3-Pin µC Supervisor Circuit

General Description

Features

The FM1233D is a supervisor circuit that monitors a micropro-

cessor power supply or other system voltage and issues a reset

pulse when a fault condition exists. Several different threshold

voltages are offered to accommodate 5V systems with different

tolerances.

Precision monitoring of 5V and lower voltage microprocessor

systems

V values of 4.62V, 4.38V and 4.12V

Automatic restart of microprocessor after power failure

140ms (min) power-on RESET delay (typ.: 256ms)

Internal 5kΩ pull-up resistor

The device features a precision temperature-compensated volt-

age reference and comparator. When V falls to the threshold

Other reset choices available: 32 to 128ms

Operating Temperature -40°C to +105°C

SOT23-3 package

voltage, a RESET pulse is issued, holding the output in the

active state. When power rises above V , the reset remains for

approximately 250 ms to allow the system clock and other cir-

cuits to stabilize. The reset output of FM1233D is of open-drain

active low type.

Typical Operating Circuit

VCC

FM1233D

Controller

RESET

GND

Connection Diagram

GND

VCC

FM1233D

RESET

SOT23-3 Package

FM1233D Rev. D

www.fairchildsemi.com

12 3 4 5 6 7

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