FM1233D Datasheet

IC型號(hào)：
FM1233D
PDF描述：
3-Pin レC Supervisor Circuit
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FM1233D 3-Pin 碌C Supervisor Circuit

February 2003

FM1233D

3-Pin 碌C Supervisor Circuit

General Description

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.

The device features a precision temperature-compensated volt-

age reference and comparator. When V

falls to the threshold

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.

Features

Precision monitoring of 5V and lower voltage microprocessor

systems

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 5k

鈩?/div>

pull-up resistor

Other reset choices available: 32 to 128ms

Operating Temperature -40擄C to +105擄C

SOT23-3 package

Typical Operating Circuit

VCC

FM1233D

Controller

GND

RESET

Connection Diagram

GND

FM1233D

VCC

RESET

SOT23-3 Package

漏2002 Fairchild Semiconductor Corporation

www.fairchildsemi.com

FM1233D Rev. D

型號(hào)

版本

描述

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