Datasheet > FM1233DEFS3

FM1233DEFS3

更新时间： 2024-11-19 10:27:07

品牌	Logo	应用领域
飞兆/仙童 - FAIRCHILD		光电二极管
页数	文件大小	规格书
7页	44K
描述
Power Supply Support Circuit, Fixed, 1 Channel, PDSO3, SOT-23, 3 PIN

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数据手册

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FM1233DEFS3 数据手册

PRELIMINARY

May 2001

FM1233D

3-Pin µC Supervisor Circuit

General Description

Features

The FM1233D is a supervisor circuit that monitors a microproces-

sor power supply or other system voltage and issues a reset pulse

when a fault condition exists. Several different threshold voltages

areofferedtoaccommodate5Vsystemswithdifferenttolerances.

I Precision monitoring of 5V and lower voltage microprocessor

systems

I V_THvalues of 4.62V, 4.38V and 4.12V

I Automatic restart of microprocessor after power failure

I 140ms (min) power-on RESET delay

I Internal 5kΩ pull-up resistor

The device features a precision temperature-compensated volt-

age reference and comparator. When V_CCfalls to the threshold

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

state. When power rises above V_TH, the reset remains for approxi-

mately 250 ms to allow the system clock and other circuits to

stabilize. The reset output of FM1233D is of open-drain active low

type.

I Other reset choices available: 32 to 256ms

I Operating Temperature -40°C to +105°C

I SOT23-3 package

Typical Operating Circuit

VCC

FM1233D

Controller

/RESET

GND

Connection Diagram

GND

VCC

FM1233D

/RESET

SOT23-3 Package

FM1233D Rev. A.1

www.fairchildsemi.com

12 3 4 5 6 7

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