FM1233B

更新时间： 2024-11-17 22:40:55

品牌	Logo	应用领域
飞兆/仙童 - FAIRCHILD		监控
页数	文件大小	规格书
6页	34K
描述
3-Pin レC Supervisor Circuit

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数据手册

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FM1233B 数据手册

February 2003

FM1233B

3-Pin µC Supervisor Circuit

General Description

Features

The FM1233B 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

Monitors external pushbutton override

Internal switch debounce circuitry

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 FM1233B is of open-drain

active low type.

SOT23-3 package

The FM1233B also can monitor a switch closure on its output,

enabling it to recognize an external reset from a pushbutton

switch or a µP. In the case of a switch, the closure will be

debounced by circuitry internal to the FM1233B.

Typical Operating Circuit

VCC

FM1233B

Controller

RESET

GND

Connection Diagram

GND

VCC

FM1233B

RESET

SOT23-3 Package

FM1233B Rev. D

www.fairchildsemi.com

12 3 4 5 6

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与FM1233B相关器件

型号	品牌	获取价格	描述	数据表
FM1233BD	FAIRCHILD	获取价格	暂无描述
FM1233BDS3X	FAIRCHILD	获取价格	3-Pin レC Supervisor Circuit
FM1233BES3X	FAIRCHILD	获取价格	3-Pin レC Supervisor Circuit
FM1233BF	FAIRCHILD	获取价格	Power Supply Support Circuit, Fixed, 1 Channel, PDSO3, SOT-23, 3 PIN
FM1233BFS3X	FAIRCHILD	获取价格	3-Pin レC Supervisor Circuit
FM1233D	FAIRCHILD	获取价格	3-Pin レC Supervisor Circuit
FM1233DDES3	FAIRCHILD	获取价格	Power Supply Support Circuit, Fixed, 1 Channel, PDSO3, SOT-23, 3 PIN
FM1233DDFS3	FAIRCHILD	获取价格	Power Supply Support Circuit, Fixed, 1 Channel, PDSO3, SOT-23, 3 PIN
FM1233DDHS3	FAIRCHILD	获取价格	Power Supply Support Circuit, Fixed, 1 Channel, PDSO3, SOT-23, 3 PIN
FM1233DDS3	FAIRCHILD	获取价格	暂无描述