FM1233BES3X Datasheet

IC型號：
FM1233BES3X
PDF描述：
3-Pin レC Supervisor Circuit
文件大小：
34.90KB
PDF頁數(shù)：
6頁
芯片廠家：
FAIRCHILD

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FM1233B 3-Pin 碌C Supervisor Circuit

February 2003

FM1233B

3-Pin 碌C Supervisor Circuit

General Description

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.

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 FM1233B is of open-drain

active low type.

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

enabling it to recognize an external reset from a pushbutton

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

debounced by circuitry internal to the FM1233B.

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

Monitors external pushbutton override

Internal switch debounce circuitry

SOT23-3 package

Typical Operating Circuit

VCC

FM1233B

Controller

GND

Connection Diagram

RESET

GND

FM1233B

VCC

RESET

SOT23-3 Package

漏2002 Fairchild Semiconductor Corporation

www.fairchildsemi.com

FM1233B Rev. D

制造商
Fairchild Semiconductor
產(chǎn)品種類
監(jiān)控電路
監(jiān)測電壓數(shù)
1
監(jiān)測電壓
4.12 V
欠電壓閾值
3.91 V
過電壓閾值
4.32 V
輸出類型
Active Low, Open Drain
人工復(fù)位
Resettable
監(jiān)視器
No Watchdog
電池備用開關(guān)
No Backup
上電復(fù)位延遲（典型值）
560 ms
Supply Voltage - Max
5.5 V
Supply Voltage - Min
1.2 V
電源電流（典型值）
6 uA
最大功率耗散
300 mW
最大工作溫度
+ 105 C
安裝風(fēng)格
SMD/SMT
封裝 / 箱體
SOT-23-3
封裝
Reel
最小工作溫度
- 40 C
功率失效檢測
No
工廠包裝數(shù)量
3000

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