Datasheet > TC1232CUA

TC1232CUA

更新时间： 2024-11-24 01:06:11

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美国微芯 - MICROCHIP		/
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描述
Microprocessor Monitor

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数据手册

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TC1232CUA 数据手册

TC1232

Microprocessor Monitor

Features:

General Description:

• Precision Voltage Monitor:

- Adjustable +4.5V or +4.75V

• Reset Pulse Width – 250 ms minimum

• No External Components

The TC1232 is a fully-integrated processor supervisor

that provides three important functions to safeguard

processor sanity: precision power on/off Reset control,

Watchdog Timer and external Reset override.

On power-up, the TC1232 holds the processor in the

Reset state for a minimum of 250 ms after V_CCis within

tolerance to ensure a stable system start-up.

• Adjustable Watchdog Timer:

- 150 ms, 600 ms or 1.2s

• Operating Voltage 4.0V to 5.5V

Microprocessor sanity is monitored by the on-board

watchdog circuit. The microprocessor must provide a

periodic low-going signal on the ST input. Should the

processor fail to supply this signal within the selected

time-out period (150 ms, 600 ms or 1200 ms), an out-

of-control processor is indicated and the TC1232

issues a processor Reset as a result.

• Debounced Manual Reset Input for External

Override

Block Diagram

V_CC

RST

Tolerance

Select

The outputs of the TC1232 are immediately driven

active when the PB input is brought low by an external

push button switch or other electronic signal. When

connected to a push button switch, the TC1232

provides contact debounce.

–

TOL

(5% or 10%)

V_REF

–

The TC1232 is packaged in a space-saving 8-Pin PDIP

or SOIC package, a 16-Pin SOIC (wide) package and

requires no external components.

Reset

Generator

PB RST

Debounce

Watchdog

Timebase

Select

Watchdog

Timer

Package Types

8-Pin PDIP

8-Pin SOIC

16-Pin SOIC (Wide)

PB RST

16 NC

PB RST

VCC

14 NC

13 ST

12 NC

11 RST

10 NC

TCC11223322

TC1232

TOL

RST

TOL

RST

TC1232

GND

TOL

GND

RST

Device Features

RST pin

Minimum

Reset

Active Time

(ms)

WDI Input

Typical

Timeouts (ms)

Trip Points

Active

(Max)

Input

Device

Type

Pull-up Active

Resistor Level

Type

Level

TC1232 Open-drain External Low

Push-pull

High

4.75V

or 4.5V

250

150, 600 or

1200

Yes

 2002-2014 Microchip Technology Inc.

DS20001370E-page 1

12 3 4 5 6 7...24

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