MAX1232CPA 微處理器監(jiān)控器

出處：ipman 發(fā)布于：2007-04-20 15:47:43

MAX1232CPA 微處理器監(jiān)控電路

概述

The MAX1232 microprocessor (µP) supervisory circuit provides µP housekeeping and power-supply supervision functions while consuming only 1/10th the power of the DS1232. The MAX1232 enhances circuit reliability in µP systems by monitoring the power supply, monitoring the software execution, and providing a debounced manual reset input. The MAX1232 is a plug-in upgrade of the Dallas DS1232.

A reset pulse of at least 250ms duration is supplied on power-up, power-down, and low-voltage brownout conditions (5% or 10% supply tolerances can be selected digitally). Also featured is a debounced manual reset input that forces the reset outputs to their active states for a minimum of 250ms. A digitally programmable watchdog timer monitors software execution and can be programmed for timeout settings of 150ms, 600ms, or 1.2s. The MAX1232 requires no external components.

關(guān)鍵特性

應(yīng)用

Consumes 1/10th the Power of the DS1232
Precision Voltage Monitor—Adjustable +4.5V or +4.75V
Power-OK/Reset Pulse Width—250ms Min
No External Components
Adjustable Watchdog Timer—150ms, 600ms, or 1.2s
Debounced Manual Reset Input for External Override
Available in 8-Pin PDIP/SO and 16-Pin Wide SO Packages

	汽車系統(tǒng)
	計(jì)算機(jī)
	控制器
	高µP電源監(jiān)視
	智能儀表

Key Specifications: Microprocessor Supervisors

Part Number

Number of Monitored Voltages

Reset Threshold Range (V)

Active-Low Reset Output

Active-High Reset Output

Min. Reset Timeout Range

Watchdog Feature

Nom. Watchdog Timeout Range

Supervisor Features

Reset Thresh. Acc. (% at +25°C)

Max. I_CC (µA)

Package

Package Type

Operating Temp. Range (°C)

MAX1232

3.3 to 5.5

Open Drain

85ms to 300ms

Input (WDI)

1s to 2s <1s adjustable

Manual Reset

2.5

200.0

8/PDIP
8/SOIC
16/SOIC

Plastic DIP SOIC

-40 to +85 -55 to +125 0 to +70

注釋

Microprocessor Monitor with Watchdog

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關(guān)鍵詞：MAX1232CPA 微處理器監(jiān)控器MAX1232CPADS1232MAX1232MAX6316MAX6320MAX6357MAX6358MAX6359MAX6360MAX6351MAX6352MAX6353MAX6354MAX6355MAX6356MAX6321MAX6322MAX6317MAX6318MAX6319MAX6316M

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