MAX1232微处理器监测器

升级后的MAX1232使功耗降低10倍

状态

状况：生产中。

概述

完整的数据资料 (PDF, 516kB)

英文下载
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.

关键特性 应用/使用

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

汽车系统

计算机

控制器

精确的µP电源监控

智能仪表

Key Specifications: Supervisors (1 Monitored Voltage)

Part Number Reset Thresh.
(V) Reset Out Reset Out t_RESET Watchdog Feature Watchdog Timeout Supervisor Features Reset Thresh. Accur.
(%) I_CC
(µA) Price

Active Low Active High min @ +25°C max See Notes

MAX1232 3.3 to 5.5 Open Drain Open Drain 85ms to 300ms Input (WDI)

1s to 2s

<1s

Adjustable
Manual Reset 2.5 200 $1.71 @1k

查看所有 Supervisors (1 Monitored Voltage) (274)

图表

典型工作电路

source：ShenZhen henlito electronic co.,ltd.

web:www.henlito.com