MAX823, MAX823L, MAX823M, MAX823R, MAX823S, MAX823T, MAX823Y, MAX823Z, MAX824, MAX824L, MAX824M, MAX824R, MAX824S, MAX824T, MAX824Y, MAX824Z, MAX825, MAX825L, MAX825M, MAX825R, MAX825S, MAX825T, MAX825Y, MAX825Z 5引脚、微处理器监控电路，带有看门狗定时器及手动复位

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Maxim > 产品 > 监控电路、电压监测器、排序器汽车电子

业内首款SOT复位IC，带有看门狗和手动复位功能

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概述

完整的数据资料 (PDF, 208kB)
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The MAX823/MAX824/MAX825* microprocessor (µP) supervisory circuits combine reset output, watchdog, and manual reset input functions in 5-pin SOT23 and SC70 packages. They significantly improve system reliability and accuracy compared to separate ICs or discrete components. The MAX823/MAX824/MAX825 are specifically designed to ignore fast transients on V_CC.

Seven preprogrammed reset threshold voltages are available (see Reset Threshold Table). All three devices have an active-low reset output, which is guaranteed to be in the correct state for V_CC down to 1V. The MAX823 also offers a watchdog input and manual reset input. The MAX824 offers a watchdog input and a complementary active-high reset. The MAX825 offers a manual reset input and a complementary active-high reset. The Selector Guide explains the functions offered in this series of parts.

关键特性 应用/使用

Precision Monitoring of +2.5V, +3V, +3.3V, and +5V Power Supplies
Operating Current:

6µA (MAX823L/M) (SC70)
2µA (MAX825T/S/R/Z/Y) (SC70)

Fully Specified Over Temperature
140ms min Power-On Reset
Guaranteed active-low RESET Valid to V_CC = 1V
Power-Supply Transient Immunity
Watchdog Timer with 1.6s Timeout (MAX823/MAX824)
Manual Reset Input (MAX823/MAX825)
No External Components

汽车电子
计算机与控制器
精确的µP监视
嵌入式控制器
智能仪表
便携式电池供电设备

Key Specifications: Supervisors (1 Monitored Voltage)
Part Number	Reset Threshold Range (V)	Active-Low Reset Output	Active-High Reset Output	Min. Reset Timeout Range	Watchdog Feature	Nom. Watchdog Timeout Range	Supervisor Features	Max. I_CC (µA)	Industry Qualified	Operating Temp. Range (°C)
MAX823	1.8 to 2.5 2.5 to 3.3 3.3 to 5.5	Push-Pull	-	85ms to 300ms	Input (WDI)	1s to 2s	Manual Reset	24	Automotive - General	-40 to +125 -40 to +85 0 to +70
MAX824			Push-Pull		Input (WDI)	1s to 2s	-	24
MAX825			Push-Pull		No Watchdog	-	Manual Reset	12
See All Supervisors (1 Monitored Voltage) (268)

*正在申请专利。

低电平有效复位，提供手动复位和看门狗定时器(MAX823)。
低电平有效复位和高电平有效复位，提供看门狗定时器(MAX824)。
低电平有效复位和高电平有效复位，提供手动复位功能(MAX825)。

图表

MAX823,MAX823L,MAX823M,MAX823R,MAX823S,MAX823T,MAX823Y,MAX823Z,MAX824,MAX824L,MAX824M,MAX824R,MAX824S,MAX824T,MAX824Y,MAX824Z,MAX825,MAX825L,MAX825M,MAX825R,MAX825S,MAX825T,MAX825Y,MAX825Z:典型工作电路
典型工作电路

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概述
关键特性
应用/使用
关键指标
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工程期刊
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参考文献： 19-0487; Rev. 5; 2006-03-14
本页最后一次更新: 2007-07-17

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