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ADM706: 3 V电压监控微处理器监控电路
    ADM706P/ADM706R/ADM706S/ADM706T和ADM708R/ADM708S/ADM708T微处理器监控电路均适合监控3 V或3.3 V电源。

    ADM706P/ADM706R/ADM706S/ADM706T提供下列功能：

电源监控电路，它在启动、关断和掉电情况下产生复位输出。即使VCC低至1 V，复位输出仍然可以工作。
独立的看门狗监控电路；如果看门狗输入在1.6秒内未触发，该电路会启动。
1.25 V阈值检波器，用于电源故障警告、低电池电量检测或附加电源监控。
低电平有效去抖手动复位输入MR input.

    除了ADM706R、ADM706S和ADM706T的复位阈值监控电平分别为2.63 V、2.93 V和3.08 V以外，三者完全相同。ADM706P与ADM706R具有同样的复位阈值2.63 V，唯一不同在于前者具有高电平有效复位输出。

    ADM708R/ADM708S/ADM708T提供的功能与ADM706R/ADM706S/ADM706T相同，不同之处在于：

不提供看门狗定时器功能。
除低电平有效(RESET)输出外，还提供高电平有效复位输出(RESET)。

    所有器件均提供窄体8引脚PDIP和8引脚SOIC两种封装。

应用

微处理器系统
计算机
控制器
智能仪器
关键微处理器监控
汽车系统
电池供电系统
便携式仪器仪表

精密电源电压监控器
2.63 V (ADM706P, ADM706R, ADM708R)
2.93 V (ADM706S, ADM708S)
3.08 V (ADM706T, ADM708T)
静态电流：100 μA
复位脉冲宽度：200 ms
去抖手动复位输入(MR)
独立看门狗定时器超时，1.6秒(ADM706x)
复位输出
    高电平有效(ADM706P)
    低电平有效(ADM706R/ADM706S/ADM706T)
    同时具有高电平有效和低电平有效(ADM708R/ADM708S/ADM708T)
电压监控器，监控有无电源故障或低电池电量报警
保证RESET 有效（VCC = 1 V ）
出众的MAX706P/R/S/T、MAX708R/S/T升级产品

The ADM706P/ADM706R/ADM706S/ADM706T and the ADM708R/ADM708S/ADM708T microprocessor supervisory circuits are suitable for monitoring either 3 V or 3.3 V power supplies.

The ADM706P/ADM706R/ADM706S/ADM706T provide the following functions:

Power-supply monitoring circuitry that generates a reset output during power-up, power-down, and brownout conditions. The reset output remains operational with VCC as low as 1 V.
Independent watchdog monitoring circuitry that is activated if the watchdog input has not been toggled within 1.6 sec.
A 1.25 V threshold detector for power-fail warning, low battery detection, or to monitor an additional power supply.
An active low debounced MR input.

The ADM706R, ADM706S, and ADM706T are identical except for the reset threshold monitor levels, which are 2.63 V, 2.93 V, and 3.08 V, respectively. The ADM706P is identical to the ADM706R in that the reset threshold is 2.63 V. It differs only in that it has an active high reset output.

The ADM708R/ADM708S/ADM708T provide the same functionality as the ADM706R/ADM706S/ADM706T and only differ in that:

A watchdog timer function is not available.
An active high reset output (RESET) in addition to the active low (RESET) output is available.

All parts are available in narrow 8-lead PDIP and 8-lead SOIC packages.

Applications

Microprocessor systems
Computers
Controllers
Intelligent instruments
Critical microprocessor monitoring
Automotive systems
Battery-operated systems
Portable instruments

Precision supply voltage monitor
2.63 V (ADM706P, ADM706R, ADM708R)
2.93 V (ADM706S, ADM708S)
3.08 V (ADM706T, ADM708T)
100 μA quiescent current
200 ms reset pulse width
Debounced manual reset input (MR)
Independent watchdog timer 1.6 sec timeout (ADM706x)
Reset Output
Active high (ADM706P)
Active low (ADM706R/ADM706S/ADM706T)
Both active high and active low (ADM708R/ADM708S/ADM708T)
Voltage monitor for power-fail or low battery warning
Guaranteed RESET valid with VCC = 1 V
Superior upgrade for MAX706P/R/S/T, MAX708R/S/T
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