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RT9817 是供微处理器或数字式系统进行电源电压监测的微功耗电压检测器,同时带有含抖动滤除能力的手动复位功能。其检测阈值是内部固定的,可在 1.2V~5V 间以 0.1V 为级距进行选择,可满足绝大多数数位式应用系统的需要,工作中的耗电仅有 3μA。其电压监测功能通过在检测到 VDD 端电压低于预设阈值是送出复位信号来实现,该复位信号在 VDD 电压恢复以前将一直维持有效,在 VDD 电压越过检测阈值以后还要维持一定的时间以后才会释放。需要认为产生复位信号时,只需人为地使 MR 手动复位段的电压低于 VIL 电平即可。RT9817 的封装形式有 SC-82 和 SOT-143。
固定阈值范围:1.2V~5V,以 0.1V 为可选级距
电压检测精度:±1.5%
电流消耗:3μA
无外围元件需求
在 20μs 内复位
可选恢复延时时长:0ms/55ms/220ms/450ms
功能有效电压起点:0.9V
CMOS 推挽输出
SC-82、SOT-143 封装
符合 RoHS 规范,不含卤素
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