目前有个应用需要产生如下时序:在电源5V上电后(大于4V左右),首先延迟约500ms(20%误差)产生一个低到高电平,然后再延迟50ms(10%误差)左右产生一个低到高的电平。即一路输入(5V电源),两路输出(延迟上电信号)。一旦5V掉电,两路输出复位为低。
电源5V :___|``````````````````````````````````````````````|______
输出1 :____________|``````````````````````````````|______
输出2 :____________________|````````````````|______
时间 : |---500ms--|---50ms--|
请问如何挑选电源监控芯片来满足该时序,希望芯片体积尽量小,电路尽量简单,有何芯片可推荐?