BU1850MUV ic equivalent, gpio expander ic.
1) An 8-Port General purpose input/output interface 150kΩPull-down resistance. 2) NMOS Open-drain output interrupt controller with up to 1us pulse noise filter and bit ma.
GPIO expander is useful especially for the application that is in short of IO ports. It can 2 1. Control GPIO output states by I C write protocol. 2 2. Know GPIO input states by I C read protocol. Furthermore,it has the interrupt function that can re.
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