搜索：PCA9557
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https://www.eeworm.com/dl/899378.html
技术资料
8-bit I2C-bus and SMBus IO port with
The PCA9557 is a silicon CMOS circuit which provides parallel input/output expansion forSMBus an
https://www.eeworm.com/dl/502/31025.html
单片机编程
8-bit I2C-bus and SMBus IO port with reset
The PCA9557 is a silicon CMOS circuit which provides parallel input/output expansion for
SMBus and I2C-bus applications. The PCA9557 consists of an 8-bit input port register,
8-bit output port register, and an I2C-bus/SMBus interface. It has low current consumption
and a hig ...