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PCA9557RGYRActive
Texas Instruments
8-BIT 2.3- TO 5.5-V I2C/SMBUS I/O EXPANDER WITH RESET & CONFIG REGISTERS
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PCA9557 Remote 8-Bit I2 C and SMBus Low-Power I/O Expander With Reset and Configuration Registers datasheet (Rev. K)
Logic Guide (Rev. AB)