INTEGRATED CIRCUITS PCA9534 8-bit I2C and SMBus, .
PCA9534 - 8-bit I2C and SMBus/ low power I/O port
PCA9534A - Remote 8-BIT I2C and SMBus Low-Power I/O Expander
PCA9534 - Remote 8-Bit I2C and SMBus Low-Power I/O Expander