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TCA9554DWTActive
Texas Instruments
8-BIT 1.65- TO 5.5-V I2C/SMBUS I/O EXPANDER WITH INTERRUPT, WEAK PULL-UP & CONFIG REGISTERS
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TCA9554 Low Voltage 8-Bit I2C and SMBus Low-Power I/O Expander With Interrupt Output and Configuration Registers datasheet (Rev. E)
Understanding the I2C Bus