Texas Instruments (TI) has supported the highly efficient I2C bus interface for many years. This overview provides an updated look at I2C applications and how TI’s I/O expanders, multiplexers, buffers and repeaters can help system designers achieve effective subsystem communications using proven I2C devices. The I2C bus is useful for many of today’s microcontroller and microprocessor-based systems or other systems linking many I/O devices.