The TCA6418E is a 18 channel GPIO expansion device with integrated ESD protection. It can
operate from 1.65 V to 3.6 V and has 18 general purpose inputs/outputs (GPIO) that can be used via
the I2C interface [serial clock (SCL), serial data (SDA)].
The major benefit of this device is it frees up the processor from having to individually
monitor changes in multiple inputs and also frees up the GPIOs on the processor to drive other
outputs.. This provides power and bandwidth savings. The TCA6418E is also ideal for usage with
processors that have limited GPIOs.
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