PCAL6408A expander equivalent, 8-bit i2c-bus/smbus i/o expander.
* I2C-bus to parallel port expander
* Operating power supply voltage range of 1.65 V to 5.5 V
* Allows bidirectional voltage-level translation and GPIO expans.
for interfacing to sensors, push buttons, keypad, etc. In addition to providing a flexible set of GPIOs, it simplifies i.
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