PCA9518 hub equivalent, expandable five-channel i2c hub.
*1 Expandable Five-Channel Bidirectional Buffer
* 400-kHz Fast I2C Bus
* Operating VCC Range of 3 V to 3.6 V
* 5-V Tolerant I2C and Enable Input Pins to S.
The I2C protocol requires a maximum bus capacitance of 400 pF, which is derived from the number of devices on the I2C b.
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