TCA9617B: About I2C specifications

The TCA9617B itself is not an I²C device, i.e., it does not have its own I²C address. It just passes through I²C signals between the two sides, and does not have any requirements for their timing.

When you insert the TCA9617B between other I²C devices, then the signals are slowed down due to the propagation delays (see section 5.6). This can affect the setup/hold time requirements of these other devices.

Kashiwa-San,

Correct, TCA9617B is an I2C buffer. 

The timing requirements are found on page 7 of 28 in the datasheet: 

This describes the prop delays and transition times for each side of the buffer. 

Regards,

TYler

Thank you for your response.