SCPS237 June 2018 TCA9517-Q1
For the TCA9517-Q1 to function correctly, all devices on the B-side must be able to pull the B-side below the voltage input low contention level (VILC). This means that the VOL of any device on the B-side must be below
VOL of a device can be adjusted by changing the IOL through the device which is set by the pull-up resistance value. The pull-up resistance on the B-side must be carefully selected to ensure that logic levels will be transferred correctly to the A-side.
Multiple A sides of TCA9517-Q1s can be connected in a star configuration, allowing all nodes to communicate with each other.
To further extend the I2C bus for long traces/cables, multiple TCA9517-Q1s can be connected in series as long as the A-side is connected to the B-side. I2C bus slave devices can be connected to any of the bus segments. The number of devices that can be connected in series is limited by repeater delay/time-of-flight considerations on the maximum bus speed requirements.