SCPS270B August 2020 – November 2023 TCA4307
PRODUCTION DATA
In the bus active mode, the I2C IN and OUT pins are connected, and the input is passed bi-directionally from IN/OUT side of the bus to the OUT/IN side respectively. The buses remain connected until the EN pin is taken low.
When the bus is connected, the driven-low side of the device is reflected on the opposite side, but with a small offset voltage. For example, if the input is pulled low to 100 mV, the output side will be pulled to roughly 160 mV. This offset allows the device to determine which side is currently being driven and avoid getting stuck low.
For the TCA4307, once a stuck bus event is detected (about 40 ms), the bus disconnects, even if EN is high.