SCPS267B March 2017 – February 2020 TCA9803
The TCA980x family utilizes the current source on the B side to determine whether an external device is driving the bus low, or if it is driving the bus low itself. As such, there are some parameters that must be met to ensure a successful transmission of a low from the B-side to the A-side. These parameters are listed in Table 3.
|PARAMETER||SHORT DESCRIPTION||DETAILED INFORMATION|
|VIL||Low-level input voltage||The input voltage that is interpreted as a low. On the B-side, IILC must also be satisfied to maintain a low||See the VILC & IILC section|
|IILC||Low-level input current (contention)||The minimum amount of current that an external device must be sinking from the TCA980x to transmit a low. VIL must also be satisfied||See the VILC & IILC section|
|RILC||Low-level allowed pull-down resistance||The maximum allowed pull-down resistance of an external device in order to successful transmit a low||See the RILC section|