SLLSFO0 December 2021 TCAN1057AEV-Q1
PRODUCTION DATA
The device has internal pull-ups on critical pins which place the device into known states if the pin floats. This internal bias should not be relied upon by design though, especially in noisy environments, but instead should be considered a failsafe protection feature.
When a CAN controller supporting open-drain outputs is used, an adequate external pull-up resistor must be chosen. This ensures that the TXD output of the CAN controller maintains acceptable bit time to the input of the CAN transceiver. See Table 8-2 for details on pin bias conditions.
Pin | Pull-up or Pull-down | Comment |
---|---|---|
TXD | Pull-up | Weakly biases TXD toward recessive to prevent bus blockage or TXD DTO triggering |
S | Pull-up | Weakly biases S towards low-power silent mode to prevent excessive system power |