ZHCSLW4A March 2020 – September 2020 TCAN1046-Q1
PRODUCTION DATA
The TCAN1046 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 |
|---|---|---|
| TXD1 and TXD2 | Pull-up | Weakly biases TXD1 and TXD2 towards recessive to prevent bus blockage or TXD DTO triggering |
| STB1 and STB2 | Pull-up | Weakly biases STB1 and STB2 towards low-power standby mode to prevent excessive system power |