Hello,
I am unfamiliar with CAN bus and had some basic layout questions.
I have a design using a transceiver (TCAN334). I put the transceivers right next to the main connector to keep the output lines short.
1) Regarding the differential outputs (CANnH/CANnL), I am rationalizing that since the lines are so short, I a) don't need to worry about differential routing/ trace length matching, and b) don't need to worry about microstrip layout design or having a controlled impedance for the PCB. In the layout picture, the connector holes are 100mil pitch.
2) Regarding the inputs (CnRX and CnTX), these are as high speed as the outputs, but single-ended. Because the xcvrs are so close to the connector, that makes them fairly far from the MCU (~15 inches!). Do these need transmission line design, necessitating controlled board impedance/material stackup?
This thread makes it seem I don't need to worry, but I am unsure:
https://electronics.stackexchange.com/questions/228377/can-bus-layout-design
Thanks,
m121212
I am unfamiliar with CAN bus and had some basic layout questions.
I have a design using a transceiver (TCAN334). I put the transceivers right next to the main connector to keep the output lines short.
1) Regarding the differential outputs (CANnH/CANnL), I am rationalizing that since the lines are so short, I a) don't need to worry about differential routing/ trace length matching, and b) don't need to worry about microstrip layout design or having a controlled impedance for the PCB. In the layout picture, the connector holes are 100mil pitch.
2) Regarding the inputs (CnRX and CnTX), these are as high speed as the outputs, but single-ended. Because the xcvrs are so close to the connector, that makes them fairly far from the MCU (~15 inches!). Do these need transmission line design, necessitating controlled board impedance/material stackup?
This thread makes it seem I don't need to worry, but I am unsure:
https://electronics.stackexchange.com/questions/228377/can-bus-layout-design
Thanks,
m121212