Other Parts Discussed in Thread: TCAN1044A-Q1,
Tool/software:
Physical Layer Requirements
1. Communication Rate: 500Kbps.The CAN controller obtains the clock source from an external quartz crystal, and the crystal frequency is an integer multiple of the CAN communication rate:CAN communication rate error: ±0.2%;
2. Node ID uses extended frame.
3. The CAN bus transceiver circuit needs to meet the requirement of not being damaged by contact discharge of +8KV.
4. The CAN bus transceiver circuit needs to meet the requirement of not being damaged by air discharge of ±15KV.
5. The CAN bus transceiver needs to be driven by +5V voltage.
6. The CAN bus transceiver circuit needs to reserve a 120Ω termination resistor, whether it is surface-mounted or not is TBD.
7. A 100V 1s pulse voltage is applied 1000 times between CAN H, CAN L, and GND (power battery), with an interval of 60s between each pulse. The CAN circuit and communication function must not be damaged.
8. If there are nodes with input/output voltages exceeding 24V, the CAN circuit needs to be electrically isolated from the voltage.
9. Transceiver voltage withstand level of 50V or above
key1:Please recommend suitable chips for the above requirements.
key2:Regarding point 8, please provide a detailed explanation on how to achieve electrical isolation between the CAN circuit and the voltage exceeding 24V. Ideally, a reference design or other detailed information would be appreciated. Thank you!
