TJA1145A, TJA1145AFD, and TJA1145T/FD CANFD communication maximum baud rate issue

[zhaoning]

Hi NXP experts，

As shown in the pictures below, we have three types of CAN transceiver chips, TJA1145A, TJA1145AFD, and TJA1145T/FD. Currently, we have tested all three types of chips with silk screen printing, and they can all communicate normally at 5Mbit/s for CANFD communication. However, we found that the maximum CANFD speed for TJA1145 and TJA1145A in the manuals are 2M and 5M, respectively. We would like to confirm if all three types of chips we purchased can be used at a speed of 5M. Which datasheet corresponds to the model numbers of these chips, JTA1145 or TJA1145A?

[JozefKozon · Accepted solution]

Hi Zhao,

the TJA1145A and TJA1145A/FD can work reliably at speed up to 5Mbit/s. The older TJA1145 and TJA1145/FD can work reliably at speed up to 2Mbit/s. Please refer to the individual datasheets. 

https://www.nxp.com/docs/en/data-sheet/TJA1145A.pdf for TJA1145A

https://www.nxp.com/docs/en/data-sheet/TJA1145.pdf for TJA1145

The timings and reliability of the TJA1145 are not guaranteed above the 2Mbit/s.

With Best Regards,

Jozef