This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

ISO1042-Q1: NXP TJA1052IT/5 compatibility

Part Number: ISO1042-Q1
Other Parts Discussed in Thread: ISO1042

Hi Experts,

My customer wants to drop in replacement from TJA1052IT/5 to ISO1042. Cross reference tool says it can be drop-in replacement. There are two different pin. These pins of ISO1042 are NC. Can customer connect both NC pin to GND?

Also, which ISO1042 or ISO1042B is the best selection for TJA1052IT/5?

(STB pin of TJA1052i is not used so tied to GND)



  • Hi Uchikoshi-san,

    The NC pins of ISO1042 have no internal electrical connection.

    Hence, you can connect these pins to GND.

    ISO1042B has basic isolation and ISO1042 has reinforced isolation.

    Their isolation performances are summarized in the below table.

    I could not find the surge test rating on the TJA1052IT/5 datasheet.

    Hence, please use the following table to provide the recommendation

    base on the customer's surge rating requirement.