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CCS/TCA9535: Can TCA9535/PCA9535 replace NXP PCA9535PW directly?

Abin Huang
Prodigy 120 points
Part Number: TCA9535
Other Parts Discussed in Thread: PCA9535

Tool/software: Code Composer Studio

Hi E2E,

How to replace NXP PCA9535PW with TI TCA9535 or PCA9535?

There is a software system work with NXP PCA9535PW on Intel platform.

I would like to change NXP one with TI's.

I heard that it could be done by correct the different Register map and check the digital signal.

Can you list total difference in register, bit meaning, pins and every thing has effect on replacement?

Thank you!!!

  • 0
    TI__Guru 62920 points

    Hi Abin,

    These two devices actually have the same internal register map and bit definitions and so software changes should not be required.  Between the two TI options, I'd recommend going with the TCA9535 due to the improvements made in performance (for example, the lower-voltage support).  Please just be careful to follow the power supply ramp requirements detailed in Section 10 of the datasheet.

    If you have any further questions please let us know.

    Regards,
    Max