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PCA9515A: Newer device

Taku Murayama
Intellectual 1830 points
Part Number: PCA9515A
Other Parts Discussed in Thread: PCA9515B, , TCA9800, TCA9509, TCA9517

Tool/software:

Hi,

Could you tell me the newer recommendation device against PCA9515ADR?

BR,

Taku

  • 0
    Guru 316690 points

    The web site recommends the PCA9515B, but it is not available in the SOIC package.

    The PCA9515x has a static voltage offset on both sides. Newer devices like the TCA9517(A) or TCA9509 have an offset only on one side, which is usually preferred (but it does not make a difference in existing circuits that already work with the PCA9515A). The TCA9800/1/2/3 uses a current source instead of a voltage offset, which canresult in better signal quality, but you must not use pull-up resistors on the B side.

  • 0
    TI__Mastermind 47308 points

    Hi Taku,

    Please let me know if you have any more questions. Clemens provided a good answer. 

    Regards,

    Tyler