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TCA9517: About comparison btw TCA9517 and PCA9517

Vera Mao
Expert 5065 points

Part Number: TCA9517
Other Parts Discussed in Thread: PCA9517, , TCA9617B

Hi dear supporting team,

do you have the comparison table btw PCA9517 and TCA9517? TKS!

  • 0
    TI__Guru* 78301 points

    Hey Vera,

    The main difference between the PCA9517 and TCA9517 is the PCA9517 has bugs.

    Section 8.2.1 discusses the clock stretching errata

    Section 8.2.2 discusses load dependent undershoot errata

    Section 8.2.3 discusses Noise susceptibility errata

    Section 8.2.4 discusses load susceptibility errata

    TCA9517 fixes those issues which is why PCA9517 is not recommended for new design.

    On a silicon level, they are completely different devices.

    Thanks,

    -Bobby

  • 0 in reply to BOBBY
    TI__Expert 5065 points

    hi Bobby,

    thanks for the reply!

    btw, what's the difference btw TCA9617 & PCA9517? TKS!

  • 0 in reply to Vera Mao
    TI__Guru* 78301 points

    Hey Vera,

    "What's the difference btw TCA9617 & PCA9517?"

    Besides all of the errata I mentioned above about PCA9517, TCA9617B (Version A has an issue with powered off high impedance) supports 1MHz. The FETs are larger to support higher IoL sinking capabilities (up to 30mA). It has fall time accelerators and B side has a ViL of 0.4V. I believe VccB also has a lower minimum. Lastly the ESD structures are different.

    Thanks,

    -Bobby