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TCA6416A vs TCA9539

Takumi Suzuki1
Mastermind 8420 points
Other Parts Discussed in Thread: TCA6416A, TCA9539, TCA9555, IO-EXPANDER-EVM

Hi,

I would like to ask you the difference between TCA6416A and TCA9539.

The difference seems to be I2C address setting...Are there any other differnce?

And if you know other apropriate devices like TCA6416A/9539, please let me know.

Thank you in advance.

Best Regards, 

  • 0
    TI__Mastermind 30260 points

    The TCA9539 does not offer voltage translation (in other words, the I2C bus and P-port GPIOs have to operate at the same voltage).

    The TCA6416A does offer voltage translation, where VCCI supplies power to the I2C interface and VCCP provides power to the P-port GPIOs.

    The TCA9555 is a device which is similar to the TCA9539, but it also contains internal 100kOhm pull-up resistors on each P-port GPIO.

    All of these device can be evaluated using the IO-EXPANDER-EVM, which comes with the TCA9539 installed. In order to evaluate the TCA9555 or the TCA6416A, you would need to also order FREE samples and manually swap out the units. The GUI and MSP430 LaunchPad (sold separately for only $10) firmware handles the different slave addresses automatically.

  • 0 in reply to Brian Berner
    Mastermind 8420 points

    Hi Brian-san,

    Thank you very much for your explanation.

    I understood well.

    Best Regards,