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  • TCA9539-Q1: upgrade of I2C general-purpose I/Os (GPIOs)

    Resolved
    Part Number: TCA9539-Q1 Other Parts Discussed in Thread: TCA9539 hi experts as we know that TCA9539-Q1 is Auto grade with 16 channels. do we have more channels IC for Auto application or plan for it?
    • Resolved

  • TCA9539-Q1: will INT effective when power on

    TI Thinks Resolved
    Part Number: TCA9539-Q1 Hi Expert, Assuming TCA9539-Q1 is just powered on and the I2C is not established yet, all I/O is default as input. If there is rising or falling edge on the port, will TCA9539-Q1 generate low signal on INT pin? Thanks BR, Elec…

  • TCA9539-Q1: do we have similar device but support 5V voltage supply?

    Answer Suggested
    Part Number: TCA9539-Q1 Hi Expert, Our customer has a new request. They need a I2C I/O expander with 5V supply. Do we have related auto device? Thanks. BR, Elec Cheng

  • TCA9539-Q1: Read from Register

    Answer Suggested
    Part Number: TCA9539-Q1 Other Parts Discussed in Thread: TCA9539 Hello team, I receive a question from the customer. They say that sometimes there is no ACK at the yellow line timing when the following conditions are present. Do you know the cause? 1.…

  • TCA9539-Q1: reset of TCA9539-Q1

    TI Thinks Resolved
    Part Number: TCA9539-Q1 Hi team, There are 2 questions about TCA9539-Q1: Whether a reset is needed after VCC is on Before manipulating IIC read and write, do I have to pull up reset , and then pull down reset again?

  • TCA9539-Q1: tca9539-q1

    Answer Suggested
    Part Number: TCA9539-Q1 Hi, are there any differences in the programming registers between the TCA9555 and the TCA9539? I know that there are differences in the internal pull-up, in the reset pin, in the address I2C, but I don't know if there is some…

  • TCA9539-Q1: how to use tca9539-Q1, just use read mode help

    Answer Suggested
    Part Number: TCA9539-Q1 Other Parts Discussed in Thread: TCA9539 Hi, anybody I tested tca9539-Q1. I read datasheet of tca9539. So, I understand the slave address this ic 0x74 / (A1, A0 is LOW, 1110100) and to use it only read function, 0xE9 (1110100…

  • TCA9539-Q1: Iq

    TI Thinks Resolved
    Part Number: TCA9539-Q1 Hi expert, I checked from datasheet, when I/O=input and no load, Iq as below. My question is that if I/O=output and the output level is low or high voltage, I/O connects to NMOS Gate pin. What is the Iq in this condition? Does…

  • TCA9539-Q1: What is the GPIO output state when I2C communication is abnormal disrupted?

    TI Thinks Resolved
    Part Number: TCA9539-Q1 Other Parts Discussed in Thread: TCA9539 , Dear Expert， I want to know when the TCA9539's I2C is disrupted, the GPIO will remain output level or reset to the power-on state? Thanks!
    • Answered

  • TCA9539-Q1: Input has signal before power on

    Resolved
    Part Number: TCA9539-Q1 Dear team, Due to SOC's power on sequence, we give 3.3V signal to 9539's input port before powering on 9539. Will this affect the normal operation of our chip? Thanks & Best Regards, Sherry
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