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  • PCA9538: Default output values

    Answer Suggested
    Part Number: PCA9538 Tool/software: Hi team, Wanted to clarify what the default output is on reset? I see this on the datasheet and want to make sure this is the right thing to look at: Additionally, is it possible to get rid of the 1M pulldowns if…
    • Answered

  • PCA9538: Leakage in case I2C pull up to 5V with VCC = 3.3V

    Resolved
    Part Number: PCA9538 Other Parts Discussed in Thread: TCA9538 Will there be any leakage current from SDA/SCL external pull up 5.25V to VCC =3.3V. Datasheet of TCA9538 mentions absolute maximum Vin to be 6V but it also recommend s V_ih max = Vcc in there…
    • Resolved
    • Answered

  • PCA9538: standby mode and question on additional current in standby mode

    Resolved
    Part Number: PCA9538 Hi Team, In datahseet, PCA9538 have operation mode and standby mode. Does we need a specificed I2C command to make PCA9538 entered standby mode? If not, could you help to confirm when will PCA9538 enter standby mode. In datasheet…
    • Resolved
    • Answered

  • RE: PCA9538: Device not initializing to power-on default register values

    Resolved
    Clearer capture of PCA9538 Vcc during startup resulting in corrupted default register values. The first 3 power-up/decay cycles are inadvertent and I don't expect the PCA9538 to work at any time during those. The last Vcc ramp and held on (right edge…

  • PCA9538: does this part support schmitt trigger

    TI Thinks Resolved
    Part Number: PCA9538 Hi team, May I know does PCA9538 support schmitt trigger? Thank you.
    • Answered

  • PCA9538: Question of RESET PIN

    Resolved
    Part Number: PCA9538 Hi team, Customer has a question about RESET PIN connect to VCC through a pullup resistor. Their RESET PIN connect to VCC through a pullup resistor. When power on, do they need to add a capacitor on the pull-up resistor to delay for…
    • Resolved
    • Answered

  • PCA9538: Description of datasheet

    Resolved
    Part Number: PCA9538 Hi Team, In the Datasheet of the device "PCA9538", page 6, top table. In the last row of the table where it says "Cb", the units are "ns" where it should be "pF". Am I right? www.ti.com/.../pca9538…
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    • Answered

  • PCA9538: During I2C read/write, values are being read and written strangely.

    Resolved
    Part Number: PCA9538 Using PCA9538, I constructed the circuit as follows, but I have some questions. 1. In the datasheet, the default value of Register 1 is 0xFF, The default value of Register 3 was 0xFF. However, when reading with I2C, Register…
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    • Answered

  • PCA9538: INT pin setting

    Resolved
    Part Number: PCA9538 Hi all, A question about PCA9538 INT behavior below, 1. Our GPIO P0-7 are all LOW in standby mode. (by external HW logic) so the default input value is "0000 0000" 2. when power on , P0-7 is 1111 1100. (P0-P5 is Pull…
    • Resolved

  • PCA9538: PCA9538 " INT "pin application

    Part Number: PCA9538 Dear Sir, PCA9538 Pin13(/INT) if not used, can connect to GND ? Thanks!

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