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Showing 81 results View by: Thread Post Sort by
    Answered

  • RE: PCA9539: Pca9539 equivalent with OE or enable pin

    Resolved
    Hi Gopi, If no further questions, I will close the thread. Thanks, Regards, Tyler

  • PCA9539: PCA9539

    Part Number: PCA9539 Tool/software: HI TI Team, In my design we are using PCA9539DGVR I/O Expander and MCU (S32K144) Please check below schematic for your reference. I flashed an example code , But when I tried to capture the Signal Slave is not giving…

  • PCA9539: I2C bus failure with PCA9539 and TCA9617B

    Part Number: PCA9539 Other Parts Discussed in Thread: TCA9617B Hi, I am testing a board and see some signal integrity issues with I2C bus. In our design, we use FPGA as I2C master with open-drain on I2C bus. we have PCA9539 for IO expansion. we also have…
    • Answered

  • PCA9539: Odd behavior on startup.

    Resolved
    Part Number: PCA9539 Other Parts Discussed in Thread: TCA9548A Hi, In our design we are using a PCA9539PWR. Currently on startup we are seeing some very odd behavior that is undocumented. For context, our system is using a Nvidia Jetson Orin NX and all…
    • Resolved

  • PCA9539: Need higher ambient temp solution!!!

    TI Thinks Resolved
    Part Number: PCA9539 Other Parts Discussed in Thread: TCAL9539 , Hi team, My customer designs Outdoor AP application. And their ambient temperature will be up to 95'C at least. So do we have similar function solution with higher TA specification? Please…

  • PCA9539: TCA9539-Q1 impedance is (to VCC or to GND)? when I/O pin set as output type

    TI Thinks Resolved
    Part Number: PCA9539 Hi TI Expert The datasheet declare "If the I/O is configured as an output....low-impedance paths between the I/O pin and either VCC or GND.". The impedance of IO will be? Due to all I/O will be input hi-z state, we need to reserve…

  • PCA9539:

    TI Thinks Resolved
    Part Number: PCA9539 Other Parts Discussed in Thread: TCA9539 Output impedance PCA9539 we note a PCA9539 output trouble on insitu test, the impedance is lower than usual on PIN N°6 (PO2). the output is not high impedance On an unassembled component, we…
    • Answered

  • PCA9539: min spec of I2C input fall time ticf and output fall time tocf

    Resolved
    Part Number: PCA9539 Hello support team, Customer inquires why PCA9539 has ticf and tocf spec, could you support? They have never seen this spec in other I2C product and their usage condition is much faster than the spec, so they would like to know what…
    • Resolved

  • PCA9539: Random data read

    Answer Suggested
    Part Number: PCA9539 Other Parts Discussed in Thread: MSP430F4784 , Hi, I'm currently using PCA9539 I/O expander. interfacing with MSP430F4784, using I2C. when the IC power up (3.3), does INT pin initially low ? even though pull up is connected (10k…

  • PCA9539: Can PCA9539PWR replace TCA9539PWR directly?

    TI Thinks Resolved
    Part Number: PCA9539 Other Parts Discussed in Thread: TCA9539 HI team, Besides the VCC input range being different, Can PCA9539PWR replace TCA9539PWR directly? thx
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