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  • Unexpect output state of PCA9557

    Other Parts Discussed in Thread: PCA9557 Hi all, We encountered an unexpected behavior with PCA9557. An I2C write command was issued by our controller followed by an I2C Write/Read command to do the validation. Sometimes, we got a validation failure case…
    • Answered

  • PCA9557: How can the device work in standby mode?

    Resolved
    Part Number: PCA9557 Hi expert, Our customer want to use our PCA9557. They want to know how can the device work in standby mode? Do they need to set it up, or will the device automatically enter standby mode when I2C idea? Thanks Best Regards Sean
    • Resolved

  • PCA9557: Is there any limitation on the voltage that can be connected to pull up of open drain pin I/O0 (P0)?

    Answer Suggested
    Part Number: PCA9557 We are using PCA9557 and want to pull up the I/O0/P0 to 1.8V. The device is powered by 3.3V in our board. I want to confirm if there is any limitation on the P0 (which is specifically open drain pin) pull up voltage since the pin…
    • Answered

  • PCA9557: Is there any difference between the PCA9557RGVR & PCA9557RGYR?

    Resolved
    Part Number: PCA9557 Hi Team There is a good new that we DIN PCA9557 But cause PCA9557RGVR is out of stock, could you share the difference between PCA9557RGVR & PCA9557RGYR ? THX
    • Resolved

  • PCA9557: Spice model for running simulation in virtuoso

    Part Number: PCA9557 Hi, I need the spice model(.CIR file) for PCA9557PWR The one which is available on ti.com is the encrypted model. I need the unencrypted one, as i want to create a symbol for this component and then use it in a test bench.

  • PCA9557: IBIS model for PCA9557

    TI Thinks Resolved
    Part Number: PCA9557 Other Parts Discussed in Thread: TCA9538 Hello, Customer is asking whether we have IBIS model about PCA9557, so would you like to help us check whether we have it? Thanks, Antony
    • Answered

  • PCA9557: about thermal resistance, Rjt, Rjc and Rjb

    Resolved
    Part Number: PCA9557 Hi dear experts, Would you please provide PCA9557 Rjt, Rjc and Rjb information to me? Datasheet only lists Rja. Plus, what is the max Junction temp of PCA9557. Thanks very much for your reply in advance. BR, Joyce Li
    • Resolved
    • Answered

  • PCA9557: communication time out

    Resolved
    Part Number: PCA9557 Hello expert, I have question for PCA9557's behavior regarding SMBus communication time out. My customer observed that PCA9557 hasn't happened time out even if adding more than 25ms wait between Reg addr and write data. I think…
    • Resolved

  • DRV8425: Generating Hi-Z control signals

    Part Number: DRV8425 Other Parts Discussed in Thread: TCAL6416 , PCA9557 Tool/software: Dear all I am hoping to implement DRV8425 in a design where we wish to have digital control over what stepping mode is used with the M0/M1 pins. I don't expect to…

  • PCA9557: Please, help to reproduce a chip getting stuck on Power-on-Reset (errata 10.1 from the datasheet)

    Part Number: PCA9557 We have PCA9557 stuck mysteriously in one of our designs. Now we are aware that there is a PoR errata, that the chip may get "stuck". In order to decide if this is the issue that affects our customers, we need to reproduce it first…

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