This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

SN65LBC184: Can this device work with 5V +/-10% power supply?

Part Number: SN65LBC184

Hi team,

The recommended supply voltage of SN65LBC184 is 5V +/-5%. This is not typical. Typically a 5V RS485 interface device is specified for 5V +/-10% supply. I do not know why? This kind of requirement will complicated the design of isolated dc/dc for RS485, since most of 5V to 5V isolated dcdc module is +/-10. 

My customer wants to know is it possible to power SN65LBC184 with 5V +/-10% supply? is there any potential issue or performance degradation?

Thank you,

John

  • John,

    There is no reliability concern if SN65LBC184 works with a 5V+-10% supply. The drawback is that some spec of the datasheet might not be guaranteed in some corner conditions. If the design has enough margin (for example Vod, timing), the system would still work. If there is any specific parameter you care about, please let me know. I will see if I could find more data.

    Regards,
    Hao