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SN74LV4053A: SN74LV4053APW issues

Ramachandra R
Prodigy 40 points
Part Number: SN74LV4053A

Hi, 

I am using SN74LV4053A as the bridge(SMBUS) between battery charger LTC1760 and Microcontroller. Recently we are facing the issues with this MUX IC, the IC suddenly stops working and there will be the permanent short between VCC and ground. This short will not resolve with resetting the device and also causing the failure of its biasing regulator(5V) IC as well.

The below image is our implementation. Please let me know if there is any issues with it

  • 0
    Guru 317150 points

    I do not see any obvious errors in this part of the schematic.

    What can you tell us about the SCL/SDA/SMBA signals? Are there any spikes or overshoots? Can their voltage be larger than 5V_LDO at any time? Can there be noise on the 5V_LDO line?

  • 0
    TI__Genius 10552 points

    Hi Ramachandra,

    Thanks for sharing the schematic here. I don't see any immediate issues with the current layout. If the short does not resolve with a reset of the device, have you tried to perform an ABA swap? Basically switching the device for a new one and seeing if the issue goes away? Then replacing the new one with an old one again to see if the issue persists. 

    Clemens has some good questions here as well. Please let us know if you can provide feedback on these points to further dig into this issue. 

    Thanks,

    Alex

  • 0 in reply to Clemens Ladisch
    Prodigy 40 points

    The 5V_LDO line only powers this part of the circuit and does not have any noise. SCL/SDA/SMBA from the MUX are carried out of the board with short wires. Both boards are inside the device with plastic enclosures.. so we decided not to put ESD or TVS diodes. I suspect that might be the cause for some transients causing the MUX to enter into permanent latched up state. Please let me know your taught on the same

  • 0 in reply to Ramachandra R
    TI__Genius 10552 points

    HI Ramachandra,

    Thanks for the additional info. Have you already performed the ABA swap? Does the failure go away or it persists? This will allow us to find out if there's a system level issue or a device level issue. 

    Regards,

    Alex