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DS125BR820: P2P Device Consult

Stanley Dai
Expert 5810 points
Part Number: DS125BR820
Other Parts Discussed in Thread: DS125BR800A,

Hi Team,

Customer is looking for direct replacement solution for DS125BR820N because of device shortage. Could you pls help us check on that? Thanks.

Best,

Stanley

  • 0
    TI__Mastermind 18821 points

    Hi Stanley,

    Can you provide more information about the customer use case?  Specifically, what protocol and data rate are they using this device for and what SMBus mode are they using?

    Thanks,
    Drew

  • 0 in reply to Drew Miller1
    TI__Expert 5810 points

    Hi Drew:

    Below is the detailed application:

    Date rate ：SAS3.0 ，6 channel; Device Functional Modes：Slave SMBus Mode（ENSMB = 1）

    Best,

    Stanley

  • +1 in reply to Stanley Dai
    TI__Mastermind 18821 points

    Hi Stanley,

    I think the best part for replacement would be DS125MB800A.  These devices are very similar, but it is possible that the customer may need to use a slightly different register configuration.

    Specifically, pin 21 on DS125BR800A is a mode pin while on DS125BR820 this is a reserved pin.  It may be necessary to adjust for this by either using the appropriate pullup resistor or SMBus register settings.  Please see the following excerpt from the datasheet.

    Please keep in mind that you will want to use DS125MB800A in linear mode.  I also noticed that the EQ Control register in the datasheet varied between the parts, so it may be necessary to use different EQ Control values.

    Thanks,

    Drew