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PCI2050B: PCI2050B and PCI2050

Russell Wetherley1
Expert 4255 points
Part Number: PCI2050B

Hello E2E,

I am posting on behalf of a customer.

I have been tasked with looking at the PCI2050B as a replacement for the PCI2050 in one of our products.  

 

I have read through the "comparing PCI2050B to PCI2050" document (SLAA199) but I just wanted to get some clarification and ask some questions.  

 

I think I read that the main difference is with pin 125 and and pin 102 and we would need to have a pull down on these pins in order to maintain our 33MHz operation on the bus, is that correct?  

 

Is it okay to leave pin 153 unconnected?  (It is Not Connected in our application).  

 

 One of the other things I saw was this note for P_Vccp and S_Vccp about recommending to power them up before Vcc:  

We currently have those pins all connected to the same 3.3VDC.  Will this be an issue?  

 

Do you recommend any additional capacitance be added to the Vcc pins for the 2050B part?  

 

Are there any other gotchas that aren't obvious in the datasheet?  

Thanks!

Regards,

Russell

 

  • 0
    TI__Genius 10250 points
    Hello Russel,

    Here are the answers to your questios.

    I think I read that the main difference is with pin 125 and and pin 102 and we would need to have a pull down on these pins in order to maintain our 33MHz operation on the bus, is that correct?
    -> Correct.

    Is it okay to leave pin 153 unconnected? (It is Not Connected in our application).
    -> Yes

    One of the other things I saw was this note for P_Vccp and S_Vccp about recommending to power them up before Vcc:
    We currently have those pins all connected to the same 3.3VDC. Will this be an issue?
    -> should be OK.

    Do you recommend any additional capacitance be added to the Vcc pins for the 2050B part?
    -> I don't think you need additional capacitance, since you are running it at 33 MHz only.

    Are there any other gotchas that aren't obvious in the datasheet?
    I am not aware of any!

    Regards,
    Yaser