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TB3R1 Connections

Eleanor Judd
Prodigy 10 points
Other Parts Discussed in Thread: TB3R1, TB5R1, TB3R2

Hi,

I am designing a board that needs to receive differential PECL signals, and convert them to 3.3V TTL signals. The board needs to fit into an existing system, where the PECL signals are driven by 5V Agere BDG1A parts. Can I use the Texas Instruments 3.3V TB3R1 Quad Differential PECL Receiver to do all this, or do I need to use a 5V receiver (e.g. TB5R1) and then a 5V->3.3V level translator?

thanks

Eleanor Judd

 

  • 0
    TI__Expert 7850 points

    Eleanor,

     

    If you are looking to replace Agere devices  such as BRF1A, BRF2A, BRS2A, or BRS2B with low voltage equivalents then the TB3R1 (BRF1A, BRF2A) and TB3R2 (BRS2A, BRS2B) are the correct devices to consider.

     

    The max input voltage range is specified up to 5.3V.  The key is to make sure the PECL driver signal does not violate any of the input specifications for the TB3R1/TB3R2 devices.

     

    Thanks for considering TI.

     

    Regards,

     

    Atul Patel

    Texas Instruments