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DP83640 connect with SFP

user3468065
Prodigy 202 points
Other Parts Discussed in Thread: DP83640

Hi, Dear all:

The recommended circuit for a 100 Mb/s fiber pair interface in the datasheet of the DP83640 is following:

The following is the recommended circuit of SFP:

When DP83640 is connected whit the SFP, whether or not need the pull-ups or pull-downs resistance?

  • 0
    TI__Expert 4811 points

    Hi,

    For pull up and pull down resistance depend on chip internal design. form the SFP suggest circuit, SFP integrated AC cap and DC recover circuit.  

    DP83640 exteranl need pull up and down resistance network.

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