How to configuration / termination to use Differential or Single-Ended Inputs / Outputs for Serializer/Deserializers & Selector Muxes ?

Hi all,

Please advice to us for suggested input / output circuits.

Our customer will select following one of the Selector Muxes.

For example, using the HMC958LC5 for single-end inputs or outputs,
is the single-end ports open or termination ?

HMC958LC5
14 Gbps, 4:1 SELECTOR WITH PROGRAMMABLE OUTPUT VOLTAGE
Features
Differential or Single-Ended Inputs / Outputs

Best regards,
sss

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  • 0
    •  Analog Employees 
    on Sep 2, 2019 6:38 AM

    Hi Satoshi,

     

    You can use differential parts as single ended terminating unused pins with 50ohms to GND for HMC958.

    Speaking generally, unused input outputs having CML interface should be terminated to the CML reference(high supply rail voltage) with 50ohms.

     

    Best regards

    Sinan  

Reply
  • 0
    •  Analog Employees 
    on Sep 2, 2019 6:38 AM

    Hi Satoshi,

     

    You can use differential parts as single ended terminating unused pins with 50ohms to GND for HMC958.

    Speaking generally, unused input outputs having CML interface should be terminated to the CML reference(high supply rail voltage) with 50ohms.

     

    Best regards

    Sinan  

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