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 ?
HMC958LC514 Gbps, 4:1 SELECTOR WITH PROGRAMMABLE OUTPUT VOLTAGEFeaturesDifferential or Single-Ended Inputs / Outputs
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.