Pin DescriptionsPinSignal NameDescriptionPlug Seq.Notes1VEETTransmitter Ground1 2TX FAULTTransmitter Fault Indication3Note13TXDISABLETransmitter Disable3Note24SDASDA Serial Data Signal3 5SCLSCL Serial Clock Signal3 6MOD_ABSModule Absent. Grounded within the module3 7RS0Not Connected3 8LOSLoss of Signal3Note 39VEERReceiver ground1 10VEERReceiver ground1 11VEERReceiver ground1 12RD-Inv. Received Data Out3Note 413RD Received Data Out3Note 414VEERReceiver ground1 15VCCRReceiver Power Supply2 16VCCTTransmitter Power Supply2 17VEETTransmitter Ground1 18TD Transmit Data In3Note 519TD-Inv. Transmit Data In3Note 520VEETTransmitter Ground1 Notes:Plug Seq.: Pin engagement sequence during hot plugging.1) TX Fault is an open collector output, which should be pulled up with a 4.7k~10kΩ resistor on the host board to a voltage between 2.0V and Vcc 0.3V. Logic 0 indicates normal operation; Logic 1 indicates a laser fault of some kind. In the low state, the output will be pulled to less than 0.8V.2) Laser output disabled on TDIS >2.0V or open, enabled on TDIS <0.8V.3) LOS is open collector output. Should be pulled up with 4.7k~10kΩ on host board to a voltagebetween 2.0V and 3.6V. Logic 0 indicates normal operation; logic 1 indicates loss of signal.4) RD-/ : These are the differential receiver outputs. They are internally AC-coupled 100 differential lines which should be terminated with 100Ω (differential) at the user SERDES.5) TD-/ : These are the differential transmitter inputs. They are internally AC-coupled, differential lines with 100Ω differential termination inside the module.
