This product is a QSFP+ Optical transceiver for 4 x10 Gb/s optical links. It operates at 10.3125Gb/s up to 100m over OM3 multimode optical fiber and 150m over OM4 fiber. The optical transmitter portion of the transceiver incorporates a 4 channels VCSEL array, a 4 channels input buffer and laser driver, diagnostic monitors, control and bias blocks. For module control, the control interface incorporates a Two Wire Serial interface of clock and data signals. Diagnostic monitors for VCSEL bias, module temperature, TX power， RX power and supply voltage are implemented and results are available through the Two Wire Serial interface. Alarm and warning thresholds are established for the monitored attributes. Flags are set and interrupts generated when the attributes are outside the thresholds. All flags are latched and will remain set even if the condition initiating the latch clears and operation resumes. The optical output will squelch for loss of input signal unless squelch is disabled. 

The optical receiver portion of the transceiver incorporates a 4 channels PIN photodiode array, a 4 channels TIA array, a 4 channel output buffer, diagnostic monitors. Alarm and warning thresholds are established for the monitored attributes. Flags are set and interrupts generated when the attributes are outside the thresholds. All flags are latched and will remain set even if the condition initiating the flag clears and operation resumes. All interrupts can be masked and flags are reset upon reading the appropriate flag register. The electrical output will squelch for loss of input signal (unless squelch is disabled) and channel de-activation through Two Wire Serial interface.