ter output stage will drive four-terminal VCSEL transmit optical subassemblies (TOSAs) differentially using AC coupling and provides comprehensive safety shutdown functions. The driver delivers a maximum peak-to-peak modulation current of 12 mA and offers two laser control modes: open loop or digital mean-power, the latter using an integrated automatic power control (APC) loop that further reduces the functions and cost of an external microcontroller and improves startup time by removing an external interface and associated delay. On the receiving side, a high performance limiting amplifier with a 100-ohm differential input termination is directly AC-coupled to a transimpedance amplifier. The receiver chain includes a low-pass filter with programmable cutoff frequency, enabling the transceiver to support five discrete data rates in the range from 1 to 10.6 Gbps. The output of the receiver employs programmable pre-emphasis to equalize the distortion associated with the SFP+ module PCB and connector. The PHY3070 transceiver is provided in a 32-pin 5x5-mm QFN package with an operating temperature range of -40° to +95°C. It is supported by a reference module, schematics, Gerber files, SFP+ host board with GUI, and firmware. The chip can also be made available as a bare die to suit specific custom build requirements.Visit Phyworks