MACOM targets SFP28 short reach transceivers with transmitter/receiver chips

MACOM Technology Solutions Inc. has unveiled new semiconductors aimed at SFP28 short-reach optical transceivers. The new devices include the MATA-37644, a multi-rate 28G CDR with trans-impedance amplifier (TIA) and limiting amplifier (LA), and the MALD-37645, a multi-rate 28G CDR with VCSEL driver and input equalizer. The devices combine to meet transmit and receive requirements for 25G Ethernet, 32G Fibre Channel, and CPRI optical modules.

Both chips are available in die form for wire-bonding assembly and feature high-performance, reference-free CDRs that can be bypassed to support legacy or non-standard data rates. The CDRs retime at 25 to 28.1 Gbps, 21 to 25.3 Gbps, and "divide by two" data rates. The semiconductors can be individually controlled through the 2-wire serial interface and consume little power, MACOM says.

The MATA-37644 features a high-sensitivity TIA with selectable bandwidth control to support legacy data rates, and an output driver with programmable output swing and 2-tap de-emphasis. The MALD-37645 supports programmable bias and modulation current, which enables interoperability with a variety of VCSEL lasers. It also has an adaptive input equalizer to support flexible VSR connections to host ASICs.

"MACOM's latest chipset solution is enabling the development of low-cost and low-power SFP28 short-reach optical modules," said Charlie Wang, vice president of R&D at Innolight Technology Corp. "We are excited to work with MACOM to deliver best in class enterprise and data center optical interconnectivity to customers."

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