3 and OIF CEI-112G-LINEAR-PAM4 specifications. It enables Ethernet-like links with 1, 2, 4, or 8 lanes for data centers, using low power, high port density, low cost, and low latency pluggable transceiver modules in form factors such as QSFP . It builds on IEEE 802. 125 GBd PAM4 optical interfaces, optical links using standard single-mode fiber with up to 500 m reach, and host-module electrical interfaces for hosts with DSP based SerDes and RS(544,514) FEC. It. Last November, Credo Semiconductor was first to announce a transmit-only 800G PAM4 DSP for half-retimed modules, which are now known as linear-receive optics (LRO). At OFC, Marvell joined the LRO bandwagon with Spica Gen2-T, a transmit-only version of its 5nm 800G DSP. The company claims the new. The Marvell® PAM4 optical DSP portfolio, including Spica™ and Nova™ DSPs, addresses the critical the need for high-bandwidth optical interconnects to power AI infrastructure. Marvell leads the pluggable module ecosystem with low-power, high-performance silicon for AI, cloud, enterprise and 5G. Semtech announced the demonstration of 100Gbps/lane linear pluggable optical links featuring Semtech's PAM4 PMDs from its FiberEdge product line and from its new DirectEdge brand, focused specifically on LPO (Linear Pluggable Optics) applications. DirectEdge™ and FiberEdge® PMDs enable Linear Drive. A key new modulation scheme, PAM4, was introduced around 2017 and enabled the big jump from 100G to 400G. When it comes to enabling 400G and higher Ethernet speeds, a four-level pulse amplitude modulation or PAM4 multilevel signaling is needed as opposed to the non-return-to-zero (NRZ) modulation. NADDOD OSFP-800LPO-2DR4 is a cost-effective module with high performance, which is optimized for AI Datacenter, supporting datarate of 8x112Gb/s PAM4 Optical interface and 8x112Gb/s PAM4 Electrical interface.