Semtech Moves 50G Fronthaul Silicon into Volume Production

Semtech has moved a portfolio of optical receiver and signal-conditioning components into volume production for 50 Gbit/s mobile-fronthaul links, providing module manufacturers with configurations for duplex, bidirectional and wavelength-division-multiplexed networks.

The production milestone covers three signal paths. For conventional duplex links extending to 10 km, Semtech pairs its GN2255 clock-and-data-recovery device with the GN1700TI transimpedance amplifier. The GN2255S and GN1700TI address bidirectional links of up to 15 km, while the GN2256 is intended for WDM and longer-reach architectures.

These devices combine technologies from Semtech’s ClearEdge, Tri-Edge and FiberEdge product families. Their role is to recover the incoming optical signal, convert photodiode current into a usable electrical signal and drive the transmitter side of a 50G optical module.

The announcement is important because it marks a change in availability rather than another radio-network roadmap. Some members of the family have previously been announced or sampled, but Semtech now describes the complete set as shipping in production volumes.

From 25G to 50G fronthaul

Mobile fronthaul connects a radio unit at the cell site with the baseband or distributed processing equipment behind it. Higher radio bandwidth, more antenna channels and greater uplink traffic increase the data rate required on this connection.

Semtech links the introduction of 50G optics to newer 5G-Advanced radio platforms from Ericsson and Nokia. It also cites a Mobile Optical Pluggables Alliance forecast that cloud-assisted AI applications could increase uplink requirements by three to five times. That forecast describes a possible traffic trend, however, and is not a performance result from Semtech’s silicon.

The three supported link arrangements address different infrastructure constraints. A duplex module uses separate fibres for transmission and reception. A BiDi module carries both directions on one fibre at different wavelengths, potentially reducing fibre requirements, while WDM architectures place multiple channels on the same fibre for additional capacity or reach.

Source Photonics is identified as a module partner using the CDR and TIA portfolio. Semtech has not disclosed production volumes, qualified module models, operator deployments or commercial pricing.

Important engineering details also remain unpublished, including component and module power, end-to-end latency, supported temperature grades, optical budgets and the qualification tests completed for each configuration. These figures will determine whether the parts meet the density, thermal and reliability requirements of deployed radio systems.

Even with those gaps, full-production status makes this a more concrete development than a prototype or standards announcement. Module and radio-system developers can now evaluate a defined set of silicon building blocks across the principal 50G fronthaul topologies.

Source:
Semtech — Semtech Enables 50G Optical Transition for AI-Driven 5G-Advanced
https://www.businesswire.com/news/home/20260920077196/en/Semtech-Enables-50G-Optical-Transition-for-AI-Driven-5G-Advanced

Credit:
Semtech