Specifications
Product Family
Keystone 5nm PAM4 DSP family for 100G to 800G data center optical interconnects
MxL93682
800G PAM4 DSP with integrated driver; EML and silicon photonics; active
MxL93683
800G PAM4 DSP; 8x100G; DR8, 2xFR4, 2xLR4 and 2xVR4/SR4 applications
MxL93684
800G PAM4 DSP (KeystoneMM) with integrated VCSEL drivers for multimode AOC and short-reach optical modules
Process
TSMC 5nm CMOS
Line Rate
8x 100G per direction (800G aggregate); 56G/lane and 112G/lane options
Form Factors
QSFP-DD800 and OSFP optical modules, AEC/ACC and AOC
Integrated Drivers
Optimized for silicon-photonics direct drive and VCSEL-based multimode links
DSP Features
Transmitter digital pre-distortion (DPD), TX FIR pre-emphasis, RX FFE and DFE
Reach
DR, FR, LR and VR4/SR4 applications across 100G, 400G and 800G
Host Interface
25G, 50G and 100G per-lane Ethernet over C2M, MR and LR host channels
Power
Best-in-class link-margin performance at low power consumption
Packaging
FC-FBGA, 12 x 13 mm
TIA Portfolio
Complementary transimpedance amplifiers (TIAs) for 100G to 800G
Module Partnerships
Silicon-photonics-based pluggable 800G optical module production with Jabil using Intel silicon photonics
Applications
Data center and hyperscale cloud optical links and AI/ML cluster interconnect
Overview
MaxLinear's Keystone family of 5nm PAM4 DSPs provides the high-speed interconnect silicon that enables next-generation 100G, 400G and 800G fiber-optic modules for data center and hyperscale cloud networks.
The lineup spans the MxL93683 800G DSP for standard DR8/FR4/LR4 pluggables, the MxL93682 800G DSP with an integrated driver optimized for EML and silicon-photonics direct drive, and the MxL93684 (KeystoneMM) which monolithically integrates VCSEL drivers for multimode AOCs and short-reach modules.
All devices integrate extensive DSP functionality, including transmitter digital pre-distortion, TX FIR pre-emphasis, and receiver FFE and DFE, in a compact 12 x 13 mm FC-FBGA package. Complementary TIAs and a silicon-photonics 800G module partnership with Jabil round out the ecosystem for AI-era optical interconnect.
Key Benefits
Low power and high link margin at 800G. Integrated drivers, rich DSP equalization and a 5nm process enable dense, power-efficient 800G optical links across pluggable, AOC and co-packaged optics designs.
Applications
Hyperscale and cloud data center optical interconnect, AI/ML cluster networking, 800G optical module and AOC design, and co-packaged/on-board optics.
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