Broadcom Sian3 | BCM83628 Broadcom Sian3 | BCM83628 Item Spotlights
NVIDIA/Mellanox MMS4A50-XM (980-9IAS0-00XM00) Compatible 1.6T 2xFR4 InfiniBand XDR Optical Transceiver (Twin-port OSFP224, Broadcom 3nm DSP – Sian3 BCM83628, 1310nm, 2km, OS2, Dual LC Duplex, DOM, SMF, IHS/Closed Finned Top)
NADDOD OSFP-1.6T-2xFR4H is a high-speed, low-latency optical transceiver designed for 1.6Tbps data center interconnects and InfiniBand XDR networks. It supports link distances up to 2km over single-mode fiber (SMF) using a 2xFR4 architecture with two LC duplex ports, each carrying 4x200G PAM4 channels, delivering 800G per port and an aggregate bandwidth of 1.6Tbps.
The transceiver integrates a Broadcom 3nm DSP (Sian3 BCM83628) with NADDOD's self-developed silicon photonics chipset, enabling ultra-low bit error rates (BER), robust signal integrity, and high end-to-end link reliability at 1.6T speeds. Optimized for 1.6T InfiniBand XDR switch-to-switch interconnects, the OSFP-1.6T-2xFR4H is fully validated for interoperability with NVIDIA Quantum-X800 air-cooled switches, making it an ideal optical connectivity solution for supercomputing systems, high-density GPU clusters, and HPC data center environments.
As XDR network bandwidth continues to increase, long-reach links place higher demands on power efficiency and link stability. NADDOD 1.6T 2xFR4 transceiver features a co-design of Broadcom 3nm DSP (BCM83628) and self-developed silicon photonics chips, delivering lower power consumption, better thermal performance, and more stable links at a 2km distance. Compared with common 5nm DSP solutions, the transceiver reduces power consumption by over 20%, significantly easing thermal pressure on high-density switches, lowering port failure rates, and ensuring long-reach link stability.
NADDOD 1.6T 2×FR4 transceiver features an LC connector and a Closed Top housing, designed for NVIDIA Quantum‑X800 (Q3400‑RA/Q3200‑RA) switch interconnects. The LC connector keeps interfaces clean, enables quick replacement of same-interface patch cords, thereby improving maintenance efficiency. The Closed Top housing protects the transceiver's fins in data center and campus long‑reach interconnects, optimizes heat dissipation, and suppresses EMI, ensuring excellent signal integrity in high-density deployments.
| OSFP-1.6T-2xFR4H |  OSFP-1.6T-2FR4FH |  OSFP-1.6T-2xDR4H |  OSFP-1.6T-2DR4FH | |
|---|---|---|---|---|
| NVIDIA PN | MMS4A50-XM | / | MMS4A00-XM | MMS4A00-XM-FLT |
| Form Factor | OSFP224 | OSFP224 | OSFP224 | OSFP224 |
| Thermal Design | IHS/Closed Finned Top | RHS/Flat Top | IHS/Closed Finned Top | RHS/Flat Top |
| Media | SMF | SMF | SMF | SMF |
| Center Wavelength | 1310nm | 1310nm | 1310nm | 1310nm |
| Connector | Dual LC Duplex | Dual LC Duplex | Dual MPO-12/APC | Dual MPO-12/APC |
| Transmission Distance | 2km | 2km | 500m | 500m |
| Electrical Modulation | 8x212Gb/s PAM4 | 8x212Gb/s PAM4 | 8x212Gb/s PAM4 | 8x212Gb/s PAM4 |
| Optical Modulation | Two ports 4x212Gb/s PAM4 | Two ports 4x212Gb/s PAM4 | Two ports 4x212Gb/s PAM4 | Two ports 4x212Gb/s PAM4 |
| Power Consumption | ≤26W | ≤26W | ≤25W | ≤25W |
| Transmitter Type | DFB (SiPh Based) | DFB (SiPh Based) | DFB (SiPh Based) | DFB (SiPh Based) |
| Matching Cables | LC to LC: S2LCUD | LC to LC: S2LCUD | MTP-12 APC Type B OS2: S2MTPA12FB | MTP-12 APC Type B OS2: S2MTPA12FB |
| Application | 1.6T Air-Cooled Switch-to-Switch Interconnect | 1.6T Liquid-Cooled Switch-to-Switch Interconnect | 1.6T Air-Cooled Switch-to-Switch Interconnect; 1.6T Air-Cooled Switch–to–800G ConnectX-8 HCA Interconnect | 1.6T Liquid-Cooled Switch-to-Switch Interconnect |
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