Broadcom Sian3 | BCM83628 Broadcom Sian3 | BCM83628 Item Spotlights
NVIDIA/Mellanox MMS4A50-XM (980-9IAS0-00XM00) Compatible 1.6T 2xFR4/FR8 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 2 km over single-mode fiber (SMF) using a 2×FR4 architecture with two LC duplex ports, each carrying 4×200G 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.
The NADDOD OSFP-1.6T-2xFR4H transceiver has been thoroughly undergone rigorous testing in our in-house test center by using the new-gen NVIDIA Quantum-X800 Q3400-RA XDR switch with 144 ports of 800Gb/s connectivity over 72 OSFP cages, demonstrating low bit error rate for ensuring data integrity and stable operation under high-throughput workloads, successfully verifying seamless interoperability with XDR switches and proving ultimate reliability in high-speed network connectivity for next-generation data centers and HPC infrastructures.
| 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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