Broadcom Sian3 | BCM83628 Broadcom Sian3 | BCM83628 Item Spotlights
NVIDIA/Mellanox MMS4A00-XM-FLT (980-9IAH0-00XM00) Compatible 1.6T 2xDR4/DR8 InfiniBand XDR Silicon Photonics Optical Transceiver (Twin-port OSFP224, Broadcom 3nm DSP – Sian3 BCM83628, 1310nm, 500m, OS2, Dual MPO-12/APC, DOM, SMF, RHS/Flat Top)
NADDOD OSFP-1.6T-2DR4FH is a 1.6Tb/s twin-port OSFP224 optical transceiver compatible with NVIDIA/Mellanox MMS4A00-XM-FLT (980-9IAH0-00XM00) , supporting InfiniBand and Ethernet networks with 2 × 800Gb/s links. It is designed for high-performance data center interconnects and next-generation HPC applications. The 1.6T OSFP 2xDR4 transceiver features a parallel 8-channel design (2 × DR4/DR8) over single-mode fiber, utilizing 200G-PAM4 electrical and optical modulation. Each port connects via a 4-channel MPO-12/APC optical connector, enabling 800Gb/s per connector. The module supports a maximum fiber reach of 500 meters over 8 single-mode fibers, providing reliable medium-distance links within the data center. The OSFP224 housing incorporates a Flat Top / RHS design for improved heat management and stable operation in densely packed switch environments.
Built on silicon photonics chip, the 1.6T OSFP 2xDR4 transceiver achieves higher integration, lower power consumption, and greater port density, while the Broadcom 3nm Sian3 (BCM83628) DSP delivers robust PAM4 signal processing with ultra-low bit error rates (BER) and stable link performance, enabling reliable, low-latency 800G/1.6T interconnects. This module is ideal for 1.6T liquid-cooled switch-to-switch interconnects, providing high-bandwidth, low-latency links in InfiniBand XDR, AI, and HPC data center networks.
| OSFP-1.6T-2DR4FH |  OSFP-1.6T-2xDR4H |  OSFP-1.6T-2FR4FH |  OSFP-1.6T-2xFR4H | |
|---|---|---|---|---|
| NVIDIA PN | MMS4A00-XM-FLT | MMS4A00-XM | / | MMS4A50-XM |
| Form Factor | OSFP224 | OSFP224 | OSFP224 | OSFP224 |
| Thermal Design | RHS/Flat Top | IHS/Closed Finned Top | RHS/Flat Top | IHS/Closed Finned Top |
| Media | SMF | SMF | SMF | SMF |
| Center Wavelength | 1310nm | 1310nm | 1310nm | 1310nm |
| Connector | Dual MPO-12/APC | Dual MPO-12/APC | Dual LC Duplex | Dual LC Duplex |
| Transmission Distance | 500m | 500m | 2km | 2km |
| 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 | ≤25W | ≤25W | ≤26W | ≤26W |
| Transmitter Type | DFB (SiPh Based) | DFB (SiPh Based) | DFB (SiPh Based) | DFB (SiPh Based) |
| Matching Cables | MTP-12 APC Type B OS2: S2MTPA12FB | MTP-12 APC Type B OS2: S2MTPA12FB | LC to LC: S2LCUD | LC to LC: S2LCUD |
| Application | 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 | 1.6T Air-Cooled Switch-to-Switch Interconnect |
