Compatible Cisco SFP-25G-SR-S 25GBASE-SR SFP28 transceiver transmits 25.78125 Gb/s over OM4 to 100 m (70 m over OM3) using Duplex LC/UPC on 50/125 µm MMF and 850 nm VCSEL optics. It is a hot-pluggable SFP28 MSA form factor with metal, with a typical power consumption of <1 W and max power of 1 W. It supports the I2C-DOM/DDM feature for temperature, Vcc, TX and RX power, and bias.
This conforms to SFF-8431 and SFF-8472 and IEEE 802.3by 25GBASE-SR and is RoHS lead-free. The module supports 10/25G operation on existing multi-mode fiber cable with support for a 100G-to-4×25G breakout migration. The operating range is 0–70° C commercial temperature.
Compatible brands and part numbers include: Cisco SFP-25G-SR-S; Juniper Networks QFX-SFP-25G-SR; Arista SFP-25G-SR; Mellanox MMA2P00-AS; Dell 407-BBWK; Extreme Networks 25G-SFP28-SR; H3C SFP-25G-SR-MM850; Intel E25GSFP28SR; Generic SFP-25G-SR.
This part is pre-programmed with unique serials and tested for application and traffic performance, and it will interoperate with other 25G interfaces that are compliant with IEEE standards. Typical use cases are for data center 25G Ethernet, campus networks, telecom, and 100G→25G breakouts.
Specifications
| Brand | BYXGD |
| Form Factor | SFP28 |
| Max Data Rate | 25.78125 Gbps |
| Modulation | NRZ |
| Wavelength | 850 nm |
| Media | MMF (OM3/OM4) |
| Core Size | 50/125 µm |
| Max Distance | 70 m (OM3), 100 m (OM4) |
| Connector | Duplex LC/UPC |
| Transmitter Type | VCSEL |
| Receiver Type | PIN |
| TX Power Range | -8.4 to +2.4 dBm |
| Receiver Sensitivity (Min) | < -10.3 dBm |
| Receiver Overload | > +2.4 dBm |
| Power Budget | 1.9 dB |
| Extinction Ratio | > 2.0 dB |
| CDR | TX & RX built-in CDR |
| FEC | Inbuilt FEC support |
| DDM/DOM | Support |
| Power Consumption | ≤ 1.0 W |
| Packaging Technology | COB Packaging |
| Operating Temperature | 0 to 70°C (32 to 158°F) |
| Storage Temperature | -40 to 85°C |
| Operating Humidity | 5%–85% (non-condensing) |
| Storage Humidity | 5%–95% (non-condensing) |
| Protocol Compliance | SFP28 MSA; IEEE 802.3by (25GBASE‑SR); SFF‑8472, SFF‑8024, SFF‑8431, SFF‑8432; CPRI; eCPRI |
| Cable Compatibility | OM3/OM4 MMF; supports 10G/25G operation on existing MMF |
| Digital Interface | I2C management interface |
| Dimensions (L×W×H) | 56.7 × 13.9 × 8.5 mm |
| Enclosure | Metal enclosure (lower EMI) |
| Environmental & Safety | RoHS, CE, REACH; lead‑free |
| Applications | 10G/25G Ethernet; CPRI 10; 100G to 4×25G breakout |
| Warranty | 5 Years |
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