Intel LTA8531-PE-IN MMF Optical Transceiver
The Intel LTA8531-PE-IN is a 100G QSFP28 SR4 optical transceiver designed for short-reach multimode links in data center, cloud, and enterprise core networks. It targets infrastructure buyers and system integrators interconnecting servers, switches, and storage within a rack or between adjacent rows, where 100GBASE-SR4 over OM4 multimode fiber delivers the lowest per-port optics cost at 100G speeds. The 4 × 25 Gbps parallel-optics VCSEL design keeps power draw at ≤ 2.5 W, which helps maintain thermal headroom on densely populated switch line cards. Note that as an SR4 module it requires an MPO/MTP-12 multimode patch cable and a matching SR4 port on the far end, so plan your fiber plant and order matched pairs accordingly.
Key specifications
| Parameter | Specification |
|---|---|
| Model | Intel LTA8531-PE-IN |
| Product Type | QSFP28 Optical Transceiver |
| Data Rate | 100 Gbps |
| Ethernet Standard | 100GBASE-SR4 |
| Form Factor | QSFP28 (hot-pluggable) |
| Transmission Distance | Up to 100 m over OM4 MMF (shorter reach on lower-grade multimode; verify against your cable plant) |
| Wavelength | 850 nm |
| Connector Type | MPO/MTP (12-fiber ribbon, 4 lanes each direction) |
| Fiber Type | Multimode Fiber (MMF) |
| Channel Configuration | 4 × 25 Gbps parallel optics |
| Modulation Format | NRZ |
| Optical Technology | VCSEL Array |
| Power Consumption | ≤ 2.5 W |
| Operating Temperature | 0°C to 85°C |
| Compliance Standards | QSFP28 MSA, IEEE 802.3bm |
| Hot-Pluggable | Yes (swap without powering down the host system) |
| Monitoring Function | DOM/DDM supported (real-time optical power and temperature telemetry via the host switch) |
| Application | Data Center, High-Speed Ethernet, Cloud Networking |
Typical workloads
- Top-of-rack to leaf-spine uplinks: 100G SR4 runs within a rack or between adjacent rows over existing OM4 trunk cabling, using the MPO/MTP connector for fast patching.
- Cloud and hyperscale compute fabrics: high port-count leaf and spine switches benefit from the module’s ≤ 2.5 W power profile and standard QSFP28 MSA footprint.
- Storage area and high-speed Ethernet links: connecting 100G server adapters to ToR switches in short-distance deployments where multimode fiber is already installed.
- Lab and staging environments: hot-pluggable QSFP28 with DOM/DDM telemetry allows link power and temperature validation during bring-up without external test gear.
Frequently asked questions
Q: What cabling do I need for this transceiver?
A: The LTA8531-PE-IN uses an MPO/MTP-12 multimode connector with 4 lanes in each direction, so it requires quality MPO/MTP multimode patch cables on both ends. It reaches up to 100 m over OM4 fiber; if your plant uses lower-grade multimode, verify reach before deployment.
Q: Will it work with my switch?
A: The module follows the QSFP28 MSA and IEEE 802.3bm, so it generally interoperates with QSFP28 SR4 ports on common data center switch platforms. However, some vendors enforce coded or whitelisted optics, so confirm your switch vendor’s third-party optics policy before ordering.
Q: Can I pair it with a single-mode module such as PSM4 or LR4 on the other end?
A: No. 100GBASE-SR4 requires a matching SR4 transceiver at the far end, since it transmits over parallel multimode lanes at 850 nm rather than serial single-mode optics. Order matched SR4 pairs and validate the link after installation using the supported DOM/DDM telemetry.
The Intel LTA8531-PE-IN is a 100G QSFP28 SR4 optical transceiver designed for short-reach multimode links in data center, cloud, and enterprise core networks. It targets infrastructure buyers and system integrators interconnecting servers, switches, and storage within a rack or between adjacent rows, where 100GBASE-SR4 over OM4 multimode fiber delivers the lowest per-port optics cost at 100G speeds. The 4 × 25 Gbps parallel-optics VCSEL design keeps power draw at ≤ 2.5 W, which helps maintain thermal headroom on densely populated switch line cards. Note that as an SR4 module it requires an MPO/MTP-12 multimode patch cable and a matching SR4 port on the far end, so plan your fiber plant and order matched pairs accordingly.
Key specifications
| Parameter | Specification |
|---|---|
| Model | Intel LTA8531-PE-IN |
| Product Type | QSFP28 Optical Transceiver |
| Data Rate | 100 Gbps |
| Ethernet Standard | 100GBASE-SR4 |
| Form Factor | QSFP28 (hot-pluggable) |
| Transmission Distance | Up to 100 m over OM4 MMF (shorter reach on lower-grade multimode; verify against your cable plant) |
| Wavelength | 850 nm |
| Connector Type | MPO/MTP (12-fiber ribbon, 4 lanes each direction) |
| Fiber Type | Multimode Fiber (MMF) |
| Channel Configuration | 4 × 25 Gbps parallel optics |
| Modulation Format | NRZ |
| Optical Technology | VCSEL Array |
| Power Consumption | ≤ 2.5 W |
| Operating Temperature | 0°C to 85°C |
| Compliance Standards | QSFP28 MSA, IEEE 802.3bm |
| Hot-Pluggable | Yes (swap without powering down the host system) |
| Monitoring Function | DOM/DDM supported (real-time optical power and temperature telemetry via the host switch) |
| Application | Data Center, High-Speed Ethernet, Cloud Networking |
Typical workloads
- Top-of-rack to leaf-spine uplinks: 100G SR4 runs within a rack or between adjacent rows over existing OM4 trunk cabling, using the MPO/MTP connector for fast patching.
- Cloud and hyperscale compute fabrics: high port-count leaf and spine switches benefit from the module’s ≤ 2.5 W power profile and standard QSFP28 MSA footprint.
- Storage area and high-speed Ethernet links: connecting 100G server adapters to ToR switches in short-distance deployments where multimode fiber is already installed.
- Lab and staging environments: hot-pluggable QSFP28 with DOM/DDM telemetry allows link power and temperature validation during bring-up without external test gear.
Frequently asked questions
Q: What cabling do I need for this transceiver?
A: The LTA8531-PE-IN uses an MPO/MTP-12 multimode connector with 4 lanes in each direction, so it requires quality MPO/MTP multimode patch cables on both ends. It reaches up to 100 m over OM4 fiber; if your plant uses lower-grade multimode, verify reach before deployment.
Q: Will it work with my switch?
A: The module follows the QSFP28 MSA and IEEE 802.3bm, so it generally interoperates with QSFP28 SR4 ports on common data center switch platforms. However, some vendors enforce coded or whitelisted optics, so confirm your switch vendor’s third-party optics policy before ordering.
Q: Can I pair it with a single-mode module such as PSM4 or LR4 on the other end?
A: No. 100GBASE-SR4 requires a matching SR4 transceiver at the far end, since it transmits over parallel multimode lanes at 850 nm rather than serial single-mode optics. Order matched SR4 pairs and validate the link after installation using the supported DOM/DDM telemetry.
