800G OSFP112 Passive Direct Attach Copper Cable (DAC) – 112G PAM4

• Supports aggregate data rates up to 800Gbps
• Supports 112G PAM4 electrical data rates per channel
• OSFP112 form factor for high-density 800G connectivity
• Passive direct attach copper design
• Ethernet compliant with IEEE 802.3ck
• Compliant with OSFP MSA and SFF-8636
• Low crosstalk for improved high-speed signal integrity
• Low power consumption
• Supports hot plugging for convenient installation and maintenance
• I2C two-wire interface for cable identification and management
• Maximum link length up to 2 meters
• Designed for short-distance 800G interconnects
• RoHS compliant

• 800G data center switch-to-switch connections
• 800G top-of-rack (ToR) networking
• AI and GPU cluster interconnects
• High-performance computing (HPC)
• High-density Ethernet switching
• Data center spine-and-leaf architectures
• High-speed server and network equipment connectivity
• Short-distance rack and intra-rack connections
• Next-generation AI and machine learning infrastructure

OEM and ODM services are available for the 800G OSFP112 Passive DAC to accommodate specific system integration and deployment requirements. Customization options can include cable length, cable identification, labeling, EEPROM configuration, and other assembly specifications.

For volume deployments, cable assemblies can be customized to suit specific rack layouts, equipment configurations, and cable-management requirements. EEPROM and identification information can also be configured according to customer-defined host-system requirements.

Why is 112G PAM4 used in an 800G OSFP112 interface?

112G PAM4 provides the electrical lane bandwidth required for next-generation 800G interfaces. PAM4 carries two bits per symbol, allowing higher data throughput per electrical channel while supporting a practical multi-lane architecture within the OSFP112 form factor.

What are the advantages of a passive DAC for 800G applications?

A passive DAC does not require active signal-conditioning electronics within the cable assembly. This allows it to provide a relatively simple, low-power, and cost-efficient solution for short-distance connections where the host equipment can provide the required electrical signal performance.

Why is the maximum link length limited to 2 meters?

High-speed copper transmission becomes increasingly sensitive to loss and signal degradation as cable length increases, particularly at 112G PAM4 per channel. A short maximum link length helps maintain signal integrity while allowing the cable to remain a practical solution for connections within racks and between closely positioned networking devices.

What role does the I2C interface play?

The I2C two-wire interface enables compatible host equipment to access cable identification and management information. This can support system monitoring, configuration, and cable recognition without requiring a separate management connection.

Can this DAC be hot-plugged?

Yes. The cable supports hot-plug operation, allowing it to be installed or removed while compatible networking equipment remains powered. Standard equipment procedures should still be followed when performing installation or maintenance.

Is this cable suitable for AI and GPU clusters?

Yes. The combination of 800Gbps bandwidth, low power consumption, short-reach copper connectivity, and OSFP112 compatibility makes it suitable for high-density AI, GPU, and HPC networking environments where large numbers of high-speed links may be deployed.