PCIe 3.0 x4 Male to x4 Female Extension Cable with Supporting SMBUS

The PCIe 3.0 x4 Male to x4 Female Extension Cable with SMBus Support is a specialized passive interconnect solution designed for applications requiring not only PCIe signal extension but also System Management Bus (SMBus) communication capabilities. This cable maintains the full x4 lane configuration, supporting a total bandwidth of approximately 3.94 GB/s (at PCIe 3.0 speeds of 8.0 GT/s per lane) while integrating SMBus signals (SMBCLK and SMBDAT) for enhanced device management and monitoring. Engineered with impedance-controlled wiring (85-ohm differential target) and multi-layer shielding, it ensures signal integrity for both high-speed PCIe data transfers and critical SMBus communication. The inclusion of SMBus support makes this cable ideal for advanced server platforms, test environments, and embedded systems where real-time hardware telemetry, power management, or firmware updates are required.

Features

• Full x4 Lane Support: Preserves all four PCIe lanes, delivering maximum bandwidth (~3.94 GB/s) for devices such as NVMe SSDs, network controllers, or specialized accelerators.
• SMBus Integration: Supports SMBCLK (clock) and SMBDAT (data) signals, enabling system management functions including temperature monitoring, power control, and device identification.
• Enhanced Shielding: Utilizes foil and braid layers to minimize crosstalk and EMI, critical for maintaining integrity of both PCIe and low-frequency SMBus signals.
• Passive Design: Requires no external power or active components, leveraging high-quality copper conductors and precise impedance control for reliable operation.
• Durable Construction: Features gold-plated contacts (e.g., ?0.76µm) and reinforced connectors rated for ?500 insertion cycles, with strain relief for mechanical robustness.
• Hot-Plug Compatibility: Incorporates PRSNT1# and PRSNT2# detection pins for safe hot-plug operations in supported systems.

Specifications

• Product Model: PCIe 3.0 x4 Male to x4 Female Extension Cable with SMBus Support
• Connector A: PCIe 3.0 x4, Male, Edge Connector
• Connector B: PCIe 3.0 x4, Female, Receptacle
• Supported Buses: PCI Express 3.0/2.0/1.0 + SMBus 2.0/3.0
• Cable Type: Passive Copper Extension
• Data Rate: Up to 8.0 GT/s (PCIe 3.0)
• Bandwidth: ~3.94 GB/s (x4 configuration)
• SMBus Signals: SMBCLK (clock), SMBDAT (data) – optional per PCIe spec but implemented in this cable
• Impedance: 85 ohms differential (PCIe lanes); SMBus compatible with 3.3V logic levels
• Shielding: Dual-layer foil and braid
• Wire Gauge: 28–30 AWG (PCIe lanes); 26 AWG (SMBus signals)
• Operating Temperature: -20°C to +85°C (industrial grade)
• Hot-Plug Pins: PRSNT1, PRSNT2 (necessary for hot-plug functionality)
• Compliance: RoHS, PCI-SIG mechanical and electrical standards

Applications

• Server Management: Enables SMBus-based monitoring of PCIe devices (e.g., GPUs, FPGAs) in data centers for predictive maintenance and power optimization.
• Test and Validation Benches: Facilitates debugging of PCIe and SMBus interactions during hardware development, allowing signal probing for both data and management paths.
• Industrial Computing: Supports PCIe expansion in ruggedized systems with SMBus telemetry for environmental monitoring (temperature, voltage) in critical applications.
• High-Performance Workstations: Allows flexible placement of x4 cards (e.g., RAID controllers) while maintaining SMBus connectivity for firmware updates or diagnostics.