9DB803DGLF

Overview

The Renesas Electronics 9DB803DGLF is an 8-output differential clock buffer designed for PCI Express Gen2 applications. It operates within a supply voltage range of 3.135 V to 3.465 V and supports maximum input frequencies up to 400 MHz. The device features zero propagation delay, HCSL output signaling, and is housed in a 48-pin SSOP package. It functions as a fanout buffer or zero-delay buffer, driven by main clock generators such as the CK410B+, CK505, or CK509B.

Feature Summary

• Provides 8 differential HCSL outputs for PCIe Gen2 clock distribution
• Supports zero delay buffer mode and fanout mode with bandwidth programming
• Operates with spread spectrum modulation tolerance (0 to -0.5% down, +/- 0.25% center)
• Cycle-cycle jitter less than 50 ps with phase jitter under 3.1 ps rms for PCIe Gen2

Applications

• PCI Express Gen2 system clock distribution
• Server and storage backplane clock buffering
• High-speed digital interface synchronization

Procurement Notes

Verify the specific suffix 'GLF' against official Renesas documentation to confirm RoHS compliance and lead-free status. Confirm the package variant corresponds to the SSOP-48 form factor rather than TSSOP-48, as pinouts may differ between these packages within the same family. Ensure compatibility with existing PCB footprints before procurement.

Selection Notes

Select this component when eight synchronized differential clocks are required for PCIe Gen2 architectures. It requires a compatible differential input source from a main clock generator. Verify that the operating temperature range of -40°C to +85°C meets system environmental requirements. Compare against the 9DB803DFILF if TSSOP packaging is preferred over SSOP.

Part Context

The 9DB803DGLF belongs to the 9DB803 series of differential buffers. It serves as a successor or alternative to earlier models like the discontinued 9DB108BFLF. The part is specifically engineered to meet Intel DB800v2 Differential Buffer Specification standards for high-performance computing platforms.

Replacement Considerations

The 9DB803DFILF is a direct functional substitute with identical electrical characteristics but utilizes a TSSOP-48 package instead of SSOP-48. Verify mechanical footprint compatibility before substitution.