CDCDB803RSLT

Overview

The Texas Instruments CDCDB803RSLT is an 8-output LP-HCSL clock buffer compliant with the DB800ZL specification. It distributes reference clocks for PCIe Gen 1 through Gen 6, QPI, UPI, SAS, and SATA interfaces. The device operates on a single 3 V to 3.6 V supply and features a differential input with a maximum frequency of 250 MHz. Key electrical parameters include a maximum propagation delay of 3 ns, output-to-output skew under 50 ps, and additive phase jitter of 25 fs RMS after the PCIe Gen 5 filter. It is housed in a 48-pin VQFN package measuring 6 mm × 6 mm.

Feature Summary

• Supports PCIe Gen 1-6, QPI, UPI, SAS, and SATA reference clock distribution
• 8 LP-HCSL outputs with programmable 85 Ω (default) or 100 Ω differential terminations
• Additive phase jitter: <25 fs RMS (PCIe Gen 5 filter), <38 fs RMS (DB2000Q filter)
• Individual hardware OE# controls and SMBus interface for configuration

Applications

• Microserver and tower server systems
• Storage area network and host bus adapter cards
• Network attached storage devices
• Hardware accelerators
• Rack servers

Procurement Notes

Verify the RSLT suffix indicates the Tape & Reel packaging format. Confirm that the specific revision matches the required PCIe Gen 6 compliance if applicable. Ensure the order quantity aligns with the reel specifications provided by the manufacturer.

Selection Notes

Select this component when designing systems requiring low additive jitter for high-speed serial interfaces like PCIe Gen 5/6. The device supports both Common Clock and Individual Reference architectures. Verify that the system power supply remains within the 3 V to 3.6 V range for optimal performance.

Part Context

The CDCDB803RSLT belongs to the CDCDB803 family of clock buffers from Texas Instruments. It serves as a derivative of the DB800ZL standard, meeting or exceeding its system parameters. The 'RSLT' suffix specifically denotes the 48-VQFN package type and tape & reel shipping method.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.