CDCDB803ERSLR

Overview

The CDCDB803ERSLR is an 8-output LP-HCSL clock buffer compliant with the DB800ZL specification, designed for PCIe Gen 1 through Gen 6 reference clock distribution. It operates on a single 3 V to 3.6 V supply and accepts differential LP-HCSL inputs up to 250 MHz. The device provides eight outputs with programmable integrated 85 Ω (default) or 100 Ω differential termination. 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

• Compliant with DB800ZL and DB2000Q specifications for PCIe Gen 1-6, QPI, UPI, SAS, and SATA interfaces.
• Features 8 LP-HCSL outputs with individually controllable hardware OE# pins and SMBus configuration.
• Supports Common Clock (CC) and Individual Reference (IR) architectures with spread spectrum compatibility.
• Includes fail-safe input protection and programmable output slew rate control.

Applications

• Microserver and tower server systems
• Storage area network (SAN) and host bus adapter cards
• Network attached storage (NAS)
• Hardware accelerators
• Rack server infrastructure

Procurement Notes

Verify the ordering suffix 'ER' corresponds to the Tape & Reel packaging format as specified in the manufacturer's orderable addendum. Confirm that the specific revision level matches the design requirements, noting that documentation revisions may affect pin descriptions or feature availability. Ensure the component meets RoHS standards if required by the target assembly process.

Selection Notes

Select this component when designing systems requiring DB800ZL compliance for high-speed serial interfaces like PCIe Gen 1-6. The choice depends on the need for low additive jitter (25 fs RMS for Gen 5) and flexible output control via both hardware pins and SMBus. Consider the 6 mm × 6 mm VQFN package constraints and the requirement for a 3.3 V supply rail during the schematic capture phase.

Part Context

The CDCDB803ERSLR belongs to the Texas Instruments CDCDB803 family of clock buffers. This series includes variants such as the CDCDB800, which serves similar buffering functions but may differ in specific compliance levels or interface configurations. The ERSLR designation specifically identifies the reel-packaged version of the standard CDCDB803 device within the product line.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult the manufacturer's official replacement guide or contact technical support directly for validated cross-references before swapping components.