CDCDB803ERSLT

Overview

The CDCDB803ERSLT 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 features programmable integrated 85 Ω or 100 Ω differential output terminations and supports both Common Clock (CC) and Individual Reference (IR) architectures. Key electrical parameters include a maximum propagation delay of 3 ns, output-to-output skew under 50 ps, and additive phase jitter as low as 20 fs RMS after PCIe Gen 6 filtering.

Feature Summary

• Compliant with DB800ZL specification for PCIe Gen 1-6, QPI, UPI, SAS, and SATA interfaces
• Eight LP-HCSL outputs with individually controllable hardware OE# pins and SMBus configuration
• Low additive phase jitter: 20 fs RMS (PCIe Gen 6 filter), 25 fs RMS (PCIe Gen 5 filter), and 38 fs RMS (DB2000Q filter)
• Programmable output slew rate control and selectable 85 Ω or 100 Ω differential output termination

Applications

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

Procurement Notes

Verify that the component matches the specific package type and marking requirements for your assembly process. Confirm that the PCB footprint aligns with the 48-VQFN (6x6 mm) dimensions provided in the mechanical data. Ensure that the design accounts for the thermal characteristics, specifically the junction-to-ambient thermal resistance, to maintain operation within the specified -40°C to +105°C temperature range.

Selection Notes

Select this component when designing systems requiring strict adherence to the Intel DB800ZL specification for high-speed serial interfaces like PCIe Gen 6. It is suitable for applications needing individual channel enable/disable capabilities via hardware pins or SMBus. Consider the 3.3 V supply requirement and the need for external pull-up resistors for the SMBus interface when evaluating system power and control line constraints.

Part Context

The CDCDB803ERSLT belongs to the CDCDB803 family of clock buffers manufactured by Texas Instruments. It serves as a derivative of the DB800ZL standard, offering enhanced performance metrics compared to earlier generations. The 'ERSLT' suffix indicates the specific tape and reel packaging format and RoHS compliance status for this particular ordering part number.

Replacement Considerations

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