1 Features

• 8 LP-HCSL outputs with programmable integrated

85-Ω (default) or 100-Ω differential output

terminations

• 8 hardware output enable (OE#) controls

• Additive phase jitter after PCIE Gen 6 filter: 20 fs,

RMS (maximum)

• Additive phase jitter after PCIE Gen 5 filter: 25 fs,

RMS (maximum)

• Additive phase jitter after DB2000Q filter: 38 fs,

RMS (maximum)

• Supports Common Clock (CC) and Individual

Reference (IR) architectures

– Spread spectrum-compatible

• Output-to-output skew: < 50 ps

• Input-to-output delay: < 3 ns

• Fail-safe input

• Programmable output slew rate control

• 9 selectable SMBus addresses

• 3.3-V core and IO supply voltages

• Hardware-controlled low power mode (PD#)

• Current consumption: 72 mA maximum

• 6-mm × 6-mm, 48-pin VQFN package

2 Applications

• Microserver & tower server

• Storage area network & host bus adapter card

• Network attached storage

• Hardware accelerator

• Rack server

3 Description

The CDCDB803 is a 8-output LP-HCSL, DB800ZLcompliant,

clock buffer capable of distributing the

reference clock for PCIe Gen 1-6, QuickPath

Interconnect (QPI), UPI, SAS, and SATA interfaces.

The SMBus interface and eight output enable pins

allow the configuration and control of all eight

outputs individually. The CDCDB803 is a DB800ZL

derivative buffer and meets or exceeds the system

parameters in the DB800ZL specification. It also

meets or exceeds the parameters in the DB2000Q

specification. The CDCDB803 is packaged in a 6-mm

× 6-mm, 48-pin VQFN package.