CDCU877ARTBT

Application Specific Clock/Timing Overview

The CDCU877ARTBT is a low-jitter, zero-delay buffer clock driver manufactured by Texas Instruments. It distributes one differential clock input to ten differential outputs and includes feedback outputs for phase-locked loop synchronization. Designed for DDR2 memory applications, it operates at frequencies up to 400 MHz with a supply voltage of 1.8 V (range 1.7 V to 1.9 V). The device features cycle-to-cycle jitter as low as ±30 ps and supports spread spectrum clocking. It is housed in a 40-pin MLF package.

Application Specific Clock/Timing Feature Summary

• Distributes one differential clock input to ten differential outputs
• Integrated PLL with low jitter: ±30 ps cycle-to-cycle, ±20 ps period jitter
• Supports Spread Spectrum Clocking (SSC) for EMI reduction
• Low power consumption: <135 mA dynamic current

Application Specific Clock/Timing Applications

• DDR2 memory systems
• High-speed digital circuits requiring precise clock distribution
• Systems utilizing Spread Spectrum Clocking

Application Specific Clock/Timing Procurement Notes

Verify the specific ordering suffix 'RTB' corresponds to the 40-pin MLF package configuration. Confirm that the component meets RoHS compliance standards required for your assembly process. Ensure the source provides valid traceability documentation for this Texas Instruments part number.

Application Specific Clock/Timing Selection Notes

Select this component when a single differential clock source must drive ten loads with minimal skew. Verify that the application frequency falls within the 160 MHz to 340 MHz range for optimal timing parameter compliance. Ensure the PCB layout accommodates the 40-pin MLF footprint and provides adequate filtering for the AVDD pin.

Application Specific Clock/Timing Part Context

This part belongs to the CDCU877 family of clock drivers. The 'A' designation typically indicates an enhanced version or revision within the series. The 'RTB' suffix specifically identifies the 40-pin Quad Flatpack No-Lead (MLF) package variant, distinct from the BGA options available in the same family.

Application Specific Clock/Timing Replacement Considerations

Check for CDCU877AZQL or CDCU877GQL if a different package is acceptable. Verify compatibility with CDCU877ARTBR if a BGA package is preferred instead of the MLF form factor.