CDCU877BZQLR

Application Specific Clock/Timing Overview

The CDCU877BZQLR is a 1.8-V phase-locked loop (PLL) clock driver designed for DDR2 applications, manufactured by Texas Instruments. It distributes one differential clock input to ten differential outputs and one feedback pair within a 52-ball MicroStar Junior BGA package. The device supports operating frequencies from 10 MHz to 340 MHz with low dynamic phase offset of ±15 ps and static phase offset of ±50 ps. It features spread spectrum clock compatibility, low current consumption under 115 mA, and operates between -40°C and 85°C.

Application Specific Clock/Timing Feature Summary

• Distributes one differential clock input to ten differential outputs and one feedback pair
• Low dynamic phase offset of ±15 ps and static phase offset of ±50 ps
• Supports operating frequencies from 10 MHz to 340 MHz
• Spread spectrum clock compatible for EMI reduction

Application Specific Clock/Timing Applications

• DDR2 memory systems
• Clock distribution networks requiring low jitter
• Systems utilizing spread spectrum clocking

Application Specific Clock/Timing Procurement Notes

Verify the ACTIVE status on official Texas Instruments channels before design implementation. Confirm the 52-ball MicroStar Junior BGA package dimensions and pinout against the latest Package Option Addendum. Ensure AVDD filtering meets recommended specifications using a bead and capacitors as detailed in the datasheet to maintain PLL performance.

Application Specific Clock/Timing Selection Notes

Select this component when a 1.8-V supply is required for DDR2 clock buffering. Ensure the application frequency falls within the 10 MHz to 340 MHz range. Verify that the 52-ball BGA footprint fits the PCB layout constraints. Check if spread spectrum clocking is needed, as the device supports it natively.

Application Specific Clock/Timing Part Context

The CDCU877BZQLR belongs to the CDCU877B family of 1.8-V PLL clock drivers. It shares core functionality with variants like the CDCU877BZQLT but differs in tape and reel packaging quantity (1000 units vs. 250 units). Both are classified as active production data devices intended for new designs.

Application Specific Clock/Timing Replacement Considerations

The CDCU877BZQLT is a direct alternative with identical electrical characteristics and package, differing only in shipping quantity (250 units per reel versus 1000 units).