CDCUA877ZQLT

Application Specific Clock/Timing Overview

The CDCUA877ZQLT is a Phase-Locked Loop (PLL) clock driver manufactured by Texas Instruments, designed for DDR2 memory interface applications. It operates within a supply voltage range of 1.7 V to 1.9 V and supports a maximum output frequency of 410 MHz. The device features a 1:10 input-to-output ratio with differential SSTL-18 inputs and outputs. It is housed in a 52-BGA MicroStar Junior package measuring 7x4.5 mm. The component functions as a zero-delay buffer with low jitter and low offset characteristics, suitable for high-speed digital systems.

Application Specific Clock/Timing Feature Summary

• Integrated PLL architecture providing low-jitter clock distribution
• Supports DDR2 memory interfaces with SSTL-18 I/O standards
• 1:10 clock division ratio with differential signal compatibility

Application Specific Clock/Timing Applications

• DDR2 memory controller clock generation
• High-speed data acquisition systems
• Telecommunications equipment requiring precise timing

Application Specific Clock/Timing Procurement Notes

This component has reached End-of-Life (EOL) status and is no longer manufactured by Texas Instruments. Verification of availability should focus on obsolete stock or authorized distributors holding remaining inventory. Replacement strategies must account for the discontinuation notice dated November 20, 2020. Designers should initiate migration plans immediately due to limited long-term supply.

Application Specific Clock/Timing Selection Notes

Selection requires confirmation of 1.7 V to 1.9 V power supply constraints and SSTL-18 signaling compatibility. The 52-VFBGA package necessitates specific PCB layout guidelines for thermal management and signal integrity. Engineers must verify that the 410 MHz maximum frequency meets system requirements. Since the part is discontinued, alternative components from the same family or newer generations should be evaluated for pin-to-pin or functional compatibility.

Application Specific Clock/Timing Part Context

The CDCUA877ZQLT belongs to the CDCUx877x PLL family, which includes similar clock drivers optimized for memory interfaces. This series is characterized by its ability to clean and distribute clocks with minimal skew. The ZQLT suffix denotes the specific tape-and-reel packaging variant within the broader CDCUA877 product line.

Application Specific Clock/Timing Replacement Considerations

The CDCUA877NMKT is listed as a potential substitute part number. However, verification of electrical parameters and pinout compatibility is required before implementation.