CDCF2509PW

Application Specific Clock/Timing Overview

The CDCF2509PW is a clock buffer and driver integrated circuit manufactured by Texas Instruments, designed primarily for memory applications such as DRAM DIMMs. It features an internal Phase-Locked Loop (PLL) to generate multiple output clocks from a single input. The device operates within a supply voltage range of 3V to 3.6V and supports maximum frequencies up to 140MHz. It provides a 1:9 input-to-output ratio with a single circuit configuration. The component is housed in a 24-TSSOP package with a width of 4.40mm and is rated for operation between 0°C and 85°C.

Application Specific Clock/Timing Feature Summary

• Integrated PLL-based clock distribution with 1:9 input-to-output ratio
• Maximum operating frequency of 140MHz for high-speed memory systems
• Single-supply operation ranging from 3V to 3.6V
• Available in a 24-TSSOP surface-mount package

Application Specific Clock/Timing Applications

• DRAM DIMM clock buffering and distribution
• High-speed memory interface timing circuits
• System clock generation for digital logic

Application Specific Clock/Timing Procurement Notes

The CDCF2509PW is officially listed as a discontinued product by the manufacturer. Verification of availability should focus on authorized distributors or secondary market suppliers who may hold existing stock. Buyers must confirm the specific revision level and ensure compliance with RoHS3 standards, as indicated in public records. Due to its end-of-life status, lead times and minimum order quantities are subject to the discretion of third-party sellers rather than standard manufacturing schedules.

Application Specific Clock/Timing Selection Notes

Designers requiring this component should verify that the 140MHz frequency limit and 1:9 fan-out capability meet system requirements. The 3V to 3.6V supply constraint necessitates appropriate power rail planning. Since the part is discontinued, alternative solutions with similar PLL architectures and pin-compatible packages should be evaluated for long-term production viability. Ensure the 24-TSSOP footprint matches the PCB layout constraints.

Application Specific Clock/Timing Part Context

This component belongs to the CDCF2509 family of clock drivers. It shares functional similarities with other Texas Instruments PLL-based clock buffers but is distinct in its specific 1:9 ratio and memory-focused optimization. The 'P' suffix denotes the TSSOP package type, distinguishing it from other form factors within the same electrical specification family.

Application Specific Clock/Timing Replacement Considerations

Public records indicate the CDC2509CPWR as a related variant within the same family. Engineers should consult official datasheets to compare pinouts, electrical characteristics, and package dimensions before substituting.