CDCF2510PW

Application Specific Clock/Timing Overview

The CDCF2510PW is a 3.3-V phase-lock loop (PLL) clock driver designed for synchronous DRAM applications, specifically meeting PC133 SDRAM registered DIMM specifications. It distributes one clock input to ten outputs with low skew and low jitter characteristics. The device operates within a frequency range of 25 MHz to 140 MHz and includes integrated series damping resistors to eliminate the need for external RC networks. It features an output enable pin to control all ten outputs simultaneously.

Application Specific Clock/Timing Feature Summary

• Integrates a PLL to synchronize feedback output with the clock input, ensuring precise frequency and phase alignment.
• Provides ten low-skew, low-jitter outputs with integrated 25-Ω series damping resistors for point-to-point loads.
• Includes an internal loop filter, removing the requirement for external RC components.
• Features a dedicated output enable (G) input to disable all outputs to a logic-low state.

Application Specific Clock/Timing Applications

• Synchronous DRAM clock distribution
• PC133 SDRAM registered DIMMs

Application Specific Clock/Timing Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and check for lifetime-buy availability as the device may be discontinued. Ensure proper handling procedures are followed due to moisture sensitivity classification.

Application Specific Clock/Timing Selection Notes

Select this component when designing systems requiring low-jitter clock distribution for synchronous memory interfaces. Ensure the operating temperature range of 0°C to 85°C meets environmental requirements. Verify that the 3.3-V supply voltage aligns with system power rails and that the TSSOP-24 package fits the PCB layout constraints.

Application Specific Clock/Timing Part Context

This device belongs to the CDCF2510 family of clock drivers from Texas Instruments. It is part of a series designed for high-speed memory applications, offering specific performance metrics for jitter and skew compared to other members in the broader clock distribution product line.

Application Specific Clock/Timing Replacement Considerations

The CDCVF2510A is documented as a replacement for this device. Verify functional compatibility and pinout correspondence before substitution.

Application Specific Clock/Timing FAQ

How is the PLL stabilized?

The PLL requires a stabilization time of up to 1 ms after power-up or changes to reference signals to achieve phase lock between the feedback signal and the reference signal.

What is the function of the AVCC pin?

AVCC provides the analog power supply reference. Strapping AVCC to ground bypasses the PLL, allowing the CLK input to be buffered directly to the outputs for test purposes.

How are the outputs controlled?

All ten outputs are enabled or disabled via the G input. When G is high, outputs switch in phase with CLK; when G is low, outputs are disabled to a logic-low state.