CDC421312RGER

Clock Generators, PLLs, Frequency Synthesizers Overview

The CDC421312RGER is a fully integrated fixed-frequency low-jitter clock generator manufactured by Texas Instruments. It operates on a single 3.3 V supply and features an integrated LC-based voltage-controlled oscillator (VCO) running between 1.75 GHz and 2.35 GHz. The device generates a 312.5 MHz LVPECL output from a 31.25 MHz crystal or LVCMOS input. It provides low phase noise, typically less than -120 dBc/Hz at a 10 kHz offset, with RMS jitter as low as 380 fs when integrated between 10 kHz and 20 MHz. The component is housed in a QFN-24 package and supports industrial operating temperatures ranging from -40 °C to +85 °C.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Fully integrated frequency synthesizer incorporating a high-performance LC-based VCO for stable operation without external tuning components.
• Low-output jitter performance achieved through advanced PLL architecture, supporting precise timing requirements for high-speed digital systems.
• Flexible input configuration allowing connection to either an external AT-cut crystal or a single-ended LVCMOS signal source.

Clock Generators, PLLs, Frequency Synthesizers Applications

• High-performance clock generation for data converters and ADCs
• Timing reference distribution for communication equipment
• Clock synthesis for embedded processing systems

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to ensure correct packaging format. Confirm that the required input frequency matches the fixed internal divider settings for the 312.5 MHz output. Check for updated moisture sensitivity levels and recommended reflow profiles prior to assembly.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this model specifically when a fixed 312.5 MHz LVPECL output is required from a 31.25 MHz reference. Ensure the design accommodates the QFN-24 thermal pad requirements for adequate heat dissipation. Verify that the system power budget aligns with the typical 300 mW consumption at maximum output frequency.

Clock Generators, PLLs, Frequency Synthesizers Part Context

This component belongs to the CDC421xxx family of low-jitter clock generators. Other members in this series provide different fixed output frequencies such as 100 MHz, 125 MHz, and 212.5 MHz while sharing the same QFN-24 package and core architecture. The RGE suffix indicates tape and reel packaging suitable for automated surface-mount assembly.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct functional substitutes within the same family include CDC421100RGER, CDC421125RGER, and CDC421212RGER, provided the specific output frequency requirement can be adjusted to match those models. Pinout compatibility remains consistent across the series.