CDC111FN

Overview

The CDC111FN is a single-circuit fanout buffer manufactured by Texas Instruments, designed for clock distribution applications. It accepts an LVPECL input and provides nine LVPECL outputs with a 1:9 ratio. The device supports maximum frequencies of 500 MHz and operates on a supply voltage range of 3V to 3.6V. It is housed in a 28-PLCC (J-Lead) surface-mount package measuring 11.51x11.51 mm. The component functions within an operating temperature range of 0°C to 70°C.

Feature Summary

• Single circuit fanout buffer with 1:9 input-to-output ratio
• LVPECL differential input and output signaling
• Maximum operating frequency of 500 MHz
• Supply voltage range of 3V to 3.6V

Applications

• Clock distribution networks requiring signal buffering
• High-speed digital systems utilizing LVPECL interfaces
• Board-level timing distribution for multiple loads

Procurement Notes

Verify the specific manufacturer lot code and date code upon receipt to ensure component authenticity. Confirm that the physical package matches the 28-LCC J-Lead specification. Check for any visible damage to the leads or casing before installation. Ensure storage conditions comply with moisture sensitivity levels if applicable. Review the official datasheet for handling precautions related to electrostatic discharge.

Selection Notes

Select this component when a single LVPECL source must drive up to nine LVPECL destinations. Ensure the system power supply remains stable between 3V and 3.6V. Verify that the PCB layout accommodates the 28-PLCC footprint dimensions of 11.51x11.51 mm. Confirm that the ambient operating environment stays within the 0°C to 70°C range. Consider thermal dissipation requirements based on the load capacitance connected to each output.

Part Context

This part belongs to the CDC111 family of clock buffers from Texas Instruments. It serves as a specialized solution for distributing high-frequency clock signals in electronic designs. The device is distinct from general-purpose logic buffers due to its specific LVPECL compatibility and fixed 1:9 gain structure.

Replacement Considerations

Check for direct pin-compatible alternatives within the same family. Verify that substitute parts support identical LVPECL specifications and voltage ranges. Ensure replacement packages match the 28-PLCC form factor.