CDC339DW

Overview

The CDC339DW is a single-circuit fanout buffer manufactured by Texas Instruments, designed for clock distribution applications. It accepts a TTL input signal and provides eight TTL outputs with a 1:8 ratio. The device supports maximum frequencies up to 80 MHz and operates on a supply voltage range of 4.75V to 5.25V. It is housed in a 20-SOIC package (0.295 inch width) suitable for surface mount installation. The component functions within an operating temperature range of -40°C to +85°C.

Feature Summary

• Single circuit configuration providing one-to-eight fanout buffering
• TTL input and output logic levels
• Maximum operating frequency of 80 MHz
• Surface mount 20-SOIC package

Applications

• Clock distribution networks
• Fanout buffering for digital systems
• Signal distribution in timing circuits

Procurement Notes

Verify the specific package variant, as the 'DW' suffix denotes a tube/bulk packaging format distinct from tape-and-reel options like 'DWR'. Confirm end-of-life status or availability through authorized distributors, as this part may be discontinued or subject to long-lead times depending on current inventory levels.

Selection Notes

Select this component when a single TTL-driven source requires distribution to eight TTL loads. Ensure the system power supply remains within the 4.75V to 5.25V range. Verify that the 80 MHz frequency limit meets the application's timing requirements and that the 20-SOIC footprint fits the PCB layout constraints.

Part Context

This part belongs to the CDC339 family of clock buffers. It shares functional specifications with variants such as CDC339DWR and CDC339DBR, differing primarily in packaging type. The base model number CDC339 defines the electrical characteristics, while the suffix indicates the physical package and shipping method.

Replacement Considerations

CDC339DWR serves as a parameter-equivalent alternative with identical electrical specifications but utilizes tape-and-reel packaging instead of tubes.