CDC339DBG4

Overview

The Texas Instruments CDC339DBG4 is a single-circuit fanout buffer 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 operating frequencies of 80 MHz and functions within a supply voltage range of 4.75V to 5.25V. It is housed in a 20-SSOP package (0.209 inch width) suitable for surface mount installation. The component operates reliably across an extended temperature range from -40°C to +85°C.

Feature Summary

• Single circuit configuration providing one-to-eight fanout distribution
• TTL compatible input and output logic levels
• Maximum frequency capability of 80 MHz
• Operates on a standard 5V supply rail (4.75V to 5.25V)

Applications

• Clock signal distribution in digital systems
• Buffering timing signals for multiple loads
• Industrial control equipment requiring TTL interfaces

Procurement Notes

Verify the specific ordering suffix 'G4' against current manufacturer documentation to confirm compliance status and availability, as suffixes can indicate RoHS compliance or lifecycle changes. Confirm that the tube packaging matches the required manufacturing process. Cross-reference the exact part number with official distributors to ensure authenticity and check for active production status versus obsolescence notices.

Selection Notes

Select this component when a single-ended TTL source must drive up to eight TTL destinations without differential signaling requirements. Ensure the system power supply remains stable between 4.75V and 5.25V. Verify that the 20-SSOP footprint fits the PCB layout constraints. Consider the 80 MHz limit if higher speed buffering is needed.

Part Context

This part belongs to the CDC339 family of clock buffers manufactured by Texas Instruments. The base model CDC339 defines the core electrical specifications, while the DBG4 suffix indicates the specific tape-and-reel or tube packaging variant and environmental compliance attributes associated with this specific orderable unit.

Replacement Considerations

Public records indicate the parameter-equivalent replacement CDC339DB may be available. Verify pin compatibility and electrical equivalence before substitution.