CDC391D

Overview

The CDC391D is a single-circuit fanout buffer manufactured by Texas Instruments, designed for clock distribution applications. It features a 1:6 input-to-output ratio, converting a single TTL-compatible input signal into six synchronized TTL outputs. The device supports a maximum operating frequency of 100 MHz and functions within a supply voltage range of 4.75 V to 5.25 V. It is housed in a 16-SOIC surface-mount package with a width of 3.90 mm. The component operates reliably across an industrial temperature range from -40°C to +85°C.

Feature Summary

• Single circuit providing 1:6 fanout buffering capability
• TTL-compatible input and output logic levels
• Maximum operating frequency of 100 MHz
• Operates on a standard 5 V supply (4.75 V to 5.25 V)

Applications

• Clock distribution networks requiring signal splitting
• Digital systems utilizing TTL logic families
• High-speed data acquisition timing circuits

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and tape/reel specifications. Ensure the required quantity matches the available bulk or tube packaging options provided by authorized distributors. Confirm RoHS compliance status if environmental regulations apply to the target assembly process.

Selection Notes

Select this component when a single clock source must drive up to six downstream TTL loads. The 100 MHz frequency limit defines the maximum speed capability. Verify that the system power supply remains stable between 4.75 V and 5.25 V to ensure correct logic threshold operation. The 16-SOIC package requires appropriate PCB footprint design for surface mount assembly.

Part Context

This part belongs to the Texas Instruments clock buffer and driver category. It serves as a signal integrity solution for expanding clock signals in digital circuits. The 16-SOIC package provides a compact form factor suitable for dense board layouts compared to through-hole alternatives.

Replacement Considerations

Check for direct pin-compatible replacements within the same family that may offer updated packaging or enhanced electrical characteristics. Verify that any substitute maintains the 1:6 ratio and TTL compatibility.