CDC351DBR

Overview

The CDC351DBR is a single-circuit fanout buffer manufactured by Texas Instruments, designed for clock distribution applications. It provides a 1:10 input-to-output ratio with LVTTL-compatible inputs and tri-state LVTTL outputs. The device supports maximum frequencies of 100 MHz and operates on a supply voltage range of 3V to 3.6V. Packaged in a 24-SSOP (5.30mm width) case, it is available in tape and reel or cut tape formats. The component functions without differential signaling capabilities and is rated for commercial operating temperatures between 0°C and 70°C.

Feature Summary

• Single circuit providing 1:10 fanout distribution
• LVTTL input with tri-state LVTTL outputs
• Maximum operating frequency of 100 MHz
• Supply voltage range of 3V to 3.6V

Applications

• Clock distribution networks
• System timing synchronization
• Digital signal processing interfaces

Procurement Notes

Verify the package type matches the design requirements, as the DBR suffix indicates a 24-SSOP form factor rather than the SOIC variant. Confirm that the commercial temperature grade (0°C to 70°C) meets the operational environment specifications. Ensure power supply rails remain within the 3V to 3.6V range to maintain signal integrity and proper logic threshold levels during operation.

Selection Notes

Select this component when a low-cost, single-ended LVTTL clock driver is required for moderate-speed digital systems. The 100 MHz limit suits standard microprocessor and memory bus clocks. Consider the 24-SSOP package constraints regarding PCB space and thermal dissipation. Verify that the tri-state functionality aligns with system bus control requirements for multiple clock domains.

Part Context

This part belongs to the broader family of clock buffer and driver integrated circuits from Texas Instruments. It serves as a specific solution for distributing a single clock source to ten downstream loads. The device complements other timing components like oscillators and PLLs by providing signal regeneration and load isolation within digital electronic architectures.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation.