IDT2305A-1HDC8

Clock Generators, PLLs, Frequency Synthesizers Overview

The IDT2305A-1HDC8 is a 3.3V zero delay clock buffer featuring an on-chip phase-lock loop (PLL). It accepts one reference input and distributes it to five low-skew outputs, operating within a frequency range of 10 MHz to 133 MHz. The -1H designation indicates high drive capability with faster rise and fall times compared to the standard drive version. The device achieves zero input-output delay by aligning the output phase with the incoming clock. It operates at 3.3V VDD and includes a power-down mode that draws less than 25µA in industrial temperature ranges.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Zero Input-Output Delay via internal PLL feedback
• High Drive Output Capability (-1H variant)
• Output Skew < 250 ps
• Low Jitter < 200 ps cycle-to-cycle

Clock Generators, PLLs, Frequency Synthesizers Applications

• SDRAM Clock Distribution
• Telecom Systems
• Datacom Applications
• PC Motherboards and Workstations
• Critical Path Delay Designs

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

Verify the package type matches the required SOIC footprint. Confirm the temperature grade corresponds to the specific application environment, as the suffix 'I' denotes Industrial range (-40°C to +85°C) while non-suffixed or 'G' variants may differ. Ensure the ordering code accurately reflects the high-drive requirement indicated by the '-1H' prefix.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select the -1H variant for applications requiring higher drive strength and faster transition times up to 133 MHz. For designs utilizing zero I/O delay, ensure all outputs including CLKOUT are equally loaded to maintain phase alignment. Verify load capacitance requirements, which are limited to 10 pF for frequencies between 100 MHz and 133 MHz.

Clock Generators, PLLs, Frequency Synthesizers Part Context

The IDT2305A is an 8-pin version of the IDT2309A. It functions as a high-speed PLL clock buffer designed for distributing a single reference clock to multiple destinations with minimal skew. The device integrates the PLL feedback path internally via the CLKOUT pin, eliminating the need for external RC networks.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Public confirmed substitute part numbers only; omit otherwise.