IDT2308B-4DC8

Clock Generators, PLLs, Frequency Synthesizers Overview

The IDT2308B-4DC8 is a 3.3V Zero Delay Clock Multiplier manufactured by Renesas Electronics, part of the 2308B series. It functions as a high-speed phase-lock loop (PLL) clock distribution device designed for applications operating between 10 MHz and 133 MHz. The component features eight outputs organized into two banks of four, with separate enable controls for each bank. Key electrical specifications include an output skew of less than 200 ps and cycle-to-cycle jitter under 200 ps. It operates on a single 3.3V supply voltage and is housed in a 16-pin SOIC package.

Clock Generators, PLLs, Frequency Synthesizers Feature Summary

• Zero delay buffer architecture aligns input and output phases using external PLL feedback
• Eight LVCMOS outputs distributed across two independently controllable banks
• Low jitter performance with cycle-to-cycle jitter less than 200 ps
• Output skew specification maintained below 200 ps

Clock Generators, PLLs, Frequency Synthesizers Applications

• High-speed clock distribution in communication systems
• Clock multiplication and prescaling for digital logic interfaces
• System synchronization requiring low skew output alignment

Clock Generators, PLLs, Frequency Synthesizers Procurement Notes

This component is classified as obsolete or end-of-life. Verification of current availability requires checking authorized distributors for remaining stock or surplus inventory. Sourcing may involve limited quantities from secondary markets. Compliance with RoHS standards should be confirmed via specific datasheet revisions, as legacy parts often have mixed compliance statuses depending on manufacturing date.

Clock Generators, PLLs, Frequency Synthesizers Selection Notes

Select this part when a fixed 1x multiplication ratio is required within the 10-133 MHz range. The -4 suffix indicates a specific frequency multiplication configuration; verify against the official pinout table to ensure it matches the system's clock requirements. Ensure the design accommodates the external feedback loop components necessary for PLL operation. Consider the 16-SOIC package dimensions for PCB layout constraints.

Clock Generators, PLLs, Frequency Synthesizers Part Context

The IDT2308B-4DC8 belongs to the broader 2308 family of zero-delay buffers. This family includes variants with different multiplication ratios (1x, 2x, 4x) and drive strengths. The 'B' designation typically refers to a specific generation or revision of the original IDT2308 product line, offering similar functionality with potential updates in packaging or process technology compared to earlier iterations.

Clock Generators, PLLs, Frequency Synthesizers Replacement Considerations

Direct replacements are difficult due to the obsolete status. Potential alternatives include other Renesas/Sitime zero-delay buffers like the 91309 series or generic LVCMOS clock drivers. Verify that any substitute supports the same 3.3V supply, 133 MHz maximum frequency, and 16-pin SOIC footprint.