23S08-3DCGI

Overview

The Renesas Electronics Corporation 23S08-3DCGI is a discontinued 3.3V Zero Delay Clock Multiplier belonging to the 23S08 family. It functions as a phase-lock loop (PLL) clock multiplier designed for high-speed clock distribution and multiplication applications within the 10MHz to 133MHz operating frequency range. The device achieves zero delay by aligning the phase between the incoming clock and the output clock. It features one LVCMOS input and eight LVCMOS outputs organized into two banks of four, with separate output enable controls for each bank. The component supports spread spectrum input compatibility and offers specific multiplication ratios.

Feature Summary

• Zero Delay Buffer architecture synchronizing output phases to the input clock via external feedback
• Supports 2x and 4x multiplication ratios for input frequencies up to 133MHz
• Accepts Spread Spectrum Input signals for EMI reduction
• Low cycle-to-cycle jitter performance with a maximum peak-to-peak value of 200ps

Applications

• High-speed clock distribution systems requiring precise phase alignment
• Multiplication of reference clocks in digital logic circuits
• Systems utilizing spread spectrum clocking techniques for electromagnetic interference mitigation

Procurement Notes

The 23S08-3DCGI is officially listed as obsolete or discontinued by the manufacturer. Verification of availability should focus on surplus distributors or secondary market sources rather than standard supply channels. Buyers must confirm the specific revision level and package integrity, as lead-free status and moisture sensitivity levels may vary across remaining stock batches. Component authenticity testing is recommended due to the end-of-life status.

Selection Notes

Designers selecting this component must account for its 3.3V core voltage requirement and LVCMOS I/O standards. The device requires an external feedback connection to close the PLL loop, which determines the zero-delay characteristic. Selection should verify that the required multiplication factor matches the -3 suffix configuration (2x/4x). Alternative packages such as SOIC or TSSOP variants within the same family may be considered if pinout compatibility allows, though the specific DCGI suffix denotes a particular package type.

Part Context

This part belongs to the IDT/Renesas 23S08 series of zero-delay clock multipliers. The series includes variants with different multiplication factors (1x, 2x, 4x) and drive strengths. The 23S08-3DCGI specifically provides 2x and 4x options. It shares architectural similarities with the 2308B series but includes enhanced features like spread spectrum input acceptance. The component was widely used before being superseded by newer FemtoClock families.

Replacement Considerations

Direct replacements are limited due to the obsolete status. Potential substitutes include other 23S08 family members with matching multiplication ratios (e.g., 23S08-2xxx) or updated Renesas FemtoClock series devices such as the RC223xxA for lower jitter requirements. Cross-reference with IDT2308-3 variants may be necessary, ensuring voltage and package compatibility.