Original Part
Zero Delay Buffer IC 133MHz 1 8-SOIC (0.154", 3.90mm Width)
Alternative Part
1. CDCVF2505DG4 Substitution Conclusion
This device is fully compatible with the original part in terms of core functionality (1:5 PLL buffer/driver), package (8-SOIC), supply voltage (3.3V), and input logic (LVTTL). It offers a superior maximum operating frequency of 200MHz. The key difference lies in its output logic, which is limited to LVTTL, whereas the original part supported CMOS, LVCMOS, and TTL outputs. When considering substitution, it is critical to verify that all downstream devices (e.g., FPGAs, ASICs, memory) driven by this component on the target board have clock input ports compatible with or specifically requiring LVTTL levels. If the original design relies on the voltage swing or threshold levels of CMOS or TTL, a direct replacement may reduce timing margins or cause interface failure. Circuit-level validation is therefore essential.
2. CDCVF2505DRG4 Substitution Conclusion
This part is electrically, functionally, and mechanically identical to the aforementioned CDCVF2505DG4 (the suffix "R" typically denotes reel packaging differences and does not affect performance). Consequently, the substitution conclusion is the same. It also offers direct compatibility with the original design's core architecture and power supply at a higher frequency. However, the same critical limitation applies: its output logic is exclusively LVTTL. This constitutes the primary constraint for substitution feasibility. Prior to replacement, the dependency of the system clock network on the output logic type must be assessed. If all downstream loads are LVTTL-compatible, it can be considered a high-performance alternative. Otherwise, interface redesign or selection of a part with matching output types is required.
Analysis ID: CADD-59D7000
Based on part parameters and for reference only. Not to be used for procurement or production.
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