Original Part
SRAM - Asynchronous Memory IC 4Mbit Parallel 12 ns 48-CABGA (9x9)
Alternative Part
SRAM - Asynchronous Memory IC 4Mbit Parallel 55 ns 48-TFBGA (6x8)
SRAM - Asynchronous Memory IC 4Mbit Parallel 55 ns 48-TFBGA (6x8)
1. IS62WV25616BLL-55BLI Substitution Conclusion
Direct substitution is not viable and requires careful evaluation. While this part matches the original in core functionality (4Mbit, 256Kx16, parallel interface), two critical discrepancies exist. First, its speed performance is significantly degraded, with an access time of 55ns compared to the original's 12ns. If the original system has stringent timing requirements for memory access, a direct swap would degrade system performance or cause timing violations. Second, the physical packages are incompatible. It uses a 48-TFBGA (6x8mm) package, whereas the original is a 48-CABGA (9x9mm). The differing BGA ballmaps and footprints prevent direct soldering onto the same PCB pads. Substitution should only be considered for speed-insensitive applications where a board redesign is acceptable.
2. IS62WV25616BLL-55BLI-TR Substitution Conclusion
Direct substitution is not viable and requires careful evaluation. This part is identical to the `IS62WV25616BLL-55BLI` mentioned above; the "-TR" suffix solely denotes a Tape and Reel packaging option. All its electrical parameters and package dimensions are exactly the same. Therefore, the substitution feasibility conclusion remains identical: the speed (55ns vs. 12ns) and package (6x8 TFBGA vs. 9x9 CABGA) differences constitute the primary barriers to substitution. The former may prevent the system from operating stably at full speed, while the latter presents a physical soldering incompatibility. Replacement can only be considered for low-speed applications where board modification is feasible.
Analysis ID: D33A-1377000
Based on part parameters and for reference only. Not to be used for procurement or production.
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