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. Substitution Conclusion for IS62WV25616BLL-55BLI
This device is functionally equivalent to the original part in its core specifications (4Mbit density, 256K x 16 organization, parallel interface) and wide operating voltage range (compatible with the original 3.3V supply), making it a viable functional substitute. The key differences lie in its significantly slower access time (55ns vs. 12ns), which may introduce performance degradation due to inserted wait states in high-speed applications and could potentially cause timing violations. Furthermore, its package (48-TFBGA) may differ from the original 48-CABGA in ball pitch and physical dimensions. This discrepancy could necessitate PCB modifications, preventing a direct drop-in replacement from a footprint perspective.
2. Substitution Conclusion for IS62WV25616BLL-55BLI-TR
This part is identical to the IS62WV25616BLL-55BLI in all electrical parameters and package specifications. The "-TR" suffix denotes only the tape and reel packaging format. Consequently, the substitution conclusion is identical. It can serve as a functional alternative but carries the same risks: significant performance degradation due to the speed downgrade (55ns vs. 12ns) and potential physical footprint incompatibility. Rigorous timing analysis and a thorough review of the PCB land pattern are essential before substitution.
Analysis ID: EB48-1317000
Based on part parameters and for reference only. Not to be used for procurement or production.
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