Original Part
SRAM - Asynchronous Memory IC 4Mbit Parallel 15 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 part is not a direct drop-in replacement for the original component. While core specifications—such as the 4Mbit density (organized as 256K x 16), parallel interface, and wide operating voltage range (2.5V to 3.6V)—are compatible, two critical discrepancies preclude a direct substitution. First, its access/cycle time of 55ns is significantly slower than the original part's 15ns. In systems with stringent timing requirements, this slower speed may lead to performance shortfalls or timing violations. Second, the physical package is a 48-TFBGA (6x8), which differs entirely from the original 48-CABGA (9x9) in both outline dimensions and ball pad layout. Consequently, it cannot be mounted on the same PCB footprint, necessitating a board redesign.
2. Substitution Conclusion for IS62WV25616BLL-55BLI-TR
This part is also not a direct drop-in replacement for the original component. The IS62WV25616BLL-55BLI-TR is electrically and mechanically identical to the IS62WV25616BLL-55BLI; the "-TR" suffix typically denotes only the tape-and-reel packaging format. Therefore, it shares the same technical disqualifiers as the non-TR version: the 55ns access time is mismatched for high-speed applications, and the 48-TFBGA (6x8) package is physically incompatible with the original 48-CABGA (9x9) footprint. These factors definitively rule out its use as a replacement without corresponding design modifications.
Analysis ID: 3481-9A7B000
Based on part parameters and for reference only. Not to be used for procurement or production.
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