Original Part
SRAM - Asynchronous Memory IC 4Mbit Parallel 10 ns 48-CABGA (9x9)
Alternative Part
SRAM - Asynchronous Memory IC 4Mbit Parallel 10 ns 48-TFBGA (6x8)
SRAM - Asynchronous Memory IC 4Mbit Parallel 10 ns 48-TFBGA (6x8)
1. IS61WV25616BLL-10BLI Substitution Conclusion
From a core functional parameter standpoint, the IS61WV25616BLL-10BLI can serve as a substitute for the original part. Both are 4Mbit (256Kx16) asynchronous SRAMs with a 10ns access time, featuring identical memory organization and interface. The differences lie in two areas. First, the power supply voltage range: the ISSI part specifies 2.4V to 3.6V, which is wider than the original part's 3.0V to 3.6V. This offers superior power supply compatibility, as it not only remains compatible with the original 3.3V application but also enables use in lower-voltage systems. Second, the package details: while both have the same pin count and are BGA packages, the original part uses a 48-CABGA (9x9 mm) footprint, whereas the ISSI part uses a 48-TFBGA (6x8 mm). Their physical dimensions and ball layouts are highly likely incompatible, necessitating a PCB redesign for direct substitution. Therefore, while the parts are electrically and functionally interchangeable, they are physically incompatible. A direct pad-for-pad replacement is not feasible, and a board modification is required.
2. IS61WV25616BLL-10BLI-TR Substitution Conclusion
The substitution conclusion for the IS61WV25616BLL-10BLI-TR is identical to that for the IS61WV25616BLL-10BLI described above. The "-TR" suffix typically denotes Tape and Reel packaging, which is suited for automated surface-mount assembly, whereas the base part number may be supplied in Tray packaging. There may also be differences in minimum order quantities. Crucially, there is no distinction in electrical characteristics, parametric specifications, or physical package between the "-TR" and non-"-TR" versions. Consequently, the substitution conclusion remains the same: a complete match in core functionality and performance with superior voltage compatibility, but similarly constrained by the physical incompatibility of the packages (48-TFBGA vs. 48-CABGA), preventing a direct drop-in replacement and requiring a board change. Selecting the "-TR" version primarily affects procurement and the convenience of production line assembly.
Analysis ID: 47AE-1EC6000
Based on part parameters and for reference only. Not to be used for procurement or production.
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