Original Part
SRAM - Asynchronous Memory IC 4Mbit Parallel 12 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 the perspective of core electrical functionality and performance, the IS61WV25616BLL-10BLI can serve as a substitute for the original part. Its memory density, organization, and interface type are identical. Furthermore, its key timing specifications—specifically a 10ns access/write time, which is superior to the original's 12ns—and its voltage compatibility, operating from 2.4V to 3.6V and fully encompassing the original's 3.0V to 3.6V range, meet or exceed the original requirements. This represents a positive upgrade in terms of speed and power supply adaptability.
The primary constraint is physical package incompatibility. The original part uses a 48-CABGA (9x9mm) package, whereas the substitute is a 48-TFBGA (6x8mm). The package footprint and ball map are almost certainly different, making a direct PCB pad-for-pad replacement impossible. A board layout redesign is mandatory.
Therefore, substitution is viable for new product designs or if a board revision is acceptable. It is not feasible if the goal is to solder the substitute directly onto the existing PCB pads.
2. IS61WV25616BLL-10BLI-TR Substitution Conclusion
The IS61WV25616BLL-10BLI-TR is identical to the IS61WV25616BLL-10BLI in all electrical parameters, performance specifications, and physical package. The "-TR" suffix typically denotes Tape and Reel packaging for automated surface-mount assembly, whereas the former may be supplied in trays or tubes.
The substitution conclusion is therefore identical: electrical performance is fully compatible and superior, but the package footprint (6x8mm TFBGA) is physically incompatible with the original part (9x9mm CABGA), necessitating a PCB redesign. The only distinction between these two as potential substitutes lies in their procurement and production packaging format, which has no bearing on the circuit functionality itself.
Analysis ID: 3604-C59C000
Based on part parameters and for reference only. Not to be used for procurement or production.
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