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 parameters and functionality, the IS61WV25616BLL-10BLI is a viable direct replacement for the original part. The key differences are as follows: First, the access/write time has improved from 12ns to 10ns, making the new device faster. It is fully timing-compatible with the original specification and provides additional margin. Second, the operating voltage range has been widened from 3.0-3.6V to 2.4-3.6V, granting the new device superior power supply compatibility and enhanced stability, particularly in scenarios with voltage fluctuations.
The primary constraint is package compatibility. The original part uses a 48-CABGA (9x9 mm) package, whereas this device is in a 48-TFBGA (6x8 mm) package. It is highly probable that the ball map and overall footprint differ between the two. Consequently, they cannot be soldered onto the same PCB pads. Therefore, a direct physical replacement is not feasible without modifying the PCB design.
2. IS61WV25616BLL-10BLI-TR Substitution Conclusion
The substitution conclusion for the IS61WV25616BLL-10BLI-TR is identical to that of the IS61WV25616BLL-10BLI. The "-TR" suffix typically denotes Tape and Reel packaging, as opposed to the Tray packaging of the former. They represent different shipping package forms of the same silicon die. All technical parameters, package dimensions, and the previously noted technical differences and constraints relative to the original part remain exactly the same.
The conclusion stands: despite electrical and functional compatibility, with some specifications being superior, a direct replacement is not possible without a PCB revision due to the physical footprint and layout mismatch between the packages (48-TFBGA vs. 48-CABGA).
Analysis ID: A015-97CA000
Based on part parameters and for reference only. Not to be used for procurement or production.
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