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. IS62WV25616BLL-55BLI Substitution Conclusion
Direct substitution is not recommended. The key differences lie in access speed (55 ns vs. 12 ns) and package compatibility (48-TFBGA vs. 48-CABGA). The significantly slower access speed of this chip fails to meet the original design's memory timing requirements, which could lead to data read/write errors or system crashes in high-speed applications. Furthermore, although both are 48-ball BGAs, differences in ball layout, dimensions, or pitch between TFBGA and CABGA packages pose risks for soldering and physical connectivity if directly swapped. Substitution could only be cautiously considered in specific low-speed, wide-voltage applications where speed is non-critical and package compatibility has been thoroughly verified.
2. IS62WV25616BLL-55BLI-TR Substitution Conclusion
The conclusion is identical to that for the IS62WV25616BLL-55BLI: direct substitution is not recommended. The "-TR" suffix denotes Tape and Reel packaging, indicating a difference only in supply packaging format. The electrical characteristics, package, and technical parameters of the chip itself are identical to the IS62WV25616BLL-55BLI without the "-TR" suffix. It shares the same fundamental discrepancies with the original part in critical access speed (55 ns) and package type (48-TFBGA). Therefore, its substitution feasibility depends on the same technical prerequisites outlined above and is unsuitable for the original high-speed design.
Analysis ID: 4F12-02CF000
Based on part parameters and for reference only. Not to be used for procurement or production.
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