Original Part
SRAM - Asynchronous Memory IC 4Mbit Parallel 10 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
The IS62WV25616BLL-55BLI is functionally and parametrically compatible with the original part, but significant performance differences limit its suitability to low-speed applications only. Direct substitution requires careful evaluation. Key variances include: First, the access time/write cycle time is substantially degraded from 10 ns to 55 ns, resulting in memory operations approximately five times slower. This may cause system timing violations in high-speed processing environments. Second, the operating voltage range is widened from 3V–3.6V to 2.5V–3.6V, improving compatibility; however, if the system operates below 3V, stability must be re-verified. Third, the package footprint differs (original: 48-CABGA 9x9; substitute: 48-TFBGA 6x8), necessitating PCB layout redesign and potential adjustments to assembly processes. In summary, substitution is only advisable when the system has ample timing margin and can accommodate the changed package.
2. IS62WV25616BLL-55BLI-TR Substitution Conclusion
The substitution feasibility for the IS62WV25616BLL-55BLI-TR is identical to that of the non-TR version described above. The “-TR” suffix denotes Tape and Reel packaging for automated assembly and does not affect electrical characteristics. Therefore, the same conclusion applies: given the core differences in speed (55 ns vs. 10 ns) and package size (6x8 vs. 9x9), substitution is only suitable for low-speed systems and requires PCB layout redesign. Although the extended voltage range (2.5V–3.6V) improves compatibility, it does not offset the speed disadvantage. If tape-and-reel packaging is required for production, this part can directly replace the non-TR version, provided system timing and physical layout compatibility are thoroughly assessed.
Analysis ID: 2A0C-5408000
Based on part parameters and for reference only. Not to be used for procurement or production.
SkyChip © 2026, Email: sales@skychip.com