Original Part
SRAM - Asynchronous Memory IC 4Mbit Parallel 15 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 primary discrepancy lies in the significantly slower access time (55 ns versus 15 ns). In high‑speed systems, if the host controller is designed to operate with 15‑ns timing, the replacement will fail to meet timing requirements, potentially causing data corruption or system failure. Additionally, the package (48‑TFBGA versus 48‑CABGA) differs in ball layout and dimensions, preventing direct mounting on the existing PCB and necessitating a board redesign. Although its operating voltage range (2.5 V–3.6 V) covers that of the original part (3 V–3.6 V), the mismatches in critical performance and physical compatibility make it unsuitable as a direct drop‑in replacement.
2. IS62WV25616BLL-55BLI‑TR Substitution Conclusion
The substitution conclusion for this device is identical to that of the IS62WV25616BLL-55BLI; direct replacement is not feasible. The suffix “‑TR” typically denotes only the tape‑and‑reel packaging format for automated assembly, while the core parameters of the chip—55‑ns access time, 48‑TFBGA package, and 2.5 V–3.6 V voltage range—remain exactly the same as those of the non‑“‑TR” version. The same critical speed performance gap and physical package incompatibility persist, rendering this part equally unsuitable for the original design where speed or package matching is strictly required.
Analysis ID: 2B69-EB31000
Based on part parameters and for reference only. Not to be used for procurement or production.
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