Original Part
SRAM - Asynchronous Memory IC 4Mbit Parallel 55 ns 48-TFBGA (6x8)
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. IS61WV25616EDBLL-10BLI-TR Substitution Conclusion
This part is a direct and highly viable substitute. It maintains complete consistency with the original component in core specifications: capacity, organization, interface, and package. The key differences are a significant improvement in access time from 55ns to 10ns, and a slightly relaxed minimum supply voltage from 2.5V to 2.4V. Substituting with this part will substantially increase the theoretical speed limit of the memory system while preserving hardware compatibility. This provides the microprocessor with greater timing margin and offers slightly more lenient, and thus better, power supply voltage compatibility. In most systems originally designed for 55ns timing, directly replacing with this 10ns device will ensure stable operation with significant performance headroom.
2. IS64WV25616EDBLL-10BLA3-TR Substitution Conclusion
This part is also a feasible substitute from both electrical and packaging perspectives. It shares identical key specifications (4Mbit, 256Kx16, parallel interface, 48-TFBGA) with the original part and the aforementioned IS61 variant, including the same 10ns access time and 2.4V–3.6V supply voltage range. The prefix "IS64" differs from the original "IS62" and the first substitute's "IS61", indicating it belongs to a different product sub-family within ISSI. This may imply subtle distinctions in internal process technology or test specifications, but these do not affect its fundamental functionality and interface as an asynchronous SRAM. From a parametric standpoint, the substitution feasibility conclusion aligns with that for the IS61 part: hardware compatible, offering higher-speed performance and slightly wider voltage adaptability.
Analysis ID: 51DB-7F36000
Based on part parameters and for reference only. Not to be used for procurement or production.
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