Original Part
SRAM - Asynchronous Memory IC 4Mbit Parallel 10 ns 48-CABGA (9x9)
Alternative Part
SRAM - Asynchronous Memory IC 4Mbit Parallel 15 ns 48-CABGA (9x9)
SRAM - Asynchronous Memory IC 4Mbit Parallel 10 ns 48-TFBGA (6x8)
1. 71V416S15BEGI8 Substitution Conclusion
The difference between this part and the original part lies in the degraded access time and write cycle time, from 10ns to 15ns, resulting in slower read/write speeds. Direct substitution in a system originally designed with 10ns timing may cause timing violations or performance degradation during high-speed operations. Both are manufactured by Renesas and are identical in memory density, organization, interface, voltage range, and package, offering excellent physical compatibility. In applications where the system clock frequency is not high, where timing margin exists, or where speed requirements are not stringent, it can serve as a direct, speed-degraded compatible alternative. However, it is not viable in designs pursuing peak performance or strictly adhering to the original timing specifications.
2. IS61WV25616EDBLL-10BLI-TR Substitution Conclusion
There are two core differences between this part and the original. First, it features a wider supply voltage range (2.4V–3.6V vs. 3.0V–3.6V), providing better adaptability at lower voltages, though it operates normally within the common 3.0V–3.6V range. Second, the package dimensions differ (48-TFBGA (6x8) vs. 48-TFBGA/CABGA (9x9)), resulting in incompatible physical footprint and pinout. This prevents direct soldering onto the original part's PCB pads. Although its key performance parameters (10ns speed, 4Mbit density, 256K x 16 organization) match the original, the fundamental package difference necessitates a PCB layout redesign. Direct replacement on existing boards is impossible. It can only be considered as an electrically equivalent alternative in new designs, requiring corresponding layout adjustments.
Analysis ID: D811-138C000
Based on part parameters and for reference only. Not to be used for procurement or production.
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