Original Part
SRAM - Asynchronous Memory IC 4Mbit Parallel 15 ns 48-CABGA (9x9)
Alternative Part
SRAM - Asynchronous Memory IC 4Mbit Parallel 10 ns 48-TFBGA (6x8)
SRAM - Asynchronous Memory IC 4Mbit Parallel 8 ns 48-TFBGA (6x8)
1. Substitution Conclusion for IS61WV25616EDBLL-10BLI-TR
From a technical specification standpoint, the IS61WV25616EDBLL-10BLI-TR is compatible with the original part, 71V416L15BEGI8, in core parameters: 4Mbit density, 256K x 16 organization, and parallel interface. However, several critical differences exist:
Faster Timing: It features a faster access time and write cycle time (10 ns vs. 15 ns), which can offer higher performance and potentially reduce timing margins in the system.
Broader Voltage Range: Its supply voltage range is wider (2.4V ~ 3.6V vs. 3V ~ 3.6V), providing greater flexibility for low-voltage applications. However, the system voltage must still be maintained at or above 3V to match the original design's requirements.
Significant Package Difference: The package is notably different (original: 48-CABGA, 9x9 mm; substitute: 48-TFBGA, 6x8 mm). Pinout and physical dimensions are likely incompatible. Direct substitution would require a PCB layout redesign or thorough pin-mapping verification.
In summary, this part can be a viable substitute only if package compatibility is resolved (e.g., via an adapter or design modification). Otherwise, it is not a drop-in replacement.
2. Substitution Conclusion for IS61WV25616EDBLL-8BLI-TR
The IS61WV25616EDBLL-8BLI-TR aligns with the original 71V416L15BEGI8 in fundamental specifications. Key differences are:
Shorter Timing: It has significantly shorter access and write cycle times (8 ns vs. 15 ns), offering a substantial performance boost suitable for high-speed applications. It is typically downward-compatible with the original timing requirements.
Identical Voltage Range: The supply voltage range is identical (3V ~ 3.6V), eliminating the need for power supply design adjustments.
Package Incompatibility: The package differs (original: 48-CABGA, 9x9 mm; substitute: 48-TFBGA, 6x8 mm). The mismatch in physical footprint and potential pin arrangement presents soldering and layout challenges for direct replacement.
Overall, this substitute offers superior electrical performance. However, package incompatibility is the primary obstacle. Substitution is feasible only if the system can accommodate the package change or if an interposer solution is implemented. Otherwise, it is not a direct replacement.
Analysis ID: 5049-EE69000
Based on part parameters and for reference only. Not to be used for procurement or production.
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