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 15 ns 48-CABGA (9x9)
1. IS61WV25616BLL-10BLI-TR Substitution Conclusion
This part is a highly viable substitute. It shares the same manufacturer (ISSI), memory density (4Mbit), organization (256K x 16), interface (Parallel), and physical package (48-TFBGA) as the original component, ensuring direct hardware and layout compatibility. The key difference lies in its faster access time (10 ns vs. the original's 55 ns). This represents a significant performance improvement and provides full electrical downward compatibility, posing no risk to meeting the original timing budget. However, the faster speed may impose stricter requirements on system signal integrity. Additionally, its operating voltage range (2.4V to 3.6V) has a slightly lower minimum than the original (2.5V), offering better compatibility. Conclusion: This part is a suitable and performance-enhanced replacement.
2. 71V416L15BEG8 Substitution Conclusion
The feasibility of substituting with this part is low and requires careful evaluation. While its core memory parameters (4Mbit, 256K x 16, parallel) match the original, several critical discrepancies exist. First, its operating voltage range (3.0V to 3.6V) is narrower and has a higher minimum than the original's (2.5V to 3.6V). If the system operates below 3.0V (e.g., within the 2.5V-3.0V range), this part will be incompatible. Second, although both share the 48-TFBGA package designation, the noted footprint dimensions (9x9) likely differ from the original's (6x8), posing a direct risk to physical and ball-out compatibility. Finally, the manufacturer change from ISSI to Renesas necessitates consideration for supply chain and potential software/driver adaptation. Conclusion: Direct substitution is not recommended unless it can be rigorously confirmed that the system voltage is always ≥3.0V and the package is mechanically compatible.
Analysis ID: 40DB-258B000
Based on part parameters and for reference only. Not to be used for procurement or production.
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