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 Substitution Conclusion
As a same-brand (ISSI) product from the same series, the IS61WV25616BLL-10BLI is fully compatible in terms of package (48-TFBGA), density (4Mbit), organization (256K x 16), and interface (parallel asynchronous), making it a hardware-compatible drop-in replacement. The key differences are its significantly faster access time of 10ns (compared to the original 55ns) and a slightly wider operating voltage range (2.4V–3.6V). This device is fully backward compatible in timing with the original part, offering a potential system performance improvement. The wider voltage range also enhances power supply flexibility. However, attention should be paid to PCB layout and routing due to the higher-speed signals, to prevent potential signal integrity issues. Overall, this is a direct and performance-enhanced substitute.
2. 71V416L15BEG8 Substitution Conclusion
The 71V416L15BEG8 matches the original part in key specifications (4Mbit, 256K x 16, parallel asynchronous). The package is also a 48-ball BGA (described as 48-CABGA), though its 9x9mm footprint may present a mechanical difference compared to the original 6x8mm TFBGA package; the pad layout must be verified. Differences include a faster 15ns access time (versus the original 55ns) but a narrower operating voltage range (3.0V–3.6V, compared to the original 2.5V–3.6V). Direct substitution is not feasible if the original system operates below 3.0V. Furthermore, potential differences in package outline and ball map may require PCB design modifications. This device can be considered a performance upgrade alternative only if the system supply voltage meets its requirements and package compatibility is confirmed.
Analysis ID: 3D33-976B000
Based on part parameters and for reference only. Not to be used for procurement or production.
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