Original Part
SRAM - Asynchronous Memory IC 4Mbit Parallel 10 ns 48-TFBGA (6x8)
Alternative Part
SRAM - Asynchronous Memory IC 4Mbit Parallel 12 ns 48-CABGA (9x9)
SRAM - Asynchronous Memory IC 4Mbit Parallel 12 ns 48-CABGA (9x9)
1. Substitution Conclusion for 71V416L12BEG8
Direct substitution is limited and requires careful evaluation. The 71V416L12BEG8 shares the same core density (4Mb, 256K x 16) and interface (Parallel) as the original part. However, three key differences exist:
First, its access/cycle time is 12ns, which is slower than the original's 10ns. This may fail to meet bus timing requirements in systems with stringent speed constraints.
Second, its operating voltage range is 3.0V to 3.6V, narrower than the original's 2.4V to 3.6V. This prevents operation below 3.0V, limiting its use in wide-voltage or low-power designs.
Third, while both use 48-pin packages, the original part is in a TFBGA (6x8mm), whereas the substitute is in a CABGA (9x9mm). The physical dimensions and pad layout are incompatible, necessitating a PCB redesign.
Substitution can only be considered if the system bus clock accommodates the 12ns access time, the supply rail is strictly above 3.0V, and a PCB revision is acceptable.
2. Substitution Conclusion for 71V416L12BEGI
The substitution conditions and limitations for the 71V416L12BEGI are identical to those for the 71V416L12BEG8.
Based on the provided parameters, the 71V416L12BEGI is technically identical to the 71V416L12BEG8 in all key specifications. The suffix "I" typically denotes a wider industrial temperature range or different packaging, but this does not alter the electrical characteristics or mechanical package properties.
Its deviations from the original part, IS61WV25616BLL-10BI-TR, are consequently the same: slower access speed (12ns vs. 10ns), a narrower operating voltage range (3.0V~3.6V vs. 2.4V~3.6V), and a physically incompatible package (CABGA vs. TFBGA).
Therefore, feasibility similarly depends on the system's timing margin, supply voltage, and willingness to modify the board layout.
Analysis ID: 612B-589E000
Based on part parameters and for reference only. Not to be used for procurement or production.
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