Original Part
SRAM - Asynchronous Memory IC 4Mbit Parallel 10 ns 48-TFBGA (6x8)
Alternative Part
SRAM - Asynchronous Memory IC 4Mbit Parallel 10 ns 48-CABGA (9x9)
SRAM - Asynchronous Memory IC 4Mbit Parallel 12 ns 48-CABGA (9x9)
1. 71V416L10BEG8 Substitution Conclusion
The conclusion is a conditional substitution, requiring thorough verification of hardware compatibility. While the core specifications (4Mbit, 256Kx16, 10ns asynchronous parallel) are identical, two critical differences exist. First, the package compatibility is questionable. The original part uses a 6x8mm 48-TFBGA package, whereas the Renesas substitute is a 9x9mm 48-CABGA. The pad layout (footprint) and PCB land pattern are entirely different, preventing a direct drop-in solder replacement. Second, the operating voltage ranges differ. The original component supports a wide range of 2.4V to 3.6V, while the substitute requires 3.0V to 3.6V. In systems where the supply rail falls below 3.0V (e.g., 2.5V or 2.8V), the substitute will be non-functional.
2. 71V416L12BE Substitution Conclusion
The conclusion is a conditional substitution, requiring validation of both performance and hardware compatibility. Its situation is similar to the 71V416L10BEG8, except for speed. Three key differences are noted. First, the access time is slower (12ns vs. 10ns). With an unchanged bus timing budget, this part may fail to meet the system's maximum memory speed requirement, potentially causing read/write errors or necessitating a reduction in system clock frequency. Second, the package is incompatible (9x9mm 48-CABGA vs. 6x8mm 48-TFBGA), requiring a PCB redesign. Finally, its operating voltage range is narrower (3.0V-3.6V vs. 2.4V-3.6V), limiting its use in lower-voltage systems.
Analysis ID: 1B92-609E000
Based on part parameters and for reference only. Not to be used for procurement or production.
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