Original Part
SRAM - Asynchronous Memory IC 4Mbit Parallel 10 ns 48-CABGA (9x9)
Alternative Part
SRAM - Asynchronous Memory IC 4Mbit Parallel 55 ns 48-TFBGA (6x8)
SRAM - Asynchronous Memory IC 4Mbit Parallel 55 ns 48-TFBGA (6x8)
1. IS62WV25616BLL-55BLI Substitution Conclusion
This device is fully compatible with the original part in terms of functional organization and can serve as a lower-speed, wider-voltage-range alternative. However, it is not a direct pin-to-pin (P2P) replacement. The key differences are as follows: First, its access/cycle time is 55ns, significantly slower than the original's 10ns. This makes the device a potential system performance bottleneck in high-speed applications; it is only suitable for systems with relaxed timing requirements. Second, it features a wider operating voltage range (2.5V to 3.6V) compared to the original's 3.0V to 3.6V, offering better compatibility, particularly in multi-voltage or battery-powered scenarios. Third, and most critically, its package footprint (6x8mm TFBGA) and ball map differ from the original's (9x9mm CABGA). It cannot be directly soldered onto the existing PCB pads; a board layout redesign is mandatory. Substitution is feasible only if the system can tolerate the lower speed and the associated PCB modifications are acceptable.
2. IS62WV25616BLL-55BLI-TR Substitution Conclusion
The substitution conclusion for this part is identical to that of the IS62WV25616BLL-55BLI. The "-TR" suffix typically denotes only the Tape and Reel packaging format for automated assembly. The chip's electrical characteristics, package dimensions, and pinout are exactly the same as the version without the "-TR" suffix. Therefore, it is also a functionally compatible alternative but with significantly reduced speed and a non-matching package. The decision to use the "-TR" version depends solely on the production line's assembly process requirements (tape-and-reel vs. tray) and does not affect the technical feasibility assessment of the substitution itself.
Analysis ID: E176-65AF000
Based on part parameters and for reference only. Not to be used for procurement or production.
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