Original Part
SRAM - Asynchronous Memory IC 4Mbit Parallel 10 ns 48-CABGA (9x9)
Alternative Part
SRAM - Asynchronous Memory IC 4Mbit Parallel 10 ns 48-TFBGA (6x8)
SRAM - Asynchronous Memory IC 4Mbit Parallel 10 ns 48-TFBGA (6x8)
1. Substitution Conclusion for IS61WV25616BLL-10BLI
From the perspective of core electrical functionality and performance parameters, the IS61WV25616BLL-10BLI can serve as a complete functional replacement for the original part. All key specifications—4Mbit density, 256K x 16 organization, 10ns access time, and parallel interface—are identical, ensuring full logical and speed compatibility. The differences lie in the operating voltage range and physical package. The ISSI part offers a wider operating voltage range (2.4V-3.6V) compared to the original (3.0V-3.6V), providing superior voltage tolerance. This makes it particularly suitable for systems with slight voltage fluctuations or applications requiring supply voltages down to 2.4V, though it operates without issue within the original design's 3.0V-3.6V range. The packages differ (original: 48-CABGA, ISSI: 48-TFBGA). While the pin count is the same, the footprint and pad layout are incompatible, preventing a direct pad-for-pad replacement on the existing PCB. A PCB layout redesign is mandatory. In summary, the part is electrically substitutable but not physically drop-in compatible.
2. Substitution Conclusion for IS61WV25616BLL-10BLI-TR
The IS61WV25616BLL-10BLI-TR is identical to the IS61WV25616BLL-10BLI in both electrical performance and physical characteristics. The "-TR" suffix typically denotes Tape and Reel packaging, intended for automated assembly lines. Therefore, the substitution conclusion is identical to the previous part: it is fully compatible in terms of electrical parameters and functionality, with the added benefit of a wider voltage range, making it an excellent electrical substitute. However, it faces the same physical incompatibility issue with the original package (48-CABGA vs. 48-TFBGA). Implementation requires a PCB redesign for the new 48-TFBGA footprint or the use of an adapter board. For volume production, the -TR variant in tape and reel packaging is the more suitable choice.
Analysis ID: 3B0F-E524000
Based on part parameters and for reference only. Not to be used for procurement or production.
SkyChip © 2026, Email: sales@skychip.com