Original Part
SRAM - Synchronous, SDR (ZBT) Memory IC 9Mbit Parallel 8 ns 165-CABGA (13x15)
Alternative Part
SRAM - Synchronous, SDR (ZBT) Memory IC 9Mbit Parallel 150 MHz 3.8 ns 165-CABGA (13x15)
SRAM - Synchronous, SDR Memory IC 9Mbit Parallel 117 MHz 7.5 ns 165-TFBGA (13x15)
1. 71V65603S150BQGI8 Substitution Conclusion
From a core functionality and package perspective, the 71V65603S150BQGI8 is a complete drop-in replacement for the original part. Both devices share the same manufacturer, memory organization (256Kx36), voltage range (3.3V), and package (165-TBGA), providing a direct hardware-compatible foundation. The key difference lies in performance: the substitute part offers a significantly faster access time (3.8 ns) and equivalent clock frequency (150 MHz) compared to the original (8 ns). This represents a performance upgrade, enabling higher data throughput in the same system. However, it is critical to note that the higher clock frequency imposes stricter requirements on PCB layout and timing control. If the original system design lacks sufficient timing margin, a comprehensive timing re-validation may be necessary.
2. IS64LF25636A-7.5B3LA3-TR Substitution Conclusion
This part presents a potential substitution based on fundamental parameters, but critical functional differences necessitate rigorous evaluation. Its capacity, organization, voltage, and package are compatible with the original, and its access time (7.5 ns) is marginally better. The core discrepancy is in its technical description, listed as "SRAM - Synchronous, SDR," whereas the original part is explicitly defined as "SDR (ZBT)." The ZBT (Zero Bus Turnaround) architecture is a pipelined technology that eliminates wait states. Under specific read/write interleaving operation modes, the two devices may exhibit different timing behavior and maximum sustainable bandwidth. If the original system relies on the ZBT feature to achieve high throughput, this substitute may fail to meet performance requirements or cause timing violations. If the system only utilizes standard synchronous burst modes, it could serve as an alternative, but a full validation of all timing parameters for complete compatibility is still mandatory.
Analysis ID: 0B6E-E221000
Based on part parameters and for reference only. Not to be used for procurement or production.
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