1. Substitution Conclusion for 71V65603S150BQGI From a core parameter perspective, the 71V65603S150BQGI is a high-performance, drop-in replacement for the original part (71V65703S85BQGI) with a high degree of feasibility. Both devices share the same manufacturer, density, organization, voltage, and package, and both are ZBT (Zero Bus Turnaround) architecture SRAMs, ensuring hardware compatibility and protocol consistency. The primary difference lies in performance: the replacement part features a significantly faster access time (3.8 ns vs. 8.5 ns) and a higher clock frequency (150 MHz). It offers superior bus rate and response speed compared to the original. Substitution not only fulfills all original functions but also provides potential headroom for improved timing margins or system performance. However, careful verification is required to ensure the system clock and control signals can support its higher operating frequency.