1. 71V65603S100BQG Substitution Conclusion From the perspective of hardware interface and core specifications, the 71V65603S100BQG can serve as a functional replacement for the original part. Both devices are identical in memory type (ZBT SRAM), density (9Mbit), organization (256K x 36), data interface (Parallel), operating voltage (3.3V), and package (165-TBGA). The key difference lies in performance: the replacement part offers a significantly faster access time (5 ns) compared to the original (7.5 ns), and its clock frequency (100 MHz) is higher than the original's (approximately 133 MHz equivalent). This results in greater data throughput and improved timing margin with the substitute. When implementing this substitution, it is critical to verify that the original system's timing controller (e.g., FPGA/ASIC) can accommodate the faster clock and tighter setup/hold time requirements. If the system was originally designed around the slower timing of the original part, backward compatibility is generally achievable. However, if the system relies on timing margins close to the original part's limits, full timing convergence re-validation is necessary.