2. Substitution Conclusion for BU7486F-E2 Substitution is conditionally possible but requires careful system evaluation. The BU7486F-E2 operates in the same order of magnitude as the original part in terms of bandwidth (10 MHz) and slew rate (10 V/µs), though its performance is lower (original: 61 MHz, 17 V/µs). It can process signals within a certain frequency range but will be inferior in high-frequency performance, settling time, and handling large signal transients. The most critical limitation is its output current of 12 mA, which is only about one-tenth of the original's 130 mA. This directly precludes its use in driving low-impedance or heavy loads, such as headphones, transmission lines, or the input capacitance of an analog-to-digital converter. Additionally, its input offset voltage (1 mV) is substantially higher than the original's 270 µV, introducing greater error in applications requiring high DC precision. Substitution should only be considered in circuits with moderate signal frequencies, very light loads, and low precision requirements, and system performance must be thoroughly validated. The difference in package width (4.40mm vs. 3.90mm) also requires attention during PCB layout.