1. BU7487F-E2 Substitution Conclusion Direct substitution is not recommended. The discrepancies present critical barriers: first, its minimum operating voltage is 3V, higher than the original part's 1.8V, rendering it completely non‑functional in single‑supply or battery‑powered systems below 3V (e.g., within the 1.8V–3V range). Second, its quiescent current is as high as 6mA, far exceeding the original's 90µA (total for four channels)—a difference of nearly 70×—which would cause a sharp increase in system power consumption, unacceptable in low‑power‑sensitive applications. Although its bandwidth (10 MHz) and slew rate (10 V/µs) are higher, its input offset voltage (1 mV) is worse than the original's (500 µV), introducing greater DC error. Substitution may only be cautiously evaluated in specific scenarios where the supply voltage is always above 3V, power consumption is completely non‑critical, and higher speed is urgently required.