1. LP358DR Substitution Conclusion Direct substitution is feasible, but application limitations arising from its ultra-low power consumption and low-speed characteristics must be considered. Compared to the original LM358MX, the primary differences are: a substantial reduction in quiescent current (54µA vs. 800µA), which can significantly extend battery life in portable devices. However, this comes at the cost of extremely low bandwidth and slew rate (GBW 100kHz, SR 0.05V/µs). Consequently, it is only suitable for DC or ultra-low-frequency signal processing (e.g., slow-varying sensor signals, low-power comparators) and cannot be used for audio or fast signal conditioning. Additionally, its output drive capability is weaker (10mA vs. 30mA), which may affect capacitive load driving or direct driving of low-impedance loads. If the application involves low-frequency, low-power operation with modest drive requirements, it serves as a perfect substitute. If dynamic signals or stronger output capability are required, substitution is not viable.