1. SA5532AD Substitution Conclusion The SA5532AD can serve as a replacement for the NE5532D, but it is not a drop‑in substitute and requires PCB redesign. Two critical differences must be considered: the reduced supply voltage range and package compatibility. Specifically, the SA5532AD operates from 10 V to 30 V, which is narrower than the NE5532D’s 6 V to 40 V range. If the original circuit operates below 10 V or above 30 V, compatibility cannot be achieved. Additionally, the SA5532AD is housed in an 8‑SOIC package, while the NE5532D uses a 16‑SOIC package. The pinout and footprint differ completely, so the SA5532AD cannot be mounted on the same PCB pads; a new board layout is necessary. Apart from these two points, the key performance parameters—such as bandwidth, slew rate, and quiescent current—are nearly identical between the two devices. Provided the supply voltage and package constraints are met, the SA5532AD can deliver the same circuit functionality.