1. LM324WPT Substitution Conclusion The LM324WPT can serve as a direct replacement for the LM324PWRG3. Both devices exhibit high consistency in core architecture, supply voltage range, package, and most general-purpose parameters, demonstrating good fundamental compatibility. Key differences include: the LM324WPT has a slightly lower slew rate (0.4V/µs vs. 0.5V/µs), resulting in marginally slower large-signal high-frequency response; its output stage is explicitly specified as push-pull, whereas the original part does not specify this—the push-pull configuration typically provides improved rail-to-rail output drive capability, reflected in the LM324WPT's higher output current (40mA vs. 30mA); additionally, the LM324WPT offers slightly better input offset voltage (2mV vs. 3mV), which benefits DC accuracy. Overall, these differences have limited impact in most general-purpose amplifier circuit applications, making the substitution viable. However, in applications with stringent slew rate or output dynamic performance requirements, bench verification is recommended.