1. LM324EDR2G Substitution Conclusion In general low‑frequency applications, the LM324EDR2G can serve as a replacement for the original LM324D. However, key performance differences may affect design margins in certain circuits. The differences are threefold: First, the input bias current increases from TI’s 20 nA to onsemi’s 90 nA. In circuits requiring high input impedance or those driven by high‑impedance sensors, this may introduce larger input error currents. Second, onsemi’s datasheet does not explicitly specify slew rate and quiescent supply current, whereas TI’s values of 0.5 V/µs slew rate and 1.4 mA per channel are critical design references. In applications handling fast transient signals or with strict power constraints, the actual response speed and power consumption after substitution become uncertain. Third, onsemi’s input offset voltage is slightly better (2 mV vs. 3 mV), and its maximum supply voltage is marginally higher (32 V vs. 30 V), offering a slight advantage in applications where precision is less critical but a wider voltage range is needed. Substitution is suitable for basic circuits such as DC amplification, filtering, and comparators, where bandwidth, slew rate, and input errors are not critical. If the original design relies on TI’s specified dynamic performance or low input bias parameters, bench verification is recommended prior to substitution.