1. LM2902D Substitution Conclusion Under conditions of fundamental electrical compatibility and identical package footprint, the LM2902D can serve as a direct replacement for the LM2902QS14-13, though its applicability is constrained by the supply voltage range. The key differences are as follows: the LM2902D operates over a narrower supply range (3V–26V vs. 2V–36V), making it unsuitable for systems operating below 3V or above 26V (particularly near 36V). Its gain-bandwidth product (1.2 MHz vs. 700 kHz) and slew rate (0.5 V/µs vs. 0.3 V/µs) are slightly higher, which benefits dynamic response, but its output current capability is somewhat lower (30 mA vs. 40 mA), potentially affecting high-load drive performance. Provided the system supply remains within 3V–26V and does not rely on maximum output current, the LM2902D can be substituted successfully. Note, however, that the original part carries AEC-Q100 automotive qualification, whereas the LM2902D datasheet does not explicitly state this certification; compliance must be verified for automotive electronics applications.