1. LM258DRG4 Substitution Conclusion From a review of key performance parameters, the LM258DRG4 exhibits essential equivalence to the original part LM2904QS-13 in critical specifications such as gain-bandwidth product, slew rate, input bias current, and output current. Its package is also compatible. Therefore, it can be considered a functional substitute in most general-purpose amplification, filtering, or comparator circuits. Two technical differences require careful evaluation. First, its supply voltage range (3V to 32V) is narrower than that of the original part (2V to 36V). This precludes its use in applications requiring operation at the very low (2-3V) or high (32-36V) voltage extremes supported by the LM2904QS-13. Second, its input offset voltage (3mV) is slightly higher than the original part's 2mV. This may introduce marginally greater error in amplification circuits with stringent DC precision requirements. Furthermore, the original LM2904QS-13 is explicitly qualified to the AEC-Q100 automotive-grade standard. The LM258DRG4's material description does not specify this certification. For applications in automotive electronics or other fields with mandatory qualification requirements, this discrepancy is critical, and its certification status must be confirmed with the manufacturer. In summary, the LM258DRG4 is a viable substitute for non-automotive, general-purpose applications where the supply voltage is between 3V and 32V and sensitivity to input offset voltage is low. Outside these conditions, a more cautious assessment is required.