Original Part
Alternative Part
1. LM258DGKR Substitution Conclusion
In most general applications, the LM258DGKR can serve as a substitute for the AS358MMTR-G1. Their key parameters are highly aligned, including input bias current, output current, minimum supply voltage, and package. The primary difference lies in the LM258DGKR’s slightly lower maximum supply voltage rating (32V vs. 36V), making it unsuitable if the original design operates close to 36V. The LM258DGKR provides specified slew rate (0.3 V/µs) and gain bandwidth product (700 kHz), offering a basis for evaluating circuit dynamic performance, whereas these parameters are unspecified for the original part. Additionally, the LM258DGKR features a significantly lower quiescent current per channel (500 µA vs. 700 µA), resulting in reduced power dissipation and thermal load, which is a clear advantage. As long as the system supply voltage does not exceed 32V and dynamic performance requirements are met, this substitution is both feasible and beneficial.
2. LM358ST Substitution Conclusion
The LM358ST is a viable substitute with distinct and specific applicability. Its key differences are: first, its maximum supply voltage is further reduced to 30V, which is 6V lower than the original part, strictly limiting its use in higher-voltage applications; second, it specifies a higher slew rate (0.6 V/µs) and gain bandwidth product (800 kHz), offering better dynamic performance than the LM258DGKR and more likely matching or exceeding the potential performance of the original device; most notably, it is AEC-Q100 qualified, meeting automotive-grade standards for reliability and environmental endurance, rather than just consumer or industrial grades. For applications below 30V, especially in automotive electronics or other high-reliability scenarios, the LM358ST represents an excellent substitute or even an upgrade. For general industrial or consumer applications, its voltage limitation remains the primary consideration.
Analysis ID: F7AE-2B54000
Based on part parameters and for reference only. Not to be used for procurement or production.
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