Original Part
Alternative Part
1. BA3404FVM-TR Substitution Conclusion
Direct substitution is not recommended. Although both are dual-channel general-purpose operational amplifiers and the BA3404FVM-TR offers slight advantages in slew rate (1.2 vs. 0.6 V/µs) and maximum supply voltage (36V vs. 30V), critical differences make it a high-risk replacement. First, its output stage is push-pull, whereas the original LM258WPT features an open-drain output. The BA3404FVM-TR cannot directly replace the LM258WPT in applications requiring open-drain outputs for level shifting or "wired-AND" functionality. Forced substitution may cause circuit malfunction or even damage. Second, its quiescent current (2mA) is nearly three times that of the original part (700µA), leading to significantly higher power consumption, which is unsuitable for power-sensitive designs. Finally, its minimum operating voltage (4V) is higher than the original's (3V), rendering it non-functional within the 3V to 4V range and reducing power supply compatibility.
2. LM2904AQTH-13 Substitution Conclusion
This part can serve as a direct substitute in most applications, but a degradation in dynamic performance must be considered. The LM2904AQTH-13 aligns closely with the original LM258WPT in core architecture, package (8-TSSOP), operating voltage range (covering and slightly exceeding the original), and key DC parameters such as quiescent current (700µA), input bias current (20nA), and offset voltage (2mV). It also meets the AEC-Q100 automotive-grade qualification, forming the basis for a reliable substitution. The differences lie in its lower dynamic performance parameters: its slew rate (0.3 vs. 0.6 V/µs) and gain-bandwidth product (700kHz vs. 1.1MHz) are approximately half those of the original part. This will result in reduced large-signal response speed and gain capability at higher frequencies. Additionally, its output drive current (40mA vs. 60mA) is slightly lower. In applications requiring high signal frequency, fast step response, or higher output current, substituting with this part may fail to meet the original design's performance targets. However, for common low-frequency, DC, or circuits with less stringent dynamic performance requirements, this part is a viable alternative.
Analysis ID: F5FE-55EF000
Based on part parameters and for reference only. Not to be used for procurement or production.
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