Original Part
Alternative Part
1. LM2902T14-13 Substitution Conclusion
The LM2902T14-13 can serve as a cautious substitute for the MC3403PWR, provided package compatibility and matching input offset voltage are confirmed. However, key performance differences must be noted. Its slew rate (0.3 V/µs) and gain-bandwidth product (700 kHz) are both lower than those of the original part (0.6 V/µs, 1 MHz). This results in weaker performance for high-frequency signals or fast transient responses, potentially making it unsuitable for amplification circuits requiring higher speed.
On the positive side, its input bias current (20 nA) is significantly lower (vs. 200 nA original), which is advantageous for applications sensitive to input current, such as high-impedance sensor signal conditioning. It also features lower quiescent current (1 mA vs. 2.8 mA per channel), making it more suitable for low-power designs. Furthermore, its wider supply voltage range (3 V to 36 V) enhances power supply adaptability. Note that its higher output current capability (40 mA) requires careful load matching.
2. LM2902WPT Substitution Conclusion
The LM2902WPT shows good potential for substitution, but its dynamic performance requires specific evaluation. Its gain-bandwidth product (1.3 MHz) is higher than the original part's (1 MHz), supporting small-signal amplification at higher frequencies. However, its slew rate (0.4 V/µs) is slightly lower than the MC3403PWR's (0.6 V/µs), which may lead to marginally slower high-frequency response with large signals.
Similar to the other variant, its input bias current (20 nA) is significantly better than the original, benefiting precision DC applications. Additionally, its output stage is explicitly specified as a "push-pull" structure, which may offer more symmetrical source/sink current capability, though specific load compatibility should be verified. The supply voltage range (3 V to 30 V) offers a wider lower limit while maintaining the same upper limit. Its lower quiescent current (1.5 mA) aids in energy-efficient designs, and package compatibility is good.
Analysis ID: DDB5-0A0B000
Based on part parameters and for reference only. Not to be used for procurement or production.
SkyChip © 2026, Email: sales@skychip.com