1. TLC081CDR Substitution Conclusion From the perspective of core performance parameters, the TLC081CDR outperforms or closely matches the NE5534AD in most electrical specifications. However, its supply voltage range (4.5V–16V) is significantly narrower than that of the NE5534AD (6V–40V). This defines the critical precondition for substitution feasibility: if the original circuit operates within 16V, the TLC081CDR can serve as a high‑performance replacement. It offers lower quiescent current (1.9mA vs. 4mA), extremely high input impedance (bias current 2pA vs. 500nA, suitable for high‑impedance signal sources), higher slew rate (19V/µs vs. 13V/µs), and stronger output drive capability (57mA vs. 38mA). Conversely, if the original system employs a supply voltage above 16V, the TLC081CDR cannot be directly substituted due to its limited voltage tolerance. Additionally, the TLC081CDR requires no external frequency compensation (the NE5534AD needs an external compensation capacitor). It should be noted that its input offset voltage (390µV) is slightly better but not a decisive advantage, and both devices share the same bandwidth (10MHz). Provided voltage compatibility is satisfied, the TLC081CDR represents an upgrade option for low‑power, high‑input‑impedance applications, though it is not a substitute in wide‑voltage applications.