1. Substitution Assessment for BU7242SFVM-TR Marginally acceptable, but requires careful evaluation. The BU7242SFVM-TR is compatible with the original part in terms of core supply range (1.8V to 5.5V), input bias current (1pA), and package. However, its key performance parameters are degraded: the gain bandwidth product (900kHz vs. 1MHz) and slew rate (0.4V/µs vs. 0.5V/µs) are slightly lower, resulting in a minor reduction in dynamic response and signal processing speed. More critically, the input offset voltage is significantly higher (1mV vs. 750µV), which directly compromises DC accuracy and may introduce non-negligible errors in applications requiring high-precision amplification. Furthermore, its quiescent current is higher (180µA vs. 150µA typical), making it less suitable for power optimization in battery-powered devices. This substitute is only recommended for applications with relaxed requirements for bandwidth, precision, and power consumption. 2. Substitution Assessment for TSV852AIYST This is a high-performance, enhanced substitute for non-low-voltage applications, particularly suitable for automotive or high-load scenarios. While the TSV852AIYST cannot cover ultra-low-voltage applications down to 1.8V due to its higher minimum operating voltage (2.3V vs. 1.8V), it offers superior performance in other areas. It features a higher gain bandwidth product (1.3MHz) and slew rate (0.7V/µs), providing faster signal response. Its output drive current is several times stronger (70mA vs. 15mA), enabling it to directly drive heavier loads such as LEDs or small motors. The input offset voltage (800µV) is comparable to the original part. However, its significantly larger input bias current (27nA vs. 1pA) can induce substantial offset errors in high-impedance sensor signal chains, which is the primary limitation for its use in high-precision analog front-ends. Additionally, it is AEC-Q100 qualified, offering higher reliability.