2. TSV358IST Substitution Conclusion The TSV358IST offers advantages in output drive capability and upper supply voltage range. However, its quiescent power is an order of magnitude higher, and its input bias current is excessively large, making it unsuitable as a direct drop‑in replacement for the original part. It can only be considered for specific use cases. Its primary strength is its high output current capability of 80mA, which allows it to drive heavier loads directly, such as small motors or LED arrays. Its quiescent current (500µA) is more than ten times that of the original, completely losing the core ultra‑low‑power characteristic. More critically, its input bias current (70 nA) is nearly 70,000 times higher than the original (1 pA). When handling weak current signals from high‑impedance sensors—such as photodiodes or pH electrodes—this will introduce substantial errors, rendering it entirely unsuitable for any precision or high‑impedance signal‑conditioning application. It is only appropriate for general‑purpose scenarios where power consumption and precision are not critical, but stronger output drive is required.