1. TMP175AIDR Substitution Conclusion The TMP175AIDR is generally viable as a replacement, offering high compatibility in core electrical characteristics and package. However, there are key differences that require evaluation for the specific application. While the upper limit of its operating temperature range matches the original, its lower limit is raised by 15°C, and its feature set differs. The specifics are: 1) Temperature Range: Its minimum operating temperature is -40°C, compared to the original's -55°C, rendering it non-functional in extreme environments below -40°C. 2) Resolution & Accuracy: It offers improved 9-bit resolution and a better accuracy of ±1.5°C (from -25°C to 85°C), providing more precise measurements within the common temperature range. 3) Features: It adds "One-Shot" (single conversion) and "Programmable Resolution" functions. However, it lacks the original part's "Programmable Limits" feature, meaning the alarm threshold setting method is likely different and will require software adaptation.