1. Substitution Conclusion for AT30TS74-SS8M-B The AT30TS74-SS8M-B serves as an excellent and advantageous direct replacement for the TMP75AID. It maintains full compatibility in core functionality, package, and digital interface while offering broader applicability and enhanced system design flexibility. Specifically: First, the AT30TS74 extends the lower temperature measurement limit to -55°C, surpassing the TMP75AID's -40°C, enabling reliable operation in more demanding low-temperature environments. Second, its lower supply voltage limit is reduced to 1.7V, significantly better than the TMP75AID's 2.7V. This allows direct compatibility with ultra-low-voltage logic systems such as 1.8V, substantially expands the effective operating voltage range for battery-powered devices, and contributes to extended battery life. Although both share the same nominal accuracy (±2°C) and resolution (11-bit), and the AT30TS74 lacks the "Shutdown Mode" for refined power management, its wider operating condition range ensures that in the vast majority of applications, it not only enables a pin-to-pin hardware replacement but also provides end products with greater environmental resilience and power supply design margin.