1. AT30TS74-SS8M-B Substitution Conclusion From a core functionality and package perspective, the AT30TS74-SS8M-B can serve as a substitute for the TMP175AIDR. Both are local digital temperature sensors featuring an I²C interface and SOIC-8 package, with basic one-shot trigger and programmable resolution capabilities. The AT30TS74 supports a wider supply voltage range (1.7V to 5.5V), granting it an advantage in low-power systems. This substitution, however, involves performance trade-offs. The key differences are as follows: The AT30TS74 offers an accuracy of ±2°C over the -20°C to 100°C range, which is lower than the TMP175AIDR's ±1.5°C. This results in a reduction in absolute accuracy for critical temperature measurement scenarios. Furthermore, the AT30TS74 lacks the shutdown and standby modes present in the TMP175AIDR, which may limit its suitability in applications where ultra-low power consumption is paramount. On the other hand, the AT30TS74 provides a higher 11-bit resolution (though its practical benefit is limited by the ±2°C accuracy) and a wider operating temperature lower limit (-55°C). Ultimately, the feasibility of this substitution depends on the specific application requirements. If the application demands stringent measurement accuracy and ultra-low power modes, the substitution should be approached with caution. If the application prioritizes a wider voltage operating range and can tolerate a more relaxed accuracy specification, then the substitution is viable.