1. STLM75M2F Substitution Conclusion The STLM75M2F can serve as a direct replacement for the LM75BIM-5/NOPB. Both devices are fully compatible in terms of core functionality, temperature range (-55°C to 125°C), resolution (9-bit), package (8-SOIC), and accuracy (±2°C). The key differences are as follows: First, the STLM75M2F offers a wider supply voltage range (2.7V to 5.5V) compared to the original part’s 3V to 5.5V, providing better adaptability in low-voltage systems and improved reliability near the 3V threshold. Second, the STLM75M2F explicitly supports both I2C and SMBus protocols, whereas the original part is only specified for I2C. This makes the STLM75M2F more stable in systems requiring SMBus timing compliance. Third, the STLM75M2F includes an additional “Standby Mode” feature, which further reduces power consumption during idle periods, enhancing energy-saving flexibility. In summary, all differences represent functional enhancements or expanded compatibility and do not prevent direct substitution. However, it is necessary to verify that the I2C slave address and register mapping are identical, and to validate voltage margins and communication timing in the actual circuit.