1. LM86CIMM/NOPB Substitution Conclusion Direct substitution is not viable; it can only be considered for limited, downgraded applications. The core discrepancies are as follows: First, the operating temperature range is severely reduced. The LM86 supports a local and remote measurement range of 0°C to 85°C, whereas the original EMC1072 offers a local range of -40°C to 125°C and a significantly wider remote range (-64°C to 191°C). Consequently, the LM86 is unsuitable for environments below 0°C or above 85°C. Second, accuracy is notably degraded. The LM86 has a typical accuracy of ±3°C, far inferior to the EMC1072's ±1°C high accuracy within its core temperature range. This degradation compromises system temperature measurement accuracy and control reliability. Finally, there is a resolution difference. The LM86's local resolution is only 7-bit, compared to the EMC1072's 11-bit, resulting in insufficient granularity for sensing local temperature variations. Substitution may only be considered if the application environment is confirmed to remain strictly within 0–85°C and if requirements for temperature accuracy and resolution are not critical, with a full re-evaluation of system performance being mandatory.