1. LM86CIMM/NOPB Substitution Conclusion Substitution is only feasible under highly constrained conditions. Key deviations include: a severely narrowed local temperature measurement range (0°C to 85°C vs. -40°C to 125°C), rendering the device inoperative in low-temperature environments from -40°C to 0°C, with a high‑temperature ceiling reduced by 40°C; significantly degraded local temperature resolution (7‑bit vs. 11‑bit), resulting in coarser temperature data and larger quantization error; and poorer accuracy (±3°C vs. ±1°C), leading to a maximum temperature reading error three times that of the original part under typical 25°C–125°C test conditions. Collectively, these differences mean the LM86 fails to match the original device in three core performance metrics: operating temperature range, measurement accuracy, and resolution. Direct substitution would degrade system performance or cause failure in wide‑temperature or high‑precision applications.