1. EMC1402-4-ACZL-TR Substitution Conclusion Based on core functionality and package compatibility, the EMC1402-4-ACZL-TR is a highly feasible direct substitute for the original LM86CIMM/NOPB. The key differences are as follows: 1) A wider operating and sensing temperature range (local/remote both support -40°C to 125°C and beyond). This makes the device suitable for more demanding ambient conditions and capable of monitoring remote diodes (e.g., CPU, GPU) with higher or lower junction temperatures. 2) Superior measurement accuracy (typically ±1°C vs. ±3°C) and higher resolution (11-bit vs. 7/10-bit). This enables the system to obtain more precise and granular temperature data, which is beneficial for improving thermal management accuracy. 3) The feature set lacks a "Shutdown Mode" but retains "Standby Mode." While it cannot achieve the lowest-power complete shutdown, the standby mode still significantly reduces power consumption. The practical impact of this difference on the system's power design requires evaluation.