Original Part
Temperature Sensor Digital, Local/Remote -40°C ~ 125°C 11 b 8-MSOP
Alternative Part
Temperature Sensor Digital, Local/Remote 0°C ~ 85°C 7 b (Local), 10 b (Remote) 8-VSSOP
Temperature Sensor Digital, Local/Remote 0°C ~ 85°C 7 b (Local), 10 b (Remote) 8-VSSOP
1. LM86CIMM/NOPB Substitution Conclusion
Direct substitution is not feasible. Although both are SMBus digital temperature sensors supporting local/remote temperature measurement with compatible supply voltage and package size, the LM86CIMM exhibits significant limitations in key performance parameters, preventing it from covering the original part’s application range. The differences are as follows: First, the operating temperature range—the LM86CIMM supports only 0°C to 85°C for both local and remote sensing, which is far narrower than the EMC1402’s local range of –40°C to 125°C and remote capability up to 191°C. Thus, the LM86CIMM cannot be used in industrial‑grade wide‑temperature or high‑temperature environments. Second, accuracy and resolution—the LM86CIMM offers an accuracy of ±3°C, worse than the EMC1402’s typical ±1°C, and its local resolution is only 7‑bit (compared to 11‑bit). This results in poorer temperature granularity and absolute accuracy, making it unsuitable for applications requiring precise temperature monitoring. It may only be considered as a downgraded replacement in systems where the operating temperature is strictly confined to 0–85°C and accuracy requirements are extremely relaxed.
2. LM86CIMMX/NOPB Substitution Conclusion
Direct substitution is not viable, with feasibility identical to that of the LM86CIMM/NOPB. The LM86CIMMX and LM86CIMM are different packaging versions of the same die (typically “X” denotes tape‑and‑reel packaging), sharing identical technical specifications. The reasons for non‑substitutability relative to the original EMC1402 remain the same: limited operating temperature range of 0°C to 85°C, lower accuracy of ±3°C, and reduced local resolution. These differences likewise prevent this device from meeting potential design requirements such as wide‑temperature operation, high‑accuracy measurement, or higher‑resolution monitoring. It may only be considered as an alternative if the end‑application environment is guaranteed to remain within 0–85°C and the reduced accuracy is acceptable.
Analysis ID: C1AD-6C62000
Based on part parameters and for reference only. Not to be used for procurement or production.
SkyChip © 2026, Email: sales@skychip.com