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. LM86CIMMX/NOPB Substitution Conclusion
The LM86CIMMX/NOPB is not a viable direct substitute for the EMC1402-3-ACZL-TR. The primary limitation is its operating temperature range: both its local and remote sensor ranges are restricted to 0°C to 85°C. In contrast, the original component supports a significantly wider range of -40°C to 125°C for the local sensor and -64°C to 191°C for the remote sensor. Consequently, the LM86 is unsuitable for applications involving low-temperature or high-temperature (>85°C) environments.
Furthermore, its specified accuracy is ±3°C maximum (versus ±1°C for the original), and its local temperature resolution is limited to 7 bits (compared to 11 bits). This results in a substantial degradation in both the precision and granularity of temperature monitoring. For systems demanding high-accuracy measurement or designed for extended temperature ranges, this substitution introduces significant performance risk.
2. LM90CIMMX/NOPB Substitution Conclusion
Similarly, the LM90CIMMX/NOPB cannot fully replace the EMC1402-3-ACZL-TR. Its key constraints mirror those of the LM86: it supports only a 0°C to 85°C temperature range, failing to meet the broad thermal requirements of the original part. Moreover, its accuracy is further reduced to ±4°C maximum, and its local resolution remains at only 7 bits. This creates an even greater deficit in measurement accuracy and fine-grained temperature sensing compared to the target device.
While some functional features—such as programmable limits and shutdown mode—overlap with the original, the severe deficiencies in core temperature-sensing performance (range, accuracy, resolution) are decisive. This part may only be considered for applications with minimal demands on temperature range and precision and cannot be recommended as a direct replacement.
Analysis ID: 1F01-E72A000
Based on part parameters and for reference only. Not to be used for procurement or production.
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