Temperature sensing accuracy and range
The LM75CIM-3/NOPB: The ±2°C figure is the one that governs most system-level thermal management decisions — a fan-control or over-temperature shutdown threshold programmed at 85°C has a worst-case trip window of 83°C to 87°C, which is tight enough for processor throttling but marginal for precision oven compensation.
I²C interface and 9-bit resolution
Communication is over a standard I²C bus, with the sensor acting as a slave device. The 9-bit resolution yields a temperature step of 0.5°C per LSB — the output register updates at a nominal conversion rate of once per 100 ms. The I²C address is set by the three-state pin, allowing up to eight devices on the same bus without an address conflict.
Supply rail and package fit
The NOPB suffix indicates lead-free (RoHS-compliant) plating.
Features for system integration
On-chip features include an output switch, programmable temperature limit, and shutdown mode. The OS (overtemp shutdown) pin is an open-drain output that asserts when the measured temperature exceeds the programmed TOS limit — this can directly gate a fan or trigger a processor interrupt without polling the I²C bus. Shutdown mode reduces supply current to under 10 µA for battery-backed or low-power idle states.