The MCP9803T-M/MS: RoHS3 compliant, so it clears EU regulatory requirements without exemption paperwork.
Temperature accuracy and range — what the numbers mean for your thermal design
The ±1°C figure holds under the test condition of -10°C to 85°C; outside that band the error can widen to ±3°C. For a system that needs better than ±2°C at the high end — say, monitoring a power module junction — budget the wider tolerance. The sensor covers the full industrial and automotive under-hood temperature band without derating. A 125°C-rated local sensor means it can sit on a hot PCB near a regulator or processor and still report valid data.
I²C/SMBus interface and feature set
Communicates over the standard I²C or SMBus two-wire bus — no proprietary protocol, so it ties directly to most MCU I²C peripherals without a level translator. Built-in features include programmable resolution (up to 11 bits), one-shot conversion for low-power polling, a programmable temperature limit with an output switch, and a shutdown mode that drops quiescent current to near zero. These are useful for battery-powered or intermittent-duty systems where the sensor only needs to wake up on a schedule.
Housed in an 8-MSOP package (3.00 mm body width, 0.118-inch pitch), surface-mount, with a supplier device package of 8-MSOP. The small footprint suits space-constrained boards — think sensor nodes, portable instruments, or multi-channel thermal monitoring arrays. Store the reels dry: MSOP packages are moisture-sensitive, and the reel seal should be kept intact until reflow.