What the AEC-Q100 grade and temperature range mean for your BOM
The LMT85QDCKTQ1 is an analog local temperature sensor from the Automotive, AEC-Q100 series, meaning it has passed the stress and reliability qualification required for automotive-grade ICs — including extended temperature cycling, ESD, and latch-up testing per AEC-Q100. Its sensing range covers -50°C to 150°C, which suits under-hood or engine-bay monitoring where ambient temperatures can exceed 125°C. The output is an analog voltage with a slope of 8.2 mV/°C, so a microcontroller ADC can read temperature directly without a digital interface. Accuracy is ±2.7°C across the full range — tight enough for thermal shutdown thresholds or coolant temperature monitoring, though not for precision thermometry.
Package and board-fit: SC-70 (SOT-363) footprint
Housed in a 6-pin SC-70 (SOT-363) package, the LMT85QDCKTQ1 has a 0.65 mm lead pitch and a body width of 1.25 mm.
Texas Instruments lists no official successor or cross-reference for this part. For a BOM line, it is a single-source item; if a second source is needed, look for pin-compatible analog temperature sensors in SC-70 with the same supply range and output slope — but no direct drop-in is documented here.