19.5 mV/°C ratiometric transfer function
The TMP236A4DCKR: The sensing range covers -10°C to 125°C, but the device itself operates from -50°C to 150°C ambient. That extra margin on the cold and hot ends means the sensor survives storage and transient excursions outside the measurement band without damage — useful for cold-chain logistics or engine-bay soak-back.
±4°C accuracy and the BOM temperature budget
Accuracy is specified as ±4°C across the -10°C to 125°C test condition. For a system that needs to detect a 5°C overtemperature trip, this tolerance consumes most of the guard band — the designer must account for the sensor error plus the ADC quantization and reference drift. If the application requires tighter than ±4°C at the system level, a trimmed or digital-output sensor is the alternative. The output is ratiometric, so the absolute voltage at a given temperature shifts with the supply. A 3.3 V rail that droops 100 mV moves the apparent temperature reading by roughly 5°C at the ADC — the supply tolerance becomes part of the accuracy budget.
SC-70-5 footprint and supply rails
Housed in a 5-lead SC-70 (SOT-353) package, the TMP236A4DCKR occupies roughly 2 mm × 2.1 mm of board area. The pinout is VDD, GND, VOUT, and two no-connect pins — the layout needs only a 100 nF decoupling cap at the supply pin, with the output trace kept short to the ADC input to avoid parasitic coupling. The quiescent current is not listed in the spec table, but for a ratiometric analog sensor it typically sits below 50 µA — negligible in a battery-powered design.
Active lifecycle and compliance
ROHS3 compliance is confirmed, which covers the EU RoHS exemption list through 2024 — no additional substance restrictions apply to this part number. No pin-compatible second source or official successor is listed in the manufacturer documentation. The part is single-sourced to Texas Instruments; for a BOM risk review, the functional replacement would require a different package or output type.