component
TMP112
Public Made by Adomby adom
TI digital temperature sensor, I2C, SOT-563. +/-0.5 C accuracy, 12-bit, 1.4-3.6 V. Datasheet-verified.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownTMP112
Texas Instruments · Temperature sensor · SOT-563
Reports board or ambient temperature over I2C to +/-0.5 C without calibration, in a tiny SOT-563. Twelve-bit resolution gives 0.0625 C steps across -40 to 125 C, an ALERT output fires on programmable high/low limits for thermostat use, and an address pin (ADD0) allows up to four devices on one bus. It runs from 1.4 to 3.6 V at a few microamps, so it fits battery designs. A small, accurate alternative to a thermistor plus ADC.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | SCL | input | I2C/SMBus serial clock input. Open-drain bus line; requires an external pullup to V+. Voltage rating -0.5 V to 4 V. |
| 2 | GND | power_in | Device ground / negative supply reference. Note: pin 1 has curved edges in TMP112Dx packages (not applicable to SOT563). |
| 3 | ALERT | output | Overtemperature alert, open-drain output; requires an external pullup resistor. If unused, tie to GND (preferred). |
| 4 | ADD0 | input | I2C address-select input. Tie to V+, GND, SDA, or SCL to select one of four 7-bit slave addresses, allowing up to four TMP112 devices on one bus. |
| 5 | V+ | power_in | Positive supply input, 1.4 V to 3.6 V (3.3 V nominal). Absolute maximum 4 V. Typical quiescent current 3.2 uA. |
| 6 | SDA | bidirectional | I2C/SMBus serial data line. Open-drain output; requires an external pullup to V+. Voltage rating -0.5 V to 4 V. |
Key specifications
| Parameter | Value |
|---|---|
| Type | Digital temperature sensor |
| Interface | I2C / SMBus (4 addresses) |
| Accuracy | +/-0.5 C (max, -25 to 85 C) |
| Resolution | 12-bit (0.0625 C) |
| Range | -40 to 125 C |
| Alert | Programmable high/low limit output |
| Supply | 1.4-3.6 V |
| Package | SOT-563 |
Ordering variants
Same part, different packaging or reel option.
TMP112AIDRLR (SOT-563, +/-0.5 C)TMP112BIDRLR (wider range)TMP112NAIDRLR (relaxed accuracy)
CAD (KiCad official)
- Symbol:
Sensor_Temperature:TMP112xxDRL (KiCad official) - Footprint:
Package_TO_SOT_SMD:SOT-563 - 3D model: SOT-563 (KiCad packages3D, STEP)
- 3D model files:
tmp112-etched.step/tmp112-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);tmp112.step/tmp112.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (46 pp, sha256
5e9dc199169e25b3, retrieved 2026-08-17, tier: manufacturer) - Extractor:
ds2sf(Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate. - CAD: KiCad official libraries (CC-BY-SA 4.0).