TMP102
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TI digital I2C temperature sensor, SOT-563. 12-bit, ±0.5 C, ALERT output, 4 addresses. Tiny + low power. Datasheet-verified.
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markdownTMP102
Texas Instruments · I2C digital temperature sensor · SOT-563
A tiny digital temperature sensor with an I2C interface, in a 6-pin SOT-563 barely larger than an 0805. It reports temperature as a 12-bit value (0.0625 C resolution) with plus/minus 0.5 C accuracy and no calibration, so it feeds a microcontroller directly over two wires. A programmable ALERT output flags an over/under-temperature threshold for thermostat-style control, and the ADD0 pin selects one of four I2C addresses so several share the bus. It sips power (a few microamps averaged) which suits battery designs. Runs 1.4-3.6 V.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | SCL | input | Serial clock input for the SMBus / two-wire / I2C interface. Requires an external pullup resistor (typ. 5 kΩ). Input high 0.7×V+ min, input low 0.3×V+ max; supports Fast mode (up to 400 kHz) and High-speed mode (up to 2.85 MHz). |
| 2 | GND | power_in | Ground reference for the device. Return path for supply and digital I/O. |
| 3 | ALERT | output | Overtemperature alert output. Open-drain, requires an external pullup resistor. VOL ≤ 0.4 V at IOL = 3 mA (V+ > 2 V). Voltage on ALERT must not exceed V+ + 0.3 V and ≤ 4 V. |
| 4 | ADD0 | input | Address-select input. Connect to GND, V+, SDA, or SCL to select one of four unique I2C slave addresses, allowing up to four TMP102 devices on the same bus. |
| 5 | V+ | power_in | Positive supply voltage input, 1.4 V to 3.6 V (3.3 V nominal). Typical quiescent current 7.5 µA (serial bus inactive). Bypass with a 0.01 µF capacitor to GND at the pin. |
| 6 | SDA | bidirectional | Serial data line for the SMBus / two-wire / I2C interface. Open-drain output; requires an external pullup resistor (typ. 5 kΩ). VOL ≤ 0.4 V at IOL = 3 mA (V+ > 2 V). |
Key specifications
| Parameter | Value |
|---|---|
| Type | I2C digital temperature sensor |
| Resolution | 12-bit (0.0625 °C) |
| Accuracy | ±0.5 °C (-25 to +85 °C) |
| Interface | I2C (SMBus), up to 3.4 MHz |
| Addresses | 4 (via ADD0 pin) |
| Alert | programmable ALERT output |
| Supply voltage | 1.4-3.6 V |
| Package | SOT-563 (6-pin) |
Ordering variants
Same part, different packaging or reel option.
TMP102AIDRLR (SOT-563)TMP102AIDRLT (SOT-563, small reel)
CAD (KiCad official)
- Symbol:
Sensor_Temperature:TMP102xxDRL - Footprint:
Package_TO_SOT_SMD:SOT-563 - 3D model: SOT-563 (KiCad packages3D)
- 3D model files:
tmp102-etched.step/tmp102-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);tmp102.step/tmp102.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (33 pp, sha256
c9da6620ef95f75c, 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).