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)

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).

Datasheet PDF