TMP275AIDR from Texas Instruments, in a SOIC-8. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	SDA	bidirectional	I2C/SMBus serial data. Open-drain bidirectional line; requires an external pullup resistor (typ. 5 kΩ) to V+. VOL = 0.15 V typ at IOL = 3 mA.
2	SCL	input	I2C/SMBus serial clock input. Open-drain; requires an external pullup resistor to V+. Supports Fast (400 kHz) and High-Speed (up to 2.38 MHz) modes.
3	ALERT	output	Overtemperature alert output. Open-drain; requires an external pullup resistor. VOL = 0.15 V typ at IOL = 4 mA. Asserts when the measured temperature exceeds the programmed limit per the SMBus alert function.
4	GND	power_in	Device ground return.
5	A2	input	I2C address select bit 2. Connect to GND or V+ to set one of the eight possible slave addresses.
6	A1	input	I2C address select bit 1. Connect to GND or V+ to set one of the eight possible slave addresses.
7	A0	input	I2C address select bit 0. Connect to GND or V+ to set one of the eight possible slave addresses.
8	V+	power_in	Positive supply, 2.7 V to 5.5 V (7 V absolute max). Bypass with a 0.01 µF (or larger) ceramic capacitor to GND close to the pin. Typical IQ = 50 µA (bus inactive).

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	SOIC-8
Category	Sensor
Pins	8

Ordering variants

Same part, different packaging or reel option.

TMP275AIDR
TMP275AIDRAIDGKR
TMP275AIDRAIDGKT

CAD (KiCad official)

Symbol: TMP275AIDR
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOIC-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`tmp275aidr.step`	122 KB	You want the bare part, or you mark your own boards.
`tmp275aidr-etched.step`	1.8 MB	You want the part with `TMP275AIDR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 459 faces against 147 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: Texas Instruments datasheet (34 pp, sha256 dc06223f8413fc81, 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