LM75AD from NXP Semicon 118, 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-bus serial bidirectional data line; open-drain. Requires an external pull-up (~10 kΩ) to VCC if the bus does not already provide one. Must not be left floating.
2	SCL	input	I2C-bus serial clock input, driven by the bus master. Requires an external pull-up (~10 kΩ) to VCC if the bus does not already provide one. Must not be left floating.
3	OS	output	Overtemperature Shutdown output; open-drain. Asserts when Temp exceeds the programmed Tos limit (comparator or interrupt mode selectable). Needs an external pull-up as large as possible, up to 200 kΩ, to minimize self-heating error.
4	GND	power_in	Ground reference. Connect to system ground.
5	A2	input	User-defined I2C slave address bit 2. Tie to GND for logic 0 or VCC for logic 1; must not be left floating (not internally biased).
6	A1	input	User-defined I2C slave address bit 1. Tie to GND for logic 0 or VCC for logic 1; must not be left floating (not internally biased).
7	A0	input	User-defined I2C slave address bit 0. Tie to GND for logic 0 or VCC for logic 1; must not be left floating (not internally biased).
8	VCC	power_in	Positive power supply, 2.8 V to 5.5 V. Bypass to GND with a local decoupling capacitor.

Key specifications

Parameter	Value
Manufacturer	NXP Semicon 118
Package	SOIC-8
Category	Sensor
Pins	8

Ordering variants

Same part, different packaging or reel option.

LM75AD
LM75ADP

CAD (KiCad official)

Symbol: LM75AD
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
`lm75ad.step`	122 KB	You want the bare part, or you mark your own boards.
`lm75ad-etched.step`	1.1 MB	You want the part with `LM75AD` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 297 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: NXP Semicon 118 datasheet (24 pp, sha256 fc76b747cd9e78c4, 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