Digital temperature sensor with an I2C / SMBus interface in the industry-standard LM75 form factor and pinout, in a SOIC-8 package. A 12-bit ADC gives 0.0625 °C resolution with ±1 °C typical accuracy, and a programmable ALERT output flags over-temperature. Three address pins (A0-A2) allow up to eight sensors on one bus. The default board-temperature monitor; no external components beyond a bypass cap.

Pinout

Pin	Name	Type	Function
1	SDA	bidirectional	Serial data line for the I2C/SMBus/Two-Wire interface. Open-drain output; requires an external pull-up resistor (typ. 4.7 kΩ). VIH ≥ 0.7·V+, VIL ≤ 0.3·V+; VOL ≤ 0.4 V at IOL = 3 mA.
2	SCL	input	Serial clock line for the I2C/SMBus/Two-Wire interface. Open-drain; requires an external pull-up resistor (typ. 4.7 kΩ). Supports standard, fast, and high-speed modes up to 3.4 MHz.
3	ALERT	output	Overtemperature alert / SMBus Alert output. Open-drain; requires an external pull-up resistor. VOL ≤ 0.4 V at IOL = 4 mA. Asserted when the measured temperature crosses the programmed THIGH/TLOW thresholds per the configuration register.
4	GND	power_in	Device ground reference (0 V).
5	A2	input	I2C slave-address select bit 2. Tie to GND or V+ to set the corresponding address bit. May be left floating on the TMP75 for a third state, giving up to 8 selectable addresses.
6	A1	input	I2C slave-address select bit 1. Tie to GND or V+ to set the corresponding address bit. May be left floating on the TMP75 for a third state.
7	A0	input	I2C slave-address select bit 0. Tie to GND or V+ to set the corresponding address bit. May be left floating on the TMP75 for a third state.
8	V+	power_in	Positive supply voltage input, 2.7 V to 5.5 V (absolute max 6.5 V on TMP75). Quiescent current typically 50 µA active, 0.1 µA in shutdown. A 0.01 µF bypass capacitor to GND is recommended.

Key specifications

Parameter	Value
Type	Digital temperature sensor (I2C / SMBus)
Resolution	12-bit (0.0625 °C)
Accuracy	±1 °C typ
Interface	I2C / SMBus, address pins A0-A2
Alert	Programmable ALERT / OS output
Supply voltage	2.7-5.5 V
Form factor	LM75-compatible pinout
Package	SOIC-8
Body (L×W×H)	4.9 × 3.9 × 1.75 mm

Ordering variants

Same part, different packaging or reel option.

TMP75AID (SOIC-8, tube)
TMP75AIDR (SOIC-8, tape & reel)

CAD (KiCad official)

Symbol: Sensor_Temperature:TMP1075D (pin-identical to TMP75)
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOIC-8 (KiCad packages3D)

Provenance

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

Datasheet: Texas Instruments datasheet (35 pp, sha256 30ddeda575764440, retrieved 2026-08-17, tier: manufacturer)
Extractor: ds2sf (Claude) — every pin and dimension is cited to a datasheet page; refuses to fabricate.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF