LM2903DT from STMicroelectronics, in a SO-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	OUT1	output	Open-collector output of comparator 1. Requires an external pull-up resistor to a positive supply. Sinks current when the non-inverting input is below the inverting input.
2	VCC	power_in	Positive supply voltage. Operating range 2 V to 36 V single supply, or ±1 V to ±18 V dual supply.
3	IN1+	input	Non-inverting input of comparator 1. Low input bias current (typ. 25 nA).
4	IN1-	input	Inverting input of comparator 1. Input common-mode range extends down to the negative supply (ground in single-supply operation).
5	IN2+	input	Non-inverting input of comparator 2. Low input bias current (typ. 25 nA).
6	IN2-	input	Inverting input of comparator 2. Input common-mode range extends down to the negative supply (ground in single-supply operation).
7	GND	power_in	Ground / negative supply pin. Connect to 0 V in single-supply operation or to V- in dual-supply operation.
8	OUT2	output	Open-collector output of comparator 2. Requires an external pull-up resistor to a positive supply. Sinks current when the non-inverting input is below the inverting input.

Key specifications

Parameter	Value
Manufacturer	STMicroelectronics
Package	SO-8
Category	Op-amp/Cmp
Pins	8

Ordering variants

Same part, different packaging or reel option.

LM2903DT
LM2903DTD
LM2903DTDR
LM2903DTST
LM2903DTN

CAD (KiCad official)

Symbol: LM2903DT
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SO-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`lm2903dt.step`	122 KB	You want the bare part, or you mark your own boards.
`lm2903dt-etched.step`	1.8 MB	You want the part with `LM2903DT` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 441 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: STMicroelectronics datasheet (19 pp, sha256 b7a4a6d1de452b65, 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