LM2903AVQDRQ1 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	1OUT	output	Open-collector output of comparator 1. Requires an external pull-up resistor to a positive supply (typically 3 V to 36 V). Can sink >6 mA; may be wire-OR'd with 2OUT.
2	1IN-	input	Inverting input of comparator 1. Common-mode input range includes ground (V- to V+ - 1.5 V). Differential input voltage rated to the supply voltage.
3	1IN+	input	Non-inverting input of comparator 1. Common-mode input range includes ground (V- to V+ - 1.5 V).
4	GND	power_in	Ground / negative supply pin (V-). Connect to system ground for single-supply operation, or to the negative rail for split-supply (±1.5 V to ±18 V) operation.
5	2IN+	input	Non-inverting input of comparator 2. Common-mode input range includes ground (V- to V+ - 1.5 V).
6	2IN-	input	Inverting input of comparator 2. Common-mode input range includes ground (V- to V+ - 1.5 V).
7	2OUT	output	Open-collector output of comparator 2. Requires an external pull-up resistor to a positive supply. Can sink >6 mA; may be wire-OR'd with 1OUT.
8	VCC	power_in	Positive supply pin (V+). Single-supply operation: 3 V to 36 V. Split-supply operation: +1.5 V to +18 V. Absolute maximum 36 V single or ±18 V split.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	SOIC-8
Category	Op-amp/Cmp
Pins	8

Ordering variants

Same part, different packaging or reel option.

LM2903AVQDRQ1
LM2903AVQDRQ1DGK
LM2903AVQDRQ1DGKR

CAD (KiCad official)

Symbol: LM2903AVQDRQ1
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
`lm2903avqdrq1.step`	122 KB	You want the bare part, or you mark your own boards.
`lm2903avqdrq1-etched.step`	2.6 MB	You want the part with `LM2903AVQDRQ1` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 632 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 (21 pp, sha256 b0fe02e974eddf25, 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