LM2904DR from UMW, 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	OUT_A	output	Output of amplifier A. Push-pull output stage; can source ~40 mA and sink ~20 mA typical (short-circuit current typically ±40 mA at VS=10 V).
2	IN-_A	input	Inverting input of amplifier A. Input bias current typ -20 nA, input offset current typ 2 nA.
3	IN+_A	input	Non-inverting input of amplifier A. Common-mode input range: (V-) to (V+)-1.5 V.
4	GND	power_in	Negative supply / ground (V-). Connect to 0 V for single-supply operation, or to negative rail (down to -13 V) for dual-supply operation.
5	IN+_B	input	Non-inverting input of amplifier B. Common-mode input range: (V-) to (V+)-1.5 V.
6	IN-_B	input	Inverting input of amplifier B. Input bias current typ -20 nA, input offset current typ 2 nA.
7	OUT_B	output	Output of amplifier B. Push-pull output stage; can source ~40 mA and sink ~20 mA typical (short-circuit current typically ±40 mA at VS=10 V).
8	V+	power_in	Positive supply. Single-supply operation 3 V to 26 V, or dual-supply up to ±13 V. Quiescent current typ 350 uA per amplifier at VO=2.5 V.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

LM2904DR
LM2904DRPWR

CAD (KiCad official)

Symbol: LM2904DR
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
`lm2904dr.step`	122 KB	You want the bare part, or you mark your own boards.
`lm2904dr-etched.step`	1.8 MB	You want the part with `LM2904DR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 443 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: UMW datasheet (9 pp, sha256 5aeaa330435e1281, retrieved 2026-08-17, tier: lcsc)
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