LM2904A-SR from 3PEAK, 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 op-amp channel A. Rail-to-rail output stage; typical short-circuit current 30mA.
2	-IN_A	input	Inverting input of op-amp channel A. Input bias current typically 60pA; input common-mode range extends to V-.
3	+IN_A	input	Non-inverting input of op-amp channel A. Input common-mode voltage range includes ground (V-).
4	-VS	power_in	Negative supply rail (or GND in single-supply operation). Total supply voltage (+Vs)-(-Vs) 3V to 36V (40V absolute max).
5	+IN_B	input	Non-inverting input of op-amp channel B. Input common-mode voltage range includes ground (V-).
6	-IN_B	input	Inverting input of op-amp channel B. Input bias current typically 60pA.
7	OUT_B	output	Output of op-amp channel B. Rail-to-rail output stage; typical short-circuit current 30mA.
8	+VS	power_in	Positive supply rail. Supply range 3V to 36V (single or split). Absolute maximum total supply 40V.

Key specifications

Parameter	Value
Manufacturer	3PEAK
Package	SOIC-8
Category	Op-amp/Cmp
Pins	8

Ordering variants

Same part, different packaging or reel option.

LM2904A-SR
LM2904A-SRTSR
LM2904A-SRVR
LM2904A-SR (LM2902A-SR)
LM2904A-SRTR (LM2902A-TR)

CAD (KiCad official)

Symbol: LM2904A-SR
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
`lm2904a-sr.step`	122 KB	You want the bare part, or you mark your own boards.
`lm2904a-sr-etched.step`	2.0 MB	You want the part with `LM2904A-SR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 507 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: 3PEAK datasheet (14 pp, sha256 dcb73ef4df32ac65, 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