LM2904MX 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	OUTA	output	Output of amplifier channel A. Class-AB output stage capable of sinking or sourcing current; short-circuit to GND is continuous for V+ ≤ 15 V (limited to ~40 mA).
2	-INA	input	Inverting input of amplifier channel A. High-impedance PNP input; input bias current typically 45 nA. Common-mode range includes ground (0 V to V+−1.5 V).
3	+INA	input	Non-inverting input of amplifier channel A. High-impedance PNP input; input common-mode range includes ground (0 V to V+−1.5 V).
4	GND/V-	power_in	Ground pin for single-supply operation, or the negative supply rail (V−) for split-supply operation. Split-supply range ±1.5 V to ±13 V for LM2904.
5	+INB	input	Non-inverting input of amplifier channel B. High-impedance PNP input; input common-mode range includes ground (0 V to V+−1.5 V). (Datasheet Pin Functions table labels this row 'Output, Channel B' but the pin diagram clearly shows pin 5 as +INB; treated as +INB.)
6	-INB	input	Inverting input of amplifier channel B. High-impedance PNP input; input bias current typically 45 nA.
7	OUTB	output	Output of amplifier channel B. Class-AB output stage capable of sinking or sourcing current; short-circuit to GND is continuous for V+ ≤ 15 V (limited to ~40 mA).
8	V+	power_in	Positive supply pin. Single-supply range 3 V to 26 V for LM2904 (LM158/LM258/LM358 up to 32 V). Supply current typically 1 mA total for both amplifiers.

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.

LM2904MX
LM2904MXM
LM2904MXDR
LM2904MXD
LM2904MXN
LM2904MXP
LM2904MXYPB

CAD (KiCad official)

Symbol: LM2904MX
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
`lm2904mx.step`	122 KB	You want the bare part, or you mark your own boards.
`lm2904mx-etched.step`	1.6 MB	You want the part with `LM2904MX` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 417 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 (38 pp, sha256 89107a55b932318a, 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