LM2904MM from HGSEMI, in a MSOP-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	Op-amp 1 output. Class-AB output stage with internal short-circuit protection; typical short-circuit current ±24 mA. VOH ≈ VCC-1.5 V, VOL near VEE.
2	1IN-	input	Op-amp 1 inverting input. Typical input bias current 50 nA, input offset current 10 nA. Differential input voltage rating ±36 V.
3	1IN+	input	Op-amp 1 non-inverting input. Common-mode input voltage range extends from VEE to VCC-1.5 V (single-supply rail-to-rail on the negative rail).
4	VEE	power_in	Negative supply (or GND for single-supply operation). Range: 0 V (single-supply) or down to -18 V (dual-supply).
5	2IN+	input	Op-amp 2 non-inverting input. Common-mode input voltage range extends from VEE to VCC-1.5 V.
6	2IN-	input	Op-amp 2 inverting input. Typical input bias current 50 nA, input offset current 10 nA. Differential input voltage rating ±36 V.
7	2OUT	output	Op-amp 2 output. Class-AB output stage with internal short-circuit protection; typical short-circuit current ±24 mA.
8	VCC	power_in	Positive supply. Single-supply range 3 V to 36 V; dual-supply up to +18 V. Typical quiescent current 0.5 mA at VCC=5 V, 0.8 mA at VCC=36 V.

Key specifications

Parameter	Value
Manufacturer	HGSEMI
Package	MSOP-8
Category	Op-amp/Cmp
Pins	8

Ordering variants

Same part, different packaging or reel option.

LM2904MM/TR
LM2904MMN
LM2904MMM/TR
LM2904MMDQ2/TR
LM2904MMDQ3/TR

CAD (KiCad official)

Symbol: LM2904MM
Footprint: Package_SO:MSOP-8_3x3mm_P0.65mm
3D model: MSOP-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`lm2904mm.step`	123 KB	You want the bare part, or you mark your own boards.
`lm2904mm-etched.step`	1.6 MB	You want the part with `LM2904MM` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 419 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: HGSEMI datasheet (10 pp, sha256 25a7f8f07393d110, retrieved 2026-08-17, tier: lcsc)
Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
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