# LM2904M

**HGSEMI** · Operational Amplifier · SOP-8

LM2904M from HGSEMI, in a SOP-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. Push-pull output with short-circuit protection; typical short-circuit current ±24 mA. Output swing on a 15 V single supply: VOH ~13.6 V (Iout=-50µA), VOL ~0.1 V (Iout=50µA). |
| 2 | 1IN- | input | Op-amp 1 inverting input. Common-mode input range VEE to VCC-1.5V; typical input bias current 50 nA and offset current 10 nA at VO=1.4 V. |
| 3 | 1IN+ | input | Op-amp 1 non-inverting input. Common-mode input range VEE to VCC-1.5V; ±36 V max differential input voltage between IN+ and IN-. |
| 4 | VEE | power_in | Negative supply / ground. Tie to GND for single-supply operation (3V-36V VCC) or to a negative rail for split-supply operation up to ±18 V. |
| 5 | 2IN+ | input | Op-amp 2 non-inverting input. Same electrical characteristics as 1IN+: common-mode range VEE to VCC-1.5V, ±36 V differential limit. |
| 6 | 2IN- | input | Op-amp 2 inverting input. Typical input bias current 50 nA, offset current 10 nA at VO=1.4 V. |
| 7 | 2OUT | output | Op-amp 2 output. Push-pull output with short-circuit protection; typical short-circuit current ±24 mA. Same output swing characteristics as 1OUT. |
| 8 | VCC | power_in | Positive supply. Single-supply range 3V-36V (VEE=GND) or ±18 V split supply. Typical quiescent current 0.5 mA @ VCC=5V, 0.8 mA @ VCC=36V (no load). |

## Key specifications

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

## Ordering variants

Same part, different packaging or reel option.

- `LM2904MM/TR`
- `LM2904MN`
- `LM2904MMM/TR`
- `LM2904MDQ2/TR`
- `LM2904MDQ3/TR`

## CAD (KiCad official)

- Symbol: `LM2904M`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `lm2904m-etched.step` / `lm2904m-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm2904m.step` / `lm2904m.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [HGSEMI datasheet](docs/lm2904m-datasheet.pdf) (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](docs/lm2904m-datasheet.pdf)