# LM224D

**Texas Instruments** · Operational Amplifier · SOIC-14

LM224D from Texas Instruments, in a SOIC-14. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | 1OUT | output | Output of the first operational amplifier |
| 2 | 1IN- | input | Inverting input of the first operational amplifier |
| 3 | 1IN+ | input | Non-inverting input of the first operational amplifier |
| 4 | VCC+ | power_in | Positive power supply voltage, operating range 3V to 26V for LM224 |
| 5 | 2IN+ | input | Non-inverting input of the second operational amplifier |
| 6 | 2IN- | input | Inverting input of the second operational amplifier |
| 7 | 2OUT | output | Output of the second operational amplifier |
| 8 | 3OUT | output | Output of the third operational amplifier |
| 9 | 3IN- | input | Inverting input of the third operational amplifier |
| 10 | 3IN+ | input | Non-inverting input of the third operational amplifier |
| 11 | VCC- | power_in | Negative power supply or ground for single-supply operation |
| 12 | 4IN+ | input | Non-inverting input of the fourth operational amplifier |
| 13 | 4IN- | input | Inverting input of the fourth operational amplifier |
| 14 | 4OUT | output | Output of the fourth operational amplifier |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-14 |
| Category | Amplifiers/Comparators |
| Pins | 14 |

## CAD (KiCad official)

- Symbol: `LM224D`
- Footprint: `Package_SO:SOIC-14_3.9x8.7mm_P1.27mm`
- 3D model: SOIC-14 (KiCad packages3D, STEP)
- 3D model files: `lm224d-etched.step` / `lm224d-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm224d.step` / `lm224d.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/lm224a) (65 pp, sha256 `f917efd84f8c9582`, retrieved 2026-10-03, 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:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-4-5-20251001` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/lm224d-datasheet.pdf)