# LM339AM

**Texas Instruments** · Comparators · SOIC-14

LM339AM 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 | OUTPUT2 | output | Comparator output for channel 2, compatible with TTL/CMOS logic. |
| 2 | OUTPUT1 | output | Comparator output for channel 1, compatible with TTL/CMOS logic. |
| 3 | V+ | power_in | Positive power supply voltage, 2 to 36 VDC for LM339. |
| 4 | INPUT1- | input | Inverting (negative) input terminal for channel 1 comparator. |
| 5 | INPUT1+ | input | Noninverting (positive) input terminal for channel 1 comparator, common-mode voltage range includes ground. |
| 6 | INPUT2- | input | Inverting (negative) input terminal for channel 2 comparator. |
| 7 | INPUT2+ | input | Noninverting (positive) input terminal for channel 2 comparator, common-mode voltage range includes ground. |
| 8 | INPUT3- | input | Inverting (negative) input terminal for channel 3 comparator. |
| 9 | INPUT3+ | input | Noninverting (positive) input terminal for channel 3 comparator, common-mode voltage range includes ground. |
| 10 | INPUT4- | input | Inverting (negative) input terminal for channel 4 comparator. |
| 11 | INPUT4+ | input | Noninverting (positive) input terminal for channel 4 comparator, common-mode voltage range includes ground. |
| 12 | GND | power_in | Ground connection, negative power supply or reference. |
| 13 | OUTPUT4 | output | Comparator output for channel 4, compatible with TTL/CMOS logic. |
| 14 | OUTPUT3 | output | Comparator output for channel 3, compatible with TTL/CMOS logic. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `LM339AM`
- Footprint: `Package_SO:SOIC-14_3.9x8.7mm_P1.27mm`
- 3D model: SOIC-14 (KiCad packages3D, STEP)
- 3D model files: `lm339am-etched.step` / `lm339am-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm339am.step` / `lm339am.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/ds/symlink/lm139-n.pdf) (33 pp, sha256 `34bad127017f9658`, retrieved 2026-10-05, tier: lcsc)
- **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/lm339am-datasheet.pdf)