# LM339SR

**COSINE** · Comparators · SOP-14

LM339SR from COSINE, in a SOP-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 | OUT2 | output | Output of comparator 2, open-drain; connect to a load or pull-up resistor. |
| 2 | OUT1 | output | Output of comparator 1, open-drain; connect to a load or pull-up resistor. |
| 3 | +Vs | power_in | Positive power supply (2V to 36V single supply); place a 0.1µF bypass capacitor as close to the part as possible. |
| 4 | -IN1 | input | Inverting input of comparator 1; voltage range -Vs -0.3V to +Vs +0.3V. |
| 5 | +IN1 | input | Non-inverting input of comparator 1; same voltage range as -IN (-Vs -0.3V to +Vs +0.3V). |
| 6 | -IN2 | input | Inverting input of comparator 2; voltage range -Vs -0.3V to +Vs +0.3V. |
| 7 | +IN2 | input | Non-inverting input of comparator 2; same voltage range as -IN (-Vs -0.3V to +Vs +0.3V). |
| 8 | -IN3 | input | Inverting input of comparator 3; voltage range -Vs -0.3V to +Vs +0.3V. |
| 9 | +IN3 | input | Non-inverting input of comparator 3; same voltage range as -IN (-Vs -0.3V to +Vs +0.3V). |
| 10 | -IN4 | input | Inverting input of comparator 4; voltage range -Vs -0.3V to +Vs +0.3V. |
| 11 | +IN4 | input | Non-inverting input of comparator 4; same voltage range as -IN (-Vs -0.3V to +Vs +0.3V). |
| 12 | -Vs | power_in | Negative power supply or ground; if not grounded, bypass with a 0.1µF capacitor close to the part. |
| 13 | OUT4 | output | Output of comparator 4, open-drain; connect to a load or pull-up resistor. |
| 14 | OUT3 | output | Output of comparator 3, open-drain; connect to a load or pull-up resistor. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | COSINE |
| Package | SOP-14 |
| Category | Amplifiers/Comparators |
| Pins | 14 |

## CAD (KiCad official)

- Symbol: `LM339SR`
- Footprint: `Package_SO:SOIC-14_3.9x8.7mm_P1.27mm`
- 3D model: SOP-14 (KiCad packages3D, STEP)
- 3D model files: `lm339sr-etched.step` / `lm339sr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm339sr.step` / `lm339sr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [COSINE datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603352579254329344) (9 pp, sha256 `6a3fe0a3e7e8bccc`, retrieved 2026-10-09, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-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/lm339sr-datasheet.pdf)