# LMH6639MFX

**Texas Instruments** · Operational Amplifier · SOT-23-6

LMH6639MFX from Texas Instruments, in a SOT-23-6. 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 | OUTPUT | output | Rail-to-rail amplifier output swinging to within 30mV of either supply rail with 110mA linear output current. |
| 2 | V- | power_in | Negative supply; the input common mode range extends to 0.2V below V-. |
| 3 | +IN | input | Non-inverting input; common mode range is -0.2V to within 1V of V+ (-0.2V to 4V at 5V supply). |
| 4 | -IN | input | Inverting input, protected by two anti-parallel diodes and a series resistor across the inputs. |
| 5 | SD | input | Shutdown control input; the device shuts down below a threshold of about V+ - 1.67V (supply current 400µA off mode at 5V). |
| 6 | V+ | power_in | Positive supply; fully characterized for 3V, 5V and ±5V operation. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOT-23-6 |
| Category | Amplifiers/Comparators |
| Pins | 6 |

## CAD (KiCad official)

- Symbol: `LMH6639MFX`
- Footprint: `Package_TO_SOT_SMD:SOT-23-6`
- 3D model: SOT-23-6 (KiCad packages3D, STEP)
- 3D model files: `lmh6639mfx-etched.step` / `lmh6639mfx-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lmh6639mfx.step` / `lmh6639mfx.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/lmh6639) (31 pp, sha256 `4a207dd200b5ba45`, retrieved 2026-10-11, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (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/lmh6639mfx-datasheet.pdf)