# LM397MF

**Texas Instruments** · Comparators · SOT-23-5

LM397MF from Texas Instruments, in a SOT-23-5. 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 | VIN- | power_in | Inverting input for voltage comparison with input common-mode voltage range 0 V to VS - 1.5 V. |
| 2 | GND | power_in | Ground reference. |
| 3 | VIN+ | power_in | Noninverting input for voltage comparison with input common-mode voltage range 0 V to VS - 1.5 V. |
| 4 | OUTPUT | output | Open-collector output capable of sinking 6 to 13 mA with output low voltage of 180 to 400 mV at 25°C. |
| 5 | VS | power_in | Positive supply voltage with operating range 5 V to 30 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOT-23-5 |
| Category | Amplifiers/Comparators |
| Pins | 5 |

## CAD (KiCad official)

- Symbol: `LM397MF`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files: `lm397mf-etched.step` / `lm397mf-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm397mf.step` / `lm397mf.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/lm397) (19 pp, sha256 `5b18748a79fe7705`, retrieved 2026-10-03, 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/lm397mf-datasheet.pdf)