# LM258QT

**STMicroelectronics** · Operational Amplifier · DFN-8-EP(2x2)

LM258QT from STMicroelectronics, in a DFN-8-EP(2x2). 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 | Out1 | output | Output of amplifier 1, which can swing from 0 V to (VCC+ - 1.5 V). |
| 2 | In1- | input | Inverting input of amplifier 1, with input voltage range -0.3 V to 32 V. |
| 3 | In1+ | input | Non-inverting input of amplifier 1, with common-mode range from VCC- to (VCC+ - 1.5 V) at 25 °C. |
| 4 | Vcc- | power_in | Negative supply or ground for single-supply operation. |
| 5 | In2+ | input | Non-inverting input of amplifier 2, with common-mode range from VCC- to (VCC+ - 1.5 V) at 25 °C. |
| 6 | In2- | input | Inverting input of amplifier 2, with input voltage range -0.3 V to 32 V. |
| 7 | Out2 | output | Output of amplifier 2, which can swing from 0 V to (VCC+ - 1.5 V). |
| 8 | Vcc+ | power_in | Positive supply, operating range 3 V to 30 V. |
| 9 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | DFN-8-EP(2x2) |
| Category | Amplifiers/Comparators |
| Pins | 9 |

## CAD (KiCad official)

- Symbol: `LM258QT`
- Footprint: `Package_DFN_QFN:DFN-8-1EP_2x2mm_P0.5mm_EP0.6x1.2mm`
- 3D model: DFN-8-EP(2x2) (KiCad packages3D, STEP)
- 3D model files: `lm258qt-etched.step` / `lm258qt-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm258qt.step` / `lm258qt.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [STMicroelectronics datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588942506066628608) (25 pp, sha256 `40a2550bed90848d`, retrieved 2026-10-03, 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/lm258qt-datasheet.pdf)