# GT3140ADTR

**XBLW** · Operational Amplifier · SOP-8

GT3140ADTR from XBLW, in a SOP-8. 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 | OA1 | passive | Offset null terminal (OFFSET NULL) used to trim input offset voltage. |
| 2 | IN- | input | Inverting input of the operational amplifier. |
| 3 | IN+ | input | Non-inverting input of the operational amplifier. |
| 4 | V- | power_in | Negative power supply. |
| 5 | OA2 | passive | Offset null terminal (OFFSET NULL) used to trim input offset voltage. |
| 6 | OUT | output | Amplifier output. |
| 7 | V+ | power_in | Positive power supply. |
| 8 | ST | input | Strobe pin (labelled STROBE in the diagram). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | XBLW |
| Package | SOP-8 |
| Category | Amplifiers/Comparators |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `GT3140ADTR`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `gt3140adtr-etched.step` / `gt3140adtr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `gt3140adtr.step` / `gt3140adtr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [XBLW datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8563441595720245248) (8 pp, sha256 `bb8221296763c386`, retrieved 2026-10-20, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (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/gt3140adtr-datasheet.pdf)