# STG3682QTR

**STMicroelectronics** · Analog Switches, Multiplexers · QFN-10(1.8x1.4)

STG3682QTR from STMicroelectronics, in a QFN-10(1.8x1.4). 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 | 1S1 | bidirectional | Independent switch terminal of pair 1; connects to common D1 when SEL1 is high via ON-resistance of 4.6Ω at VCC=4.3V. |
| 2 | D1 | bidirectional | Common terminal for switch pair 1; routes to 1S1 when SEL1 is high or to 1S2 when SEL1 is low. |
| 3 | 1S2 | bidirectional | Independent switch terminal of pair 1; connects to common D1 when SEL1 is low via ON-resistance of 4.6Ω at VCC=4.3V. |
| 4 | SEL2 | input | Digital control input for switch pair 2; high selects 2S1 (S1 ON), low selects 2S2 (S2 ON). |
| 5 | GND | power_in | Ground (0V) reference. |
| 6 | 2S1 | bidirectional | Independent switch terminal of pair 2; connects to common D2 when SEL2 is high via ON-resistance of 4.6Ω at VCC=4.3V. |
| 7 | D2 | bidirectional | Common terminal for switch pair 2; routes to 2S1 when SEL2 is high or to 2S2 when SEL2 is low. |
| 8 | 2S2 | bidirectional | Independent switch terminal of pair 2; connects to common D2 when SEL2 is low via ON-resistance of 4.6Ω at VCC=4.3V. |
| 9 | VCC | power_in | Positive supply voltage; operating range 1.65V to 4.3V single supply. |
| 10 | SEL1 | input | Digital control input for switch pair 1; high selects 1S1 (S1 ON), low selects 1S2 (S2 ON). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | QFN-10(1.8x1.4) |
| Category | Interface |
| Pins | 10 |

## CAD (KiCad official)

- Symbol: `STG3682QTR`
- Footprint: `Package_DFN_QFN:UQFN-10_1.4x1.8mm_P0.4mm`
- 3D model: QFN-10(1.8x1.4) (KiCad packages3D, STEP)
- 3D model files: `stg3682qtr-etched.step` / `stg3682qtr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `stg3682qtr.step` / `stg3682qtr.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/8588937799831859200) (19 pp, sha256 `2f05f621bfdc8ce2`, retrieved 2026-10-05, 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/stg3682qtr-datasheet.pdf)