# GS8631-TR

**Gainsil** · Low Noise Amplifiers (LNA) - RF · SOT-23-5

GS8631-TR from Gainsil, in a SOT-23-5. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | OUT | output | Op-amp output. Rail-to-rail output swing capable of driving 600 ohm loads; typical closed-loop output impedance 3 ohm and output current up to ~53 mA. |
| 2 | VSS | power_in | Negative supply / ground reference. Together with VDD forms the single-supply range of 2.1 V to 5.5 V (absolute max VDD-VSS = 7.5 V). |
| 3 | IN+ | input | Non-inverting analog input. Rail-to-rail common-mode range (typ -0.1 V to VDD+0.1 V); input bias current ~1 pA typ. |
| 4 | IN- | input | Inverting analog input. Rail-to-rail common-mode range (typ -0.1 V to VDD+0.1 V); input bias current ~1 pA typ. |
| 5 | VDD | power_in | Positive supply. Single-supply operation from +2.1 V to +5.5 V (absolute max VDD-VSS = 7.5 V). Quiescent current ~470 uA/amplifier at 5 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Gainsil |
| Package | SOT-23-5 |
| Category | RF And Wireless |
| Pins | 5 |

## Ordering variants

Same part, different packaging or reel option.

- `GS8631-TR`
- `GS8631-CR`
- `GS8631-SR`
- `GS8631NH-TR`
- `GS8631NL-TR`
- `GS8631NH-CR`
- `GS8631NL-CR`

## CAD (KiCad official)

- Symbol: `GS8631-TR`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files: `gs8631-tr-etched.step` / `gs8631-tr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `gs8631-tr.step` / `gs8631-tr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Gainsil datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588905367657467904) (19 pp, sha256 `c17e6fe6cae0310b`, retrieved 2026-08-17, tier: lcsc)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/gs8631-tr-datasheet.pdf)