# GS8621-TR

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

GS8621-TR from Gainsil, 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 | OUT | output | Amplifier output with rail-to-rail swing, able to drive heavy loads (53 mA typical output current at 5V). |
| 2 | VSS | power_in | Negative supply pin, connected to ground in single-supply operation; the supply range VDD to VSS is 2.1V to 5.5V. |
| 3 | IN+ | input | Non-inverting input with rail-to-rail common-mode range (VSS-0.1V to VDD+0.1V) and an absolute maximum input voltage of VSS-0.5V to VDD+0.5V. |
| 4 | IN- | input | Inverting input with rail-to-rail common-mode range (VSS-0.1V to VDD+0.1V) and an absolute maximum input voltage of VSS-0.5V to VDD+0.5V. |
| 5 | VDD | power_in | Positive supply pin, operating from 2.1V to 5.5V (absolute maximum 7.5V relative to VSS), with a 0.1uF ceramic bypass capacitor placed close to it. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Gainsil |
| Package | SOT-23-5 |
| Category | Radio Frequency Chip/Antenna |
| Pins | 5 |

## CAD (KiCad official)

- Symbol: `GS8621-TR`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files: `gs8621-tr-etched.step` / `gs8621-tr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `gs8621-tr.step` / `gs8621-tr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Gainsil datasheet](docs/gs8621-tr-datasheet.pdf) (16 pp, sha256 `f739b502fd0a83ff`, retrieved 2026-10-27, 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/gs8621-tr-datasheet.pdf)