# GS4558-SR

**Gainsil** · Operational Amplifier · SOP-8

GS4558-SR from Gainsil, in a SOP-8. 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 | OUTPUT 1 | output | Output of amplifier 1. Typical output resistance 45Ω; short-circuit sink/source currents ~60mA/35mA. |
| 2 | INPUT 1- | input | Inverting input of amplifier 1. High input impedance (~0.5MΩ); input bias current typically 70nA. |
| 3 | INPUT 1+ | input | Non-inverting input of amplifier 1. Common-mode input voltage range typically ±12V at ±15V supply. |
| 4 | VEE | power_in | Negative supply rail. Recommended −2V to −18V; absolute maximum −20V. |
| 5 | INPUT 2+ | input | Non-inverting input of amplifier 2. Common-mode input voltage range typically ±12V at ±15V supply. |
| 6 | INPUT 2- | input | Inverting input of amplifier 2. High input impedance (~0.5MΩ); input bias current typically 70nA. |
| 7 | OUTPUT 2 | output | Output of amplifier 2. Typical output resistance 45Ω; short-circuit sink/source currents ~60mA/35mA. |
| 8 | VCC | power_in | Positive supply rail. Recommended +2V to +18V; absolute maximum +20V. Total supply current typically 2.5mA (all amplifiers, no load). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Gainsil |
| Package | SOP-8 |
| Category | Op-amp/Cmp |
| Pins | 8 |

## Ordering variants

Same part, different packaging or reel option.

- `GS4558-SR`
- `GS4558-SRDR`

## CAD (KiCad official)

- Symbol: `GS4558-SR`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `gs4558-sr-etched.step` / `gs4558-sr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `gs4558-sr.step` / `gs4558-sr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Gainsil datasheet](docs/gs4558-sr-datasheet.pdf) (8 pp, sha256 `9826cd232540cb3a`, 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/gs4558-sr-datasheet.pdf)