# RS8561XK

**Jiangsu RUNIC Tech** · Precision Op Amps · SOIC-8

RS8561XK from Jiangsu RUNIC Tech, in a SOIC-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 | NC | unconnected | No internal connection; the datasheet states this pin can be left floating. |
| 2 | -IN | input | Negative (inverting) input of the single amplifier; the datasheet's absolute maximum signal input range is (V-) - 0.5 V to (V+) + 0.5 V. |
| 3 | +IN | input | Positive (noninverting) input of the single amplifier; common-mode range is (V-) - 0.1 V to (V+) + 0.1 V. |
| 4 | V- | power_in | Negative (lowest) power supply; single supply operation is 2.9 V to 5.5 V referenced to V-. |
| 5 | NC | unconnected | No internal connection; the datasheet states this pin can be left floating. |
| 6 | OUT | output | Amplifier output, swinging rail-to-rail; absolute maximum output current is ±55 mA. |
| 7 | V+ | power_in | Positive (highest) power supply; the supply difference V+ - V- is 2.9 V to 5.5 V (absolute maximum 7.0 V). |
| 8 | NC | unconnected | No internal connection; the datasheet states this pin can be left floating. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Jiangsu RUNIC Tech |
| Package | SOIC-8 |
| Category | Amplifiers/Comparators |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `RS8561XK`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `rs8561xk-etched.step` / `rs8561xk-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `rs8561xk.step` / `rs8561xk.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Jiangsu RUNIC Tech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8602894899101003776) (24 pp, sha256 `d353109e1e2f3fd7`, retrieved 2026-10-10, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (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/rs8561xk-datasheet.pdf)