# RS721XF

**Jiangsu RUNIC Tech** · Operational Amplifier · SOT-23-5

RS721XF from Jiangsu RUNIC Tech, 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; absolute maximum output current is ±100 mA, output short-circuit is continuous (one amplifier per package to ground), and outputs are diode-clamped to the supply rails. |
| 2 | V- | power_in | Negative (lowest) power supply; single-supply operation spans 2.5 V to 5.5 V between V+ and V-, and the absolute maximum supply voltage is 7 V. |
| 3 | +IN | input | Positive (noninverting) input; common-mode range is -0.1 V to 5.6 V at Vs = 5.5 V, and the signal input is absolute-maximum limited to (V-) - 0.5 V to (V+) + 0.5 V with ±10 mA current limit. |
| 4 | -IN | input | Negative (inverting) input; common-mode range is -0.1 V to 5.6 V at Vs = 5.5 V, and the signal input is absolute-maximum limited to (V-) - 0.5 V to (V+) + 0.5 V with ±10 mA current limit. |
| 5 | V+ | power_in | Positive (highest) power supply; single-supply operation spans 2.5 V to 5.5 V above V-, and the absolute maximum supply voltage is 7 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Jiangsu RUNIC Tech |
| Package | SOT-23-5 |
| Category | Amplifiers/Comparators |
| Pins | 5 |

## CAD (KiCad official)

- Symbol: `RS721XF`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files: `rs721xf-etched.step` / `rs721xf-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `rs721xf.step` / `rs721xf.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/8588893630291988480) (28 pp, sha256 `ffb9f3cbf70e3064`, retrieved 2026-10-09, 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/rs721xf-datasheet.pdf)