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RS521XF
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Jiangsu RUNIC Tech Operational Amplifier, SOT-23-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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RS521XF
Jiangsu RUNIC Tech · Operational Amplifier · SOT-23-5
RS521XF 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 with rail-to-rail swing (within 7mV of the rail at RL=10kΩ) and short-circuit current of 80mA typical. |
| 2 | V- | power_in | Negative supply or ground; total supply V+ to V- is 2.5V to 5.5V, with 7.0V absolute maximum. |
| 3 | +IN | input | Non-inverting input with rail-to-rail common-mode range of -0.1V to 5.6V at Vs=5.5V, and input voltage limited to -0.5V to (V+)+0.5V. |
| 4 | -IN | input | Inverting input with rail-to-rail common-mode range of -0.1V to 5.6V at Vs=5.5V, and input voltage limited to -0.5V to (V+)+0.5V. |
| 5 | V+ | power_in | Positive supply, 2.5V to 5.5V relative to V- (7.0V absolute maximum), with a 0.1uF capacitor recommended close across the supply pins. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Jiangsu RUNIC Tech |
| Package | SOT-23-5 |
| Category | Amplifiers/Comparators |
| Pins | 5 |
CAD (KiCad official)
- Symbol:
RS521XF - Footprint:
Package_TO_SOT_SMD:SOT-23-5 - 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files:
rs521xf-etched.step/rs521xf-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);rs521xf.step/rs521xf.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Jiangsu RUNIC Tech datasheet (14 pp, sha256
c8e86d17f4ba6f0a, retrieved 2026-10-17, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-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).
# RS521XF
**Jiangsu RUNIC Tech** · Operational Amplifier · SOT-23-5
RS521XF 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 with rail-to-rail swing (within 7mV of the rail at RL=10kΩ) and short-circuit current of 80mA typical. |
| 2 | V- | power_in | Negative supply or ground; total supply V+ to V- is 2.5V to 5.5V, with 7.0V absolute maximum. |
| 3 | +IN | input | Non-inverting input with rail-to-rail common-mode range of -0.1V to 5.6V at Vs=5.5V, and input voltage limited to -0.5V to (V+)+0.5V. |
| 4 | -IN | input | Inverting input with rail-to-rail common-mode range of -0.1V to 5.6V at Vs=5.5V, and input voltage limited to -0.5V to (V+)+0.5V. |
| 5 | V+ | power_in | Positive supply, 2.5V to 5.5V relative to V- (7.0V absolute maximum), with a 0.1uF capacitor recommended close across the supply pins. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Jiangsu RUNIC Tech |
| Package | SOT-23-5 |
| Category | Amplifiers/Comparators |
| Pins | 5 |
## CAD (KiCad official)
- Symbol: `RS521XF`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files: `rs521xf-etched.step` / `rs521xf-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `rs521xf.step` / `rs521xf.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/8588881257006837760) (14 pp, sha256 `c8e86d17f4ba6f0a`, retrieved 2026-10-17, 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/rs521xf-datasheet.pdf)