# RS4G126XQ

**Jiangsu RUNIC Tech** · Buffers, Drivers, Receivers, Transceivers · TSSOP-14

RS4G126XQ from Jiangsu RUNIC Tech, in a TSSOP-14. 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 | 1OE | input | Output enable for buffer 1; when OE is low the buffer 1 output is disabled to the high-impedance state. |
| 2 | 1A | input | Input of buffer 1; inputs accept voltages up to 5.5V. |
| 3 | 1Y | output | Output of buffer 1, a 3-state output with ±24mA drive at VCC=3.0V. |
| 4 | 2OE | input | Output enable for buffer 2; when OE is low the buffer 2 output is disabled to the high-impedance state. |
| 5 | 2A | input | Input of buffer 2; inputs accept voltages up to 5.5V. |
| 6 | 2Y | output | Output of buffer 2, a 3-state output with ±24mA drive at VCC=3.0V. |
| 7 | GND | power_in | Ground reference for the device. |
| 8 | 3Y | output | Output of buffer 3, a 3-state output with ±24mA drive at VCC=3.0V. |
| 9 | 3A | input | Input of buffer 3; inputs accept voltages up to 5.5V. |
| 10 | 3OE | input | Output enable for buffer 3; when OE is low the buffer 3 output is disabled to the high-impedance state. |
| 11 | 4Y | output | Output of buffer 4, a 3-state output with ±24mA drive at VCC=3.0V. |
| 12 | 4A | input | Input of buffer 4; inputs accept voltages up to 5.5V. |
| 13 | 4OE | input | Output enable for buffer 4; when OE is low the buffer 4 output is disabled to the high-impedance state. |
| 14 | VCC | power_in | Power supply, operating range 1.65V to 5.5V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Jiangsu RUNIC Tech |
| Package | TSSOP-14 |
| Category | Logic |
| Pins | 14 |

## CAD (KiCad official)

- Symbol: `RS4G126XQ`
- Footprint: `Package_SO:TSSOP-14_4.4x5mm_P0.65mm`
- 3D model: TSSOP-14 (KiCad packages3D, STEP)
- 3D model files: `rs4g126xq-etched.step` / `rs4g126xq-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `rs4g126xq.step` / `rs4g126xq.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/8590922685062848512) (11 pp, sha256 `e70cb0bd13345ce6`, retrieved 2026-10-17, 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/rs4g126xq-datasheet.pdf)