# SN74S244DWR

**Texas Instruments** · Buffers, Drivers, Receivers, Transceivers · SOIC-20-300mil

SN74S244DWR from Texas Instruments, in a SOIC-20-300mil. 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 | 1G | input | Channel 1 output enable input for the 1Y outputs. |
| 2 | 1A1 | input | Channel 1, A side 1 data input. |
| 3 | 2Y4 | output | Channel 2, Y side 4 three-state output. |
| 4 | 1A2 | input | Channel 1, A side 2 data input. |
| 5 | 2Y3 | output | Channel 2, Y side 3 three-state output. |
| 6 | 1A3 | input | Channel 1, A side 3 data input. |
| 7 | 2Y2 | output | Channel 2, Y side 2 three-state output. |
| 8 | 1A4 | input | Channel 1, A side 4 data input. |
| 9 | 2Y1 | output | Channel 2, Y side 1 three-state output. |
| 10 | GND | power_in | Ground reference for the device. |
| 11 | 2A1 | input | Channel 2, A side 1 data input. |
| 12 | 1Y4 | output | Channel 1, Y side 4 three-state output. |
| 13 | 2A2 | input | Channel 2, A side 2 data input. |
| 14 | 1Y3 | output | Channel 1, Y side 3 three-state output. |
| 15 | 2A3 | input | Channel 2, A side 3 data input. |
| 16 | 1Y2 | output | Channel 1, Y side 2 three-state output. |
| 17 | 2A4 | input | Channel 2, A side 4 data input. |
| 18 | 1Y1 | output | Channel 1, Y side 1 three-state output. |
| 19 | 2G/2G | input | Channel 2 output enable input; the datasheet footnote specifies 2G (not 2G) for the SNx4S244 driver. |
| 20 | VCC | power_in | Power supply; recommended VCC is 4.75 V to 5.25 V for SN74xS24x with a 5 V nominal, and the absolute maximum supply voltage is 7 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-20-300mil |
| Category | Logic |
| Pins | 20 |

## CAD (KiCad official)

- Symbol: `SN74S244DWR`
- Footprint: `Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm`
- 3D model: SOIC-20-300mil (KiCad packages3D, STEP)
- 3D model files: `sn74s244dwr-etched.step` / `sn74s244dwr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sn74s244dwr.step` / `sn74s244dwr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/sn74ls241) (42 pp, sha256 `05f3258985319fe3`, retrieved 2026-10-12, 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/sn74s244dwr-datasheet.pdf)