# SN74AHCT244DBR

**Texas Instruments** · Buffers, Drivers, Receivers, Transceivers · SSOP-20-208mil

SN74AHCT244DBR from Texas Instruments, in a SSOP-20-208mil. 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 input for driver 1 |
| 2 | 1A1 | input | Input 1A1 |
| 3 | 2Y4 | tri_state | Tri-state output 2Y4 |
| 4 | 1A2 | input | Input 1A2 |
| 5 | 2Y3 | tri_state | Tri-state output 2Y3 |
| 6 | 1A3 | input | Input 1A3 |
| 7 | 2Y2 | tri_state | Tri-state output 2Y2 |
| 8 | 1A4 | input | Input 1A4 |
| 9 | 2Y1 | tri_state | Tri-state output 2Y1 |
| 10 | GND | power_in | Ground pin |
| 11 | 2A1 | input | Input 2A1 |
| 12 | 1Y4 | tri_state | Tri-state output 1Y4 |
| 13 | 2A2 | input | Input 2A2 |
| 14 | 1Y3 | tri_state | Tri-state output 1Y3 |
| 15 | 2A3 | input | Input 2A3 |
| 16 | 1Y2 | tri_state | Tri-state output 1Y2 |
| 17 | 2A4 | input | Input 2A4 |
| 18 | 1Y1 | tri_state | Tri-state output 1Y1 |
| 19 | 2OE | input | Output enable input for driver 2 |
| 20 | VCC | power_out | Power supply pin |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SSOP-20-208mil |
| Category | Logic |
| Pins | 20 |

## CAD (KiCad official)

- Symbol: `SN74AHCT244DBR`
- Footprint: `Package_SO:SSOP-20_5.3x7.2mm_P0.65mm`
- 3D model: SSOP-20-208mil (KiCad packages3D, STEP)
- 3D model files: `sn74ahct244dbr-etched.step` / `sn74ahct244dbr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sn74ahct244dbr.step` / `sn74ahct244dbr.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/sn74ahct244) (42 pp, sha256 `2998c52d90c3b53b`, retrieved 2026-10-06, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-4-5-20251001` (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/sn74ahct244dbr-datasheet.pdf)