# SN74LV244APWT

**Texas Instruments** · Buffers, Drivers, Receivers, Transceivers · TSSOP-20

SN74LV244APWT from Texas Instruments, in a TSSOP-20. 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 group 1; transfers data when LOW, places outputs in high impedance when HIGH |
| 2 | 1A1 | input | Input to first buffer of group 1 |
| 3 | 2Y4 | output | Output from fourth buffer of group 2 |
| 4 | 1A2 | input | Input to second buffer of group 1 |
| 5 | 2Y3 | output | Output from third buffer of group 2 |
| 6 | 1A3 | input | Input to third buffer of group 1 |
| 7 | 2Y2 | output | Output from second buffer of group 2 |
| 8 | 1A4 | input | Input to fourth buffer of group 1 |
| 9 | 2Y1 | output | Output from first buffer of group 2 |
| 10 | GND | power_in | Ground connection |
| 11 | 2A1 | input | Input to first buffer of group 2 |
| 12 | 1Y4 | output | Output from fourth buffer of group 1 |
| 13 | 2A2 | input | Input to second buffer of group 2 |
| 14 | 1Y3 | output | Output from third buffer of group 1 |
| 15 | 2A3 | input | Input to third buffer of group 2 |
| 16 | 1Y2 | output | Output from second buffer of group 1 |
| 17 | 2A4 | input | Input to fourth buffer of group 2 |
| 18 | 1Y1 | output | Output from first buffer of group 1 |
| 19 | 2OE | input | Output enable input for group 2; transfers data when LOW, places outputs in high impedance when HIGH |
| 20 | VCC | power_in | Positive power supply voltage |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | TSSOP-20 |
| Category | Logic |
| Pins | 20 |

## CAD (KiCad official)

- Symbol: `SN74LV244APWT`
- Footprint: `Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm`
- 3D model: TSSOP-20 (KiCad packages3D, STEP)
- 3D model files: `sn74lv244apwt-etched.step` / `sn74lv244apwt-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sn74lv244apwt.step` / `sn74lv244apwt.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/sn74lv244a) (39 pp, sha256 `d415bed908dc6f14`, retrieved 2026-10-07, 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/sn74lv244apwt-datasheet.pdf)