# SN74HC245DTR

**XBLW** · Buffers, Drivers, Receivers, Transceivers · SOP-20

SN74HC245DTR from XBLW, in a SOP-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 | DIR | input | Direction control input that sets the transfer direction between the A and B buses. |
| 2 | A0 | bidirectional | Data input/output A0. |
| 3 | A1 | bidirectional | Data input/output A1. |
| 4 | A2 | bidirectional | Data input/output A2. |
| 5 | A3 | bidirectional | Data input/output A3. |
| 6 | A4 | bidirectional | Data input/output A4. |
| 7 | A5 | bidirectional | Data input/output A5. |
| 8 | A6 | bidirectional | Data input/output A6. |
| 9 | A7 | bidirectional | Data input/output A7. |
| 10 | GND | power_in | Ground (0 V). |
| 11 | B7 | bidirectional | Data input/output B7. |
| 12 | B6 | bidirectional | Data input/output B6. |
| 13 | B5 | bidirectional | Data input/output B5. |
| 14 | B4 | bidirectional | Data input/output B4. |
| 15 | B3 | bidirectional | Data input/output B3. |
| 16 | B2 | bidirectional | Data input/output B2. |
| 17 | B1 | bidirectional | Data input/output B1. |
| 18 | B0 | bidirectional | Data input/output B0. |
| 19 | OE | input | Output enable input, active LOW; a HIGH puts the outputs in the high-impedance OFF-state. |
| 20 | VCC | power_in | Supply voltage. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | XBLW |
| Package | SOP-20 |
| Category | Logic |
| Pins | 20 |

## CAD (KiCad official)

- Symbol: `SN74HC245DTR`
- Footprint: `Package_SO:SOP-20_7.5x12.8mm_P1.27mm`
- 3D model: SOP-20 (KiCad packages3D, STEP)
- 3D model files: `sn74hc245dtr-etched.step` / `sn74hc245dtr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sn74hc245dtr.step` / `sn74hc245dtr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [XBLW datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590906026915291136) (16 pp, sha256 `4cb6b08ab9ecf30c`, retrieved 2026-10-09, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (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/sn74hc245dtr-datasheet.pdf)