# CD74ACT245M

**Texas Instruments** · Latches · SOIC-20-300mil

CD74ACT245M 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 | DIR | input | Direction control input; when low selects B-to-A data transmission, when high selects A-to-B transmission |
| 2 | A0 | bidirectional | Bidirectional bus line on side A with three-state output capability; maximum ±24mA output drive |
| 3 | A1 | bidirectional | Bidirectional bus line on side A with three-state output capability; maximum ±24mA output drive |
| 4 | A2 | bidirectional | Bidirectional bus line on side A with three-state output capability; maximum ±24mA output drive |
| 5 | A3 | bidirectional | Bidirectional bus line on side A with three-state output capability; maximum ±24mA output drive |
| 6 | A4 | bidirectional | Bidirectional bus line on side A with three-state output capability; maximum ±24mA output drive |
| 7 | A5 | bidirectional | Bidirectional bus line on side A with three-state output capability; maximum ±24mA output drive |
| 8 | A6 | bidirectional | Bidirectional bus line on side A with three-state output capability; maximum ±24mA output drive |
| 9 | A7 | bidirectional | Bidirectional bus line on side A with three-state output capability; maximum ±24mA output drive |
| 10 | GND | power_in | Ground reference pin at 0V potential |
| 11 | B7 | bidirectional | Bidirectional bus line on side B with three-state output capability; maximum ±24mA output drive |
| 12 | B6 | bidirectional | Bidirectional bus line on side B with three-state output capability; maximum ±24mA output drive |
| 13 | B5 | bidirectional | Bidirectional bus line on side B with three-state output capability; maximum ±24mA output drive |
| 14 | B4 | bidirectional | Bidirectional bus line on side B with three-state output capability; maximum ±24mA output drive |
| 15 | B3 | bidirectional | Bidirectional bus line on side B with three-state output capability; maximum ±24mA output drive |
| 16 | B2 | bidirectional | Bidirectional bus line on side B with three-state output capability; maximum ±24mA output drive |
| 17 | B1 | bidirectional | Bidirectional bus line on side B with three-state output capability; maximum ±24mA output drive |
| 18 | B0 | bidirectional | Bidirectional bus line on side B with three-state output capability; maximum ±24mA output drive |
| 19 | OE | input | Output Enable control input (active low); when high places all output drivers in high-impedance state |
| 20 | VCC | power_in | Positive power supply pin for CD74ACT245; recommended operating voltage 4.5V to 5.5V |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `CD74ACT245M`
- Footprint: `Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm`
- 3D model: SOIC-20-300mil (KiCad packages3D, STEP)
- 3D model files: `cd74act245m-etched.step` / `cd74act245m-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cd74act245m.step` / `cd74act245m.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/cd74ac245) (28 pp, sha256 `c2afbf4b9cea018d`, 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/cd74act245m-datasheet.pdf)