# CD74AC74M

**Texas Instruments** · Flip Flops · SOIC-14

CD74AC74M from Texas Instruments, in a SOIC-14. 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 | 1CLR | input | Channel 1 Clear Input, active low. |
| 2 | 1D | input | Channel 1 Data Input. |
| 3 | 1CLK | input | Channel 1 Positive edge triggered clock input. |
| 4 | 1PRE | input | Channel 1 Preset Input, active low. |
| 5 | 1Q | output | Channel 1 Output. |
| 6 | 1Q̄ | output | Channel 1 Inverted Output. |
| 7 | GND | power_in | Ground. |
| 8 | 2Q̄ | output | Channel 2 Inverted Output. |
| 9 | 2Q | output | Channel 2 Output. |
| 10 | 2PRE | input | Channel 2 Preset Input, active low. |
| 11 | 2CLK | input | Channel 2 Positive edge triggered clock input. |
| 12 | 2D | input | Channel 2 Data Input. |
| 13 | 2CLR | input | Channel 2 Clear Input, active low. |
| 14 | VCC | power_in | Positive Supply. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-14 |
| Category | Logic |
| Pins | 14 |

## CAD (KiCad official)

- Symbol: `CD74AC74M`
- Footprint: `Package_SO:SOIC-14_3.9x8.7mm_P1.27mm`
- 3D model: SOIC-14 (KiCad packages3D, STEP)
- 3D model files: `cd74ac74m-etched.step` / `cd74ac74m-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cd74ac74m.step` / `cd74ac74m.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/cd74ac74) (24 pp, sha256 `128e3d2733904e14`, 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/cd74ac74m-datasheet.pdf)