# CD74HCT564M

**Texas Instruments** · Flip Flops · SOIC-20-300mil

CD74HCT564M 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 | OE | input | Active-low three-state output enable; a high level puts all Q outputs in high impedance regardless of other inputs. |
| 2 | D0 | input | Data input 0, inverted and transferred to Q0 on the positive clock edge. |
| 3 | D1 | input | Data input 1, inverted and transferred to Q1 on the positive clock edge. |
| 4 | D2 | input | Data input 2, inverted and transferred to Q2 on the positive clock edge. |
| 5 | D3 | input | Data input 3, inverted and transferred to Q3 on the positive clock edge. |
| 6 | D4 | input | Data input 4, inverted and transferred to Q4 on the positive clock edge. |
| 7 | D5 | input | Data input 5, inverted and transferred to Q5 on the positive clock edge. |
| 8 | D6 | input | Data input 6, inverted and transferred to Q6 on the positive clock edge. |
| 9 | D7 | input | Data input 7, inverted and transferred to Q7 on the positive clock edge. |
| 10 | GND | power_in | Ground supply pin. |
| 11 | CP | input | Clock pulse input, positive-edge triggered. |
| 12 | Q7 | tri_state | Inverted three-state bus-driver output 7 of the data input D7. |
| 13 | Q6 | tri_state | Inverted three-state bus-driver output 6 of the data input D6. |
| 14 | Q5 | tri_state | Inverted three-state bus-driver output 5 of the data input D5. |
| 15 | Q4 | tri_state | Inverted three-state bus-driver output 4 of the data input D4. |
| 16 | Q3 | tri_state | Inverted three-state bus-driver output 3 of the data input D3. |
| 17 | Q2 | tri_state | Inverted three-state bus-driver output 2 of the data input D2. |
| 18 | Q1 | tri_state | Inverted three-state bus-driver output 1 of the data input D1. |
| 19 | Q0 | tri_state | Inverted three-state bus-driver output 0 of the data input D0. |
| 20 | VCC | power_in | Positive supply; 4.5 V to 5.5 V for HCT types, with a 0.1 µF bypass capacitor recommended. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `CD74HCT564M`
- Footprint: `Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm`
- 3D model: SOIC-20-300mil (KiCad packages3D, STEP)
- 3D model files: `cd74hct564m-etched.step` / `cd74hct564m-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cd74hct564m.step` / `cd74hct564m.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/cd74hc564) (24 pp, sha256 `193165d7e9c18d0c`, retrieved 2026-10-11, 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-sonnet-5-5` (text+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/cd74hct564m-datasheet.pdf)