# CY74FCT541CTSOCT

**Texas Instruments** · Buffers, Drivers, Receivers, Transceivers · SOIC-20-300mil

CY74FCT541CTSOCT 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 | OEA | input | Output Enable A input; active low to enable 3-state outputs |
| 2 | D0 | input | Data input 0 |
| 3 | D1 | input | Data input 1 |
| 4 | D2 | input | Data input 2 |
| 5 | D3 | input | Data input 3 |
| 6 | D4 | input | Data input 4 |
| 7 | D5 | input | Data input 5 |
| 8 | D6 | input | Data input 6 |
| 9 | D7 | input | Data input 7 |
| 10 | GND | power_in | Ground |
| 11 | O7 | tri_state | Data output 7; 3-state output with 64 mA sink, 32 mA source current capability |
| 12 | O6 | tri_state | Data output 6; 3-state output with 64 mA sink, 32 mA source current capability |
| 13 | O5 | tri_state | Data output 5; 3-state output with 64 mA sink, 32 mA source current capability |
| 14 | O4 | tri_state | Data output 4; 3-state output with 64 mA sink, 32 mA source current capability |
| 15 | O3 | tri_state | Data output 3; 3-state output with 64 mA sink, 32 mA source current capability |
| 16 | O2 | tri_state | Data output 2; 3-state output with 64 mA sink, 32 mA source current capability |
| 17 | O1 | tri_state | Data output 1; 3-state output with 64 mA sink, 32 mA source current capability |
| 18 | O0 | tri_state | Data output 0; 3-state output with 64 mA sink, 32 mA source current capability |
| 19 | OEB | input | Output Enable B input; active low to enable 3-state outputs |
| 20 | VCC | power_in | Positive power supply; 4.75 V to 5.25 V recommended |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `CY74FCT541CTSOCT`
- Footprint: `Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm`
- 3D model: SOIC-20-300mil (KiCad packages3D, STEP)
- 3D model files: `cy74fct541ctsoct-etched.step` / `cy74fct541ctsoct-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cy74fct541ctsoct.step` / `cy74fct541ctsoct.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/cy74fct541t) (13 pp, sha256 `fa5ec40367224004`, retrieved 2026-10-03, tier: lcsc)
- **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/cy74fct541ctsoct-datasheet.pdf)