# SN74F574NSR

**Texas Instruments** · Flip Flops · SOP-20-208mil

SN74F574NSR from Texas Instruments, in a SOP-20-208mil. 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 | Output Enable; asserts low to enable 3-state outputs, high for high-impedance state |
| 2 | 1D | input | Data input for flip-flop 1; sampled on rising edge of clock |
| 3 | 2D | input | Data input for flip-flop 2; sampled on rising edge of clock |
| 4 | 3D | input | Data input for flip-flop 3; sampled on rising edge of clock |
| 5 | 4D | input | Data input for flip-flop 4; sampled on rising edge of clock |
| 6 | 5D | input | Data input for flip-flop 5; sampled on rising edge of clock |
| 7 | 6D | input | Data input for flip-flop 6; sampled on rising edge of clock |
| 8 | 7D | input | Data input for flip-flop 7; sampled on rising edge of clock |
| 9 | 8D | input | Data input for flip-flop 8; sampled on rising edge of clock |
| 10 | GND | power_in | Ground |
| 11 | CLK | input | Clock input; positive edge-triggered, latches data inputs to Q outputs on rising edge |
| 12 | 8Q | tri_state | Data output for flip-flop 8; 3-state tri-state output, high-impedance when OE high |
| 13 | 7Q | tri_state | Data output for flip-flop 7; 3-state tri-state output, high-impedance when OE high |
| 14 | 6Q | tri_state | Data output for flip-flop 6; 3-state tri-state output, high-impedance when OE high |
| 15 | 5Q | tri_state | Data output for flip-flop 5; 3-state tri-state output, high-impedance when OE high |
| 16 | 4Q | tri_state | Data output for flip-flop 4; 3-state tri-state output, high-impedance when OE high |
| 17 | 3Q | tri_state | Data output for flip-flop 3; 3-state tri-state output, high-impedance when OE high |
| 18 | 2Q | tri_state | Data output for flip-flop 2; 3-state tri-state output, high-impedance when OE high |
| 19 | 1Q | tri_state | Data output for flip-flop 1; 3-state tri-state output, high-impedance when OE high |
| 20 | VCC | power_in | Supply voltage; 4.5 V to 5.5 V nominal 5 V |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOP-20-208mil |
| Category | Logic |
| Pins | 20 |

## CAD (KiCad official)

- Symbol: `SN74F574NSR`
- Footprint: `Package_SO:SOP-20_7.5x12.8mm_P1.27mm`
- 3D model: SOP-20-208mil (KiCad packages3D, STEP)
- 3D model files: `sn74f574nsr-etched.step` / `sn74f574nsr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sn74f574nsr.step` / `sn74f574nsr.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/sn74f574) (15 pp, sha256 `48cf86fb2d60d692`, retrieved 2026-10-07, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.2`, 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/sn74f574nsr-datasheet.pdf)