# SN74HCT273PWR

**Texas Instruments** · Flip Flops · TSSOP-20

SN74HCT273PWR from Texas Instruments, in a TSSOP-20. 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 | CLR | input | Clear for all channels, active low |
| 2 | 1Q | output | Output for channel 1 |
| 3 | 1D | input | Input for channel 1 |
| 4 | 2D | input | Input for channel 2 |
| 5 | 2Q | output | Output for channel 2 |
| 6 | 3Q | output | Output for channel 3 |
| 7 | 3D | input | Input for channel 3 |
| 8 | 4D | input | Input for channel 4 |
| 9 | 4Q | output | Output for channel 4 |
| 10 | GND | power_in | Ground |
| 11 | CLK | input | Clock for all channels, rising edge triggered |
| 12 | 5Q | output | Output for channel 5 |
| 13 | 5D | input | Input for channel 5 |
| 14 | 6D | input | Input for channel 6 |
| 15 | 6Q | output | Output for channel 6 |
| 16 | 7Q | output | Output for channel 7 |
| 17 | 7D | input | Input for channel 7 |
| 18 | 8D | input | Input for channel 8 |
| 19 | 8Q | output | Output for channel 8 |
| 20 | VCC | power_in | Positive supply |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | TSSOP-20 |
| Category | Logic |
| Pins | 20 |

## CAD (KiCad official)

- Symbol: `SN74HCT273PWR`
- Footprint: `Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm`
- 3D model: TSSOP-20 (KiCad packages3D, STEP)
- 3D model files: `sn74hct273pwr-etched.step` / `sn74hct273pwr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sn74hct273pwr.step` / `sn74hct273pwr.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/lit/ds/symlink/sn74hct273.pdf) (28 pp, sha256 `83413739db9688f7`, retrieved 2026-10-01, tier: manufacturer)
- **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/sn74hct273pwr-datasheet.pdf)