# SN74LS05NSR

**Texas Instruments** · Inverters · SOIC-14-208mil

SN74LS05NSR from Texas Instruments, in a SOIC-14-208mil. 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 | 1A | input | Input of inverter 1; a logic low input gives a high output (Y = A̅ per the function table, H-to-L and L-to-H). |
| 2 | 1Y | output | Open-collector output of inverter 1; requires an external pullup resistor, and the off-state output voltage is rated at 7 V maximum. |
| 3 | 2A | input | Input of inverter 2; input voltage is rated at 7 V maximum for the LS family. |
| 4 | 2Y | output | Open-collector output of inverter 2; requires an external pullup resistor, and the off-state output voltage is rated at 7 V maximum. |
| 5 | 3A | input | Input of inverter 3; input voltage is rated at 7 V maximum for the LS family. |
| 6 | 3Y | output | Open-collector output of inverter 3; requires an external pullup resistor, and the off-state output voltage is rated at 7 V maximum. |
| 7 | GND | power_in | Ground reference; voltages are specified with respect to the network ground terminal. |
| 8 | 4Y | output | Open-collector output of inverter 4; requires an external pullup resistor, and the off-state output voltage is rated at 7 V maximum. |
| 9 | 4A | input | Input of inverter 4; input voltage is rated at 7 V maximum for the LS family. |
| 10 | 5Y | output | Open-collector output of inverter 5; requires an external pullup resistor, and the off-state output voltage is rated at 7 V maximum. |
| 11 | 5A | input | Input of inverter 5; input voltage is rated at 7 V maximum for the LS family. |
| 12 | 6Y | output | Open-collector output of inverter 6; requires an external pullup resistor, and the off-state output voltage is rated at 7 V maximum. |
| 13 | 6A | input | Input of inverter 6; input voltage is rated at 7 V maximum for the LS family. |
| 14 | VCC | power_in | Supply voltage; recommended range is 4.75 V to 5.25 V for SN74LS05 and the absolute maximum is 7 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-14-208mil |
| Category | Logic |
| Pins | 14 |

## CAD (KiCad official)

- Symbol: `SN74LS05NSR`
- Footprint: `Package_SO:SOIC-14_3.9x8.7mm_P1.27mm`
- 3D model: SOIC-14-208mil (KiCad packages3D, STEP)
- 3D model files: `sn74ls05nsr-etched.step` / `sn74ls05nsr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sn74ls05nsr.step` / `sn74ls05nsr.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/sn54s05) (28 pp, sha256 `06bfc733a844b0c4`, retrieved 2026-10-08, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (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/sn74ls05nsr-datasheet.pdf)