# 74HC151D

**Nexperia** · Signal Switches, Multiplexers, Decoders · SOIC-16

74HC151D from Nexperia, in a SOIC-16. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | I3 | input | Data input I3; one of eight binary inputs to the multiplexer. |
| 2 | I2 | input | Data input I2; one of eight binary inputs to the multiplexer. |
| 3 | I1 | input | Data input I1; one of eight binary inputs to the multiplexer. |
| 4 | I0 | input | Data input I0; one of eight binary inputs to the multiplexer. |
| 5 | Y | output | Multiplexer output; selected input is routed to this output; forced LOW when E is HIGH. |
| 6 | Y̅ | output | Complementary multiplexer output; complement of Y output; forced HIGH when E is HIGH. |
| 7 | E | input | Enable input (active LOW); when HIGH forces Y LOW and Y̅ HIGH regardless of data inputs. |
| 8 | GND | power_in | Ground; 0 V reference. |
| 9 | S2 | input | Common data select input S2 (most significant bit); selects which of the eight inputs routes to output Y. |
| 10 | S1 | input | Common data select input S1 (middle bit); selects which of the eight inputs routes to output Y. |
| 11 | S0 | input | Common data select input S0 (least significant bit); selects which of the eight inputs routes to output Y. |
| 12 | I7 | input | Data input I7; one of eight binary inputs to the multiplexer. |
| 13 | I6 | input | Data input I6; one of eight binary inputs to the multiplexer. |
| 14 | I5 | input | Data input I5; one of eight binary inputs to the multiplexer. |
| 15 | I4 | input | Data input I4; one of eight binary inputs to the multiplexer. |
| 16 | VCC | power_in | Supply voltage; operating range 2.0 V to 6.0 V per recommended operating conditions. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Nexperia |
| Package | SOIC-16 |
| Category | Logic |
| Pins | 16 |

## CAD (KiCad official)

- Symbol: `74HC151D`
- Footprint: `Package_SO:SOIC-16_3.9x9.9mm_P1.27mm`
- 3D model: SOIC-16 (KiCad packages3D, STEP)
- 3D model files: `74hc151d-etched.step` / `74hc151d-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `74hc151d.step` / `74hc151d.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [Nexperia datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586193211618836480) (16 pp, sha256 `b5f7855f22c4bb88`, retrieved 2026-09-17, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.2`, primary `claude-haiku-4-5-20251001` (text), consensus `claude-sonnet-4-6` (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/74hc151d-datasheet.pdf)