# SN74LV138ADR

**Texas Instruments** · Signal Switches, Multiplexers, Decoders · SOIC-16

SN74LV138ADR from Texas Instruments, in a SOIC-16. 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 | A0 | input | Binary-select address input 0 for 3-line decoder. |
| 2 | A1 | input | Binary-select address input 1 for 3-line decoder. |
| 3 | A2 | input | Binary-select address input 2 for 3-line decoder. |
| 4 | G0 | input | Active-low strobe input to enable decoder operation. |
| 5 | G1 | input | Active-low strobe input to enable decoder operation. |
| 6 | G2 | input | Active-high strobe input to enable decoder operation. |
| 7 | Y7 | output | Decoded output 7. |
| 8 | GND | power_in | Ground reference. |
| 9 | Y6 | output | Decoded output 6. |
| 10 | Y5 | output | Decoded output 5. |
| 11 | Y4 | output | Decoded output 4. |
| 12 | Y3 | output | Decoded output 3. |
| 13 | Y2 | output | Decoded output 2. |
| 14 | Y1 | output | Decoded output 1. |
| 15 | Y0 | output | Decoded output 0. |
| 16 | VCC | power_in | Positive power supply, 2V to 5.5V operating range. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-16 |
| Category | Logic |
| Pins | 16 |

## CAD (KiCad official)

- Symbol: `SN74LV138ADR`
- Footprint: `Package_SO:SOIC-16_3.9x9.9mm_P1.27mm`
- 3D model: SOIC-16 (KiCad packages3D, STEP)
- 3D model files: `sn74lv138adr-etched.step` / `sn74lv138adr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sn74lv138adr.step` / `sn74lv138adr.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/sn74lv138a.pdf) (40 pp, sha256 `2c24708519ee350d`, 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/sn74lv138adr-datasheet.pdf)