# SN74LV157APWR

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

SN74LV157APWR from Texas Instruments, in a TSSOP-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 | A/B | input | Address select input that routes either the A or B channel input to the output based on its logic level. |
| 2 | 1A | input | Channel 1 data input A. |
| 3 | 1B | input | Channel 1 data input B. |
| 4 | 1Y | output | Channel 1 data output. |
| 5 | 2A | input | Channel 2 data input A. |
| 6 | 2B | input | Channel 2 data input B. |
| 7 | 2Y | output | Channel 2 data output. |
| 8 | GND | power_in | Ground, negative supply reference. |
| 9 | 3Y | output | Channel 3 data output. |
| 10 | 3B | input | Channel 3 data input B. |
| 11 | 3A | input | Channel 3 data input A. |
| 12 | 4Y | output | Channel 4 data output. |
| 13 | 4B | input | Channel 4 data input B. |
| 14 | 4A | input | Channel 4 data input A. |
| 15 | G | input | Output strobe (enable) input, active low; forces all outputs low when high. |
| 16 | VCC | power_in | Positive supply voltage, 2 V to 5.5 V. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `SN74LV157APWR`
- Footprint: `Package_SO:TSSOP-16_4.4x5mm_P0.65mm`
- 3D model: TSSOP-16 (KiCad packages3D, STEP)
- 3D model files: `sn74lv157apwr-etched.step` / `sn74lv157apwr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sn74lv157apwr.step` / `sn74lv157apwr.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/sn74lv157a.pdf) (28 pp, sha256 `a2011f2d99dd06d2`, retrieved 2026-10-05, 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/sn74lv157apwr-datasheet.pdf)