# TMUX4157NDCKR

**Texas Instruments** · Analog Switches, Multiplexers · SC-70-6

TMUX4157NDCKR from Texas Instruments, in a SC-70-6. 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 | S2 | bidirectional | Source pin 2. Can be an input or output. |
| 2 | VSS | power_in | Negative power supply. Most negative power-supply potential; connect a decoupling capacitor ranging from 0.1 µF to 10 µF between VSS and GND. |
| 3 | S1 | bidirectional | Source pin 1. Can be an input or output. |
| 4 | D | bidirectional | Drain pin. Can be an input or output. |
| 5 | GND | power_in | Ground (0 V) reference. |
| 6 | SEL | input | Select pin controls state of the switch: Logic Low = S1 to D, Logic High = S2 to D. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SC-70-6 |
| Category | Interface |
| Pins | 6 |

## CAD (KiCad official)

- Symbol: `TMUX4157NDCKR`
- Footprint: `Package_TO_SOT_SMD:SOT-363_SC-70-6`
- 3D model: SC-70-6 (KiCad packages3D, STEP)
- 3D model files: `tmux4157ndckr-etched.step` / `tmux4157ndckr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tmux4157ndckr.step` / `tmux4157ndckr.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/tmux4157n.pdf) (27 pp, sha256 `b090e4f09c0d2547`, 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/tmux4157ndckr-datasheet.pdf)