# LM4950TS

**Texas Instruments** · Audio Amplifiers · TO-263-9

LM4950TS from Texas Instruments, in a TO-263-9. 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 | VINA | input | Channel A audio input; input voltage range is -0.3V to 9.5V. |
| 2 | SHUTDOWN | input | Active-low shutdown input; high threshold is 2.0V min, low threshold is 0.4V max, input range -0.3V to 9.5V. |
| 3 | VOUTA | output | Channel A amplifier output; voltage range is -0.3V to VDD + 0.3V. |
| 4 | GND | power_in | Ground reference for all voltages; supply voltage is referenced to pins 4 and 5. |
| 5 | GND | power_in | Ground reference for all voltages; supply voltage is referenced to pins 4 and 5. |
| 6 | VDD | power_in | Positive supply; operating range 9.6V to 16V, absolute maximum 18.0V referenced to GND. |
| 7 | VOUTB | output | Channel B amplifier output; voltage range is -0.3V to VDD + 0.3V. |
| 8 | BYPASS | passive | Bypass pin for the half-supply reference, with an external capacitor (CB = 10µF used for the 440ms wake-up time); input range -0.3V to 9.5V. |
| 9 | VINB | input | Channel B audio input; input voltage range is -0.3V to 9.5V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | TO-263-9 |
| Category | Amplifiers/Comparators |
| Pins | 9 |

## CAD (KiCad official)

- Symbol: `LM4950TS`
- Footprint: `Package_TO_SOT_SMD:TO-263-9_TabPin5`
- 3D model: TO-263-9 (KiCad packages3D, STEP)
- 3D model files: `lm4950ts-etched.step` / `lm4950ts-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm4950ts.step` / `lm4950ts.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/lm4950) (32 pp, sha256 `bbf077f112cc51c1`, retrieved 2026-10-03, tier: lcsc)
- **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/lm4950ts-datasheet.pdf)