# LM4871MM

**Texas Instruments** · Audio Amplifiers · VSSOP-8

LM4871MM from Texas Instruments, in a VSSOP-8. 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 | SHUTDOWN | input | Shutdown control that turns off the amplifier bias circuitry when a logic high (VDD) is applied, giving 0.6µA typical shutdown current; it must be tied to a definite voltage. |
| 2 | BYPASS | passive | Half-supply bypass node that connects to an external capacitor CB (1.0µF recommended) to ground for PSRR and turn-on click and pop performance. |
| 3 | +IN | input | Non-inverting amplifier input. |
| 4 | -IN | input | Inverting amplifier input that sets the closed-loop gain through Ri and Rf, where AVD = 2*(Rf/Ri). |
| 5 | Vo1 | output | Bridged amplifier output 1, driving one side of the load, 180° out of phase with Vo2. |
| 6 | VDD | power_in | Positive supply input for a supply range of 2.0V to 5.5V (absolute maximum 6.0V), which needs a bypass capacitor placed close to the pin. |
| 7 | GND | power_in | Ground connection. |
| 8 | Vo2 | output | Bridged amplifier output 2, driving the other side of the load, 180° out of phase with Vo1. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | VSSOP-8 |
| Category | Amplifiers/Comparators |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `LM4871MM`
- Footprint: `Package_SO:VSSOP-8_2.3x2mm_P0.5mm`
- 3D model: VSSOP-8 (KiCad packages3D, STEP)
- 3D model files: `lm4871mm-etched.step` / `lm4871mm-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm4871mm.step` / `lm4871mm.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/lm4871) (30 pp, sha256 `53dd6f523163b7af`, retrieved 2026-10-08, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-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/lm4871mm-datasheet.pdf)