# LM4889MM

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

LM4889MM 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 | Active-low shutdown input that turns off the amplifier bias circuitry when driven low (input low below 0.4V max, input high 1.2V min at VDD = 5V). |
| 2 | BYPASS | passive | Half-supply (VDD/2) bypass node that needs an external capacitor CB (1.0 µF recommended) for half-supply filtering and turn-on pop performance. |
| 3 | +IN | input | Non-inverting input of the first amplifier. |
| 4 | -IN | input | Inverting input of the first amplifier, where the Ri/Rf resistors set differential gain AVD = 2*(Rf/Ri). |
| 5 | Vo1 | output | First amplifier output, one side of the bridge-tied load, 180° out of phase with Vo2 and biased at VDD/2. |
| 6 | VDD | power_in | Positive supply, operating range 2.2V to 5.5V (absolute maximum 6.0V), with a bypass capacitor placed close to the pin. |
| 7 | GND | power_in | Ground. |
| 8 | Vo2 | output | Second amplifier output, the other side of the bridge-tied load, an inverted unity-gain copy of Vo1 biased at VDD/2. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `LM4889MM`
- Footprint: `Package_SO:VSSOP-8_2.3x2mm_P0.5mm`
- 3D model: VSSOP-8 (KiCad packages3D, STEP)
- 3D model files: `lm4889mm-etched.step` / `lm4889mm-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm4889mm.step` / `lm4889mm.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/lm4889) (31 pp, sha256 `1142703d6502f7cd`, retrieved 2026-10-03, 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/lm4889mm-datasheet.pdf)