component
LM4990MM
Public Made by Adomby adom
Texas Instruments Audio Amplifiers, VSSOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownLM4990MM
Texas Instruments · Audio Amplifiers · VSSOP-8
LM4990MM 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 control input; for the DGK package the Shutdown Mode is permanently fixed as shutdown-low (SD MODE internally tied to GND), so driving this pin low places the device in shutdown (ISD typ 0.1 µA, max 2.0 µA). |
| 2 | BYPASS | passive | Internal half-supply (VDD/2) voltage divider bypass pin; a 1.0 µF capacitor to GND is recommended here to minimize turn-on pop and to set the ramp rate of the quiescent DC output voltage. |
| 3 | +IN | input | Non-inverting audio signal input to the first internal operational amplifier; input voltage range −0.3 V to VDD + 0.3 V absolute maximum. |
| 4 | -IN | input | Inverting audio signal input to the first internal operational amplifier; closed-loop gain is set by the ratio of external feedback resistor Rf to input resistor Ri connected to this pin. |
| 5 | VO1 | output | BTL output of the first (gain-configurable) amplifier; biased at VDD/2 quiescent, delivers up to 1.25 W into 8 Ω at 5 V with ≤1% THD+N. |
| 6 | VDD | power_in | Positive power supply pin; operating range 2.2 V to 5.5 V, absolute maximum 6.0 V; bypass with a 10 µF bulk capacitor and a ceramic decoupling capacitor placed as close to the pin as possible. |
| 7 | GND | power_in | Ground reference pin; all voltages in the datasheet are measured with respect to this pin. |
| 8 | VO2 | output | BTL output of the second internal unity-gain inverting amplifier; 180° out of phase with VO1 to form the bridge-tied load; biased at VDD/2 quiescent. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | VSSOP-8 |
| Category | Amplifiers/Comparators |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
LM4990MM - Footprint:
Package_SO:VSSOP-8_2.3x2mm_P0.5mm - 3D model: VSSOP-8 (KiCad packages3D, STEP)
- 3D model files:
lm4990mm-etched.step/lm4990mm-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm4990mm.step/lm4990mm.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (30 pp, sha256
99609ebc1689ea83, retrieved 2026-09-27, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-sonnet-4-6(text+vision), consensusclaude-opus-4-7(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).