component
LM4990MMX
Public Made by Adomby adom
Texas Instruments Global Sourcing Parts, 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
markdownLM4990MMX
Texas Instruments · Global Sourcing Parts · VSSOP-8
LM4990MMX 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; pulling low (same state as internally-tied GND SD MODE) enters ultra-low-power shutdown; ISD = 0.1 µA typ, 2.0 µA max. |
| 2 | BYPASS | passive | Half-supply voltage bypass pin; connect a 1.0 µF capacitor to GND here to set the internal mid-supply reference and minimize turn-on pop. |
| 3 | +IN | input | Non-inverting audio signal input to amplifier 1; input voltage range −0.3 V to VDD + 0.3 V; input impedance set by external Ri. |
| 4 | -IN | input | Inverting audio signal input to amplifier 1; closed-loop gain set by external Rf/Ri ratio; AVD = 2×(Rf/Ri). |
| 5 | VO1 | output | BTL output of amplifier 1 (externally gain-configurable); biased at VDD/2 quiescent; drives one end of the speaker load; 1.25 W typ into 8 Ω at 5 V, 1% THD+N. |
| 6 | VDD | power_in | Positive supply voltage; operating range 2.2 V to 5.5 V; absolute maximum 6.0 V; decouple with 10 µF bulk and local ceramic capacitor as close as possible to pin. |
| 7 | GND | power_in | Ground reference for all internal circuitry; θJA = 190 °C/W for the VSSOP package; all voltages measured with respect to this pin. |
| 8 | VO2 | output | BTL output of amplifier 2 (internally fixed unity-gain inverting); 180° out of phase with VO1; biased at VDD/2 quiescent; completes the differential bridge drive. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | VSSOP-8 |
| Category | Global Sourcing Parts |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
LM4990MMX - Footprint:
Package_SO:VSSOP-8_2.3x2mm_P0.5mm - 3D model: VSSOP-8 (KiCad packages3D, STEP)
- 3D model files:
lm4990mmx-etched.step/lm4990mmx-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm4990mmx.step/lm4990mmx.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 2026-09-26, 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).