LM4819MX

{
  "slug": "lm4819mx",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments Audio Amplifiers, SOIC-8. Pinout reviewed by a person against the datasheet, KiCad symbol/footprint/3D.",
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  "component": {
    "mpn": "LM4819MX",
    "manufacturer": "Texas Instruments",
    "package": "SOIC-8",
    "pin_count": 8,
    "category": "Amplifiers/Comparators",
    "subcategory": "Audio Amplifiers",
    "datasheet": "https://www.ti.com/cn/lit/gpn/lm4819",
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    "distributor_links": {
      "lcsc": "C2869175",
      "digikey": "2156-LM4819MX-ND",
      "mouser": "926-LM4819MX"
    },
    "distributor_check": {
      "checked_at": "2026-10-20T22:56:43Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "2156-LM4819MX-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "926-LM4819MX",
        "status": "found",
        "lifecycle": "Obsolete"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "SHUTDOWN",
        "type": "input",
        "description": "Active-high micro-power shutdown control; drive to VDD (VSDIH ≥4.0 V at 5 V supply) to activate shutdown (ISD typ 0.7 µA, max 5.0 µA); drive to GND for normal operation; must not be left floating."
      },
      {
        "number": "2",
        "name": "BYPASS",
        "type": "passive",
        "description": "Internal VDD/2 bias reference bypass pin; connect capacitor CB (≥1.0 µF recommended) from this pin to GND to stabilise the internal mid-supply reference and control turn-on ramp time (CB = 1.0 µF → TON ≈ 2 s)."
      },
      {
        "number": "3",
        "name": "+IN",
        "type": "input",
        "description": "Non-inverting audio input to the first internal amplifier; AC-coupled through Ci (sets −3 dB high-pass with Ri: fc = 1/(2πRiCi)); input voltage range −0.3 V to VDD +0.3 V."
      },
      {
        "number": "4",
        "name": "-IN",
        "type": "input",
        "description": "Inverting input to the first internal amplifier; feedback resistor Rf is connected here to set differential closed-loop gain AVD = 2(Rf/Ri); input voltage range −0.3 V to VDD +0.3 V."
      },
      {
        "number": "5",
        "name": "Vo1",
        "type": "output",
        "description": "Bridge output 1 from the first internal amplifier; biased at VDD/2 quiescent; drives one terminal of the load differentially against Vo2 to deliver up to 350 mW RMS into 16 Ω (10% THD+N, VDD = 5 V)."
      },
      {
        "number": "6",
        "name": "VDD",
        "type": "power_in",
        "description": "Positive power supply; operating range 2.0 V to 5.5 V (abs max 6.0 V); quiescent current typ 1.5 mA (max 3.0 mA) at 5 V; bypass with 0.1 µF and 10 µF capacitors placed as close to the pin as possible."
      },
      {
        "number": "7",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference for all internal circuitry; all voltages measured with respect to this pin."
      },
      {
        "number": "8",
        "name": "Vo2",
        "type": "output",
        "description": "Bridge output 2 from the second internal amplifier (gain set to −1 by two internal 20 kΩ resistors); 180° out of phase with Vo1; together with Vo1 produces differential swing across the load without an output coupling capacitor."
      }
    ],
    "provenance": {
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      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/lm4819",
        "pages": 31,
        "sha256": "c76a582050c5d98c",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 8,
        "described": 8,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
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}