MM74HC244WMX

{
  "schema_version": 1,
  "type": "component",
  "slug": "mm74hc244wmx",
  "title": "MM74HC244WMX",
  "brief": "onsemi Buffers / Drivers, SOIC-20-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "logic ics",
    "mm74hc244wmx",
    "factory-2.0.0",
    "extractor-text"
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  "component": {
    "mpn": "MM74HC244WMX",
    "manufacturer": "onsemi",
    "package": "SOIC-20-300mil",
    "pin_count": 20,
    "category": "Logic ICs",
    "subcategory": "Buffers / Drivers",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/955607492d10472bb0a07c665236d261.pdf",
    "parts": {
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      "model_3d_step": "mm74hc244wmx-etched.step",
      "model_3d_step_plain": "mm74hc244wmx.step",
      "lbr": "mm74hc244wmx.lbr"
    },
    "distributor_links": {
      "lcsc": "C5624",
      "digikey": "MM74HC244WMXTR-ND",
      "mouser": "512-MM74HC244WMX"
    },
    "distributor_check": {
      "checked_at": "2026-10-23T13:39:46Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "MM74HC244WMXTR-ND",
        "status": "found"
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      "mouser": {
        "pn": "512-MM74HC244WMX",
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    },
    "pins": [
      {
        "number": "1",
        "name": "1G",
        "type": "input",
        "description": "Active-low 3-STATE enable for the first group of four buffers (1A1-1A4 to 1Y1-1Y4); outputs go high-impedance when high."
      },
      {
        "number": "2",
        "name": "1A1",
        "type": "input",
        "description": "Buffer input 1 of group 1, non-inverting to 1Y1."
      },
      {
        "number": "3",
        "name": "2Y4",
        "type": "tri_state",
        "description": "3-STATE buffer output 4 of group 2, controlled by 2G with 6 mA output drive."
      },
      {
        "number": "4",
        "name": "1A2",
        "type": "input",
        "description": "Buffer input 2 of group 1, non-inverting to 1Y2."
      },
      {
        "number": "5",
        "name": "2Y3",
        "type": "tri_state",
        "description": "3-STATE buffer output 3 of group 2, controlled by 2G with 6 mA output drive."
      },
      {
        "number": "6",
        "name": "1A3",
        "type": "input",
        "description": "Buffer input 3 of group 1, non-inverting to 1Y3."
      },
      {
        "number": "7",
        "name": "2Y2",
        "type": "tri_state",
        "description": "3-STATE buffer output 2 of group 2, controlled by 2G with 6 mA output drive."
      },
      {
        "number": "8",
        "name": "1A4",
        "type": "input",
        "description": "Buffer input 4 of group 1, non-inverting to 1Y4."
      },
      {
        "number": "9",
        "name": "2Y1",
        "type": "tri_state",
        "description": "3-STATE buffer output 1 of group 2, controlled by 2G with 6 mA output drive."
      },
      {
        "number": "10",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference for the device."
      },
      {
        "number": "11",
        "name": "2A1",
        "type": "input",
        "description": "Buffer input 1 of group 2, non-inverting to 2Y1."
      },
      {
        "number": "12",
        "name": "1Y4",
        "type": "tri_state",
        "description": "3-STATE buffer output 4 of group 1, controlled by 1G with 6 mA output drive."
      },
      {
        "number": "13",
        "name": "2A2",
        "type": "input",
        "description": "Buffer input 2 of group 2, non-inverting to 2Y2."
      },
      {
        "number": "14",
        "name": "1Y3",
        "type": "tri_state",
        "description": "3-STATE buffer output 3 of group 1, controlled by 1G with 6 mA output drive."
      },
      {
        "number": "15",
        "name": "2A3",
        "type": "input",
        "description": "Buffer input 3 of group 2, non-inverting to 2Y3."
      },
      {
        "number": "16",
        "name": "1Y2",
        "type": "tri_state",
        "description": "3-STATE buffer output 2 of group 1, controlled by 1G with 6 mA output drive."
      },
      {
        "number": "17",
        "name": "2A4",
        "type": "input",
        "description": "Buffer input 4 of group 2, non-inverting to 2Y4."
      },
      {
        "number": "18",
        "name": "1Y1",
        "type": "tri_state",
        "description": "3-STATE buffer output 1 of group 1, controlled by 1G with 6 mA output drive."
      },
      {
        "number": "19",
        "name": "2G",
        "type": "input",
        "description": "Active-low 3-STATE enable for the second group of four buffers (2A1-2A4 to 2Y1-2Y4); outputs go high-impedance when high."
      },
      {
        "number": "20",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply voltage, recommended 2 to 6 V (absolute maximum -0.5 to +7.0 V)."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
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        "guards": "pin_guards 0.1: passed",
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        "cost_usd": 0.24,
        "at": "2026-10-23T13:39:35"
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      "datasheet": {
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        "pages": 8,
        "sha256": "de4b4c7bf6fc2071",
        "source_tier": "lcsc"
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      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 20,
        "described": 20,
        "cites_pages": true,
        "refuses_to_fabricate": true
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    },
    "viewers": {
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      "footprint": "viewers/footprint.html"
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        "units": "mm",
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        "seat": "z = 0",
        "extents_mm": [
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        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "59a10b341e6972b31d81802a048060326da627d8b92dcf4263064f4f62ec808e",
        "checked": "2026-10-23",
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "onsemi",
      "Package": "SOIC-20-300mil",
      "Category": "Logic ICs",
      "Pins": "20"
    },
    "characteristics": {
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      "source": "datasheet",
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          "name": "DC Input Voltage",
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          "conditions": "-1.5 to VCC +1.5V",
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          "name": "DC Output Voltage",
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          "name": "DC Output Current, per pin",
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          "name": "Storage Temperature Range",
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          "unit": "°C",
          "min": -65,
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        {
          "name": "Power Dissipation",
          "symbol": "PD",
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          "unit": "mW",
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        {
          "name": "Lead Temperature",
          "symbol": "TL",
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          "max": 260,
          "conditions": "Soldering 10 seconds",
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          "max": null,
          "conditions": "0 to VCC",
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          "name": "Operating Temperature Range",
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          "conditions": "",
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          "name": "Input Rise or Fall Times",
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          "kind": "recommended_operating",
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          "min": null,
          "typ": null,
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          "conditions": "VCC = 2.0V",
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          "kind": "electrical",
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          "conditions": "VCC = 2.0V, TA = -40 to 85°C",
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          "name": "Minimum HIGH Level Input Voltage",
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        {
          "name": "Minimum HIGH Level Input Voltage",
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          "conditions": "VCC = 2.0V, TA = -40 to 85°C",
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          "name": "Maximum LOW Level Input Voltage",
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        {
          "name": "Minimum HIGH Level Output Voltage",
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          "min": 1.9,
          "typ": 2,
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          "conditions": "VIN = VIH or VIL, |IOUT| ≤ 20 µA, VCC = 2.0V, TA = -40 to 85°C",
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        {
          "name": "Minimum HIGH Level Output Voltage",
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          "kind": "electrical",
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          "min": 4.4,
          "typ": 4.5,
          "max": null,
          "conditions": "VIN = VIH or VIL, |IOUT| ≤ 20 µA, VCC = 4.5V, TA = -40 to 85°C",
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        {
          "name": "Minimum HIGH Level Output Voltage",
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          "kind": "electrical",
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          "min": 5.9,
          "typ": 6,
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          "conditions": "VIN = VIH or VIL, |IOUT| ≤ 20 µA, VCC = 6.0V, TA = -40 to 85°C",
          "source_page": 3,
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        },
        {
          "name": "Minimum HIGH Level Output Voltage",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": 3.84,
          "typ": 4.2,
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          "conditions": "VIN = VIH or VIL, |IOUT| ≤ 6.0 mA, VCC = 4.5V, TA = -40 to 85°C",
          "source_page": 3,
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        },
        {
          "name": "Minimum HIGH Level Output Voltage",
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          "kind": "electrical",
          "unit": "V",
          "min": 5.34,
          "typ": 5.7,
          "max": null,
          "conditions": "VIN = VIH or VIL, |IOUT| ≤ 7.8 mA, VCC = 6.0V, TA = -40 to 85°C",
          "source_page": 3,
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        },
        {
          "name": "Maximum LOW Level Output Voltage",
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          "min": null,
          "typ": 0,
          "max": 0.1,
          "conditions": "VIN = VIH or VIL, |IOUT| ≤ 20 µA, VCC = 2.0V, TA = -40 to 85°C",
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        {
          "name": "Maximum LOW Level Output Voltage",
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          "source_page": 3,
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        {
          "name": "Maximum Input Current",
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          "kind": "electrical",
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          "min": -1,
          "typ": 0.1,
          "max": 1,
          "conditions": "VIN = VCC or GND, VCC = 6.0V, TA = -40 to 85°C",
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        {
          "name": "Maximum 3-STATE Output Leakage Current",
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          "kind": "electrical",
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          "min": -5,
          "typ": 0.5,
          "max": 5,
          "conditions": "VIN = VIH or VIL, VOUT = VCC or GND, G = VIH, VCC = 6.0V, TA = -40 to 85°C",
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        {
          "name": "Maximum Quiescent Supply Current",
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          "unit": "µA",
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          "typ": 8,
          "max": 80,
          "conditions": "VIN = VCC or GND, IOUT = 0 µA, VCC = 6.0V, TA = -40 to 85°C",
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          "conditions": "VCC = 5V, TA = 25°C, CL = 45 pF",
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          "name": "Maximum Enable Delay to Active Output",
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          "conditions": "VCC = 5V, TA = 25°C, RL = 1 kΩ, CL = 45 pF",
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          "name": "Maximum Disable Delay from Active Output",
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          "conditions": "VCC = 5V, TA = 25°C, RL = 1 kΩ, CL = 5 pF",
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          "source": "datasheet"
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        {
          "name": "Maximum Propagation Delay",
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          "typ": 58,
          "max": 145,
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          "name": "Maximum Propagation Delay",
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        {
          "name": "Maximum Propagation Delay",
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          "name": "Maximum Propagation Delay",
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          "name": "Maximum Propagation Delay",
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          "conditions": "CL = 50 pF, VCC = 6.0V, TA = -40 to 85°C",
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        {
          "name": "Maximum Propagation Delay",
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          "name": "Maximum Output Enable Time",
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          "conditions": "RL = 1 kΩ, CL = 50 pF, VCC = 2.0V, TA = -40 to 85°C",
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        {
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