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Ray Set visibility: public 2770f71 7h ago
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{
  "schema_version": 1,
  "type": "component",
  "slug": "74hc138drg",
  "title": "74HC138DRG",
  "brief": "HANSCHIP semiconductor Signal Switches, Multiplexers, Decoders, SOP-16. 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",
    "74hc138drg",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "74HC138DRG",
    "manufacturer": "HANSCHIP semiconductor",
    "package": "SOP-16",
    "pin_count": 16,
    "category": "Logic",
    "subcategory": "Signal Switches, Multiplexers, Decoders",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603358269725962240",
    "parts": {
      "symbol": "74hc138drg.kicad_sym",
      "footprint": "74hc138drg.kicad_mod",
      "model_3d": "74hc138drg-hero.glb",
      "model_3d_plain": "74hc138drg-etched.glb",
      "model_3d_step": "74hc138drg-etched.step",
      "model_3d_step_plain": "74hc138drg.step",
      "lbr": "74hc138drg.lbr"
    },
    "distributor_links": {
      "lcsc": "C22439339"
    },
    "distributor_check": {
      "checked_at": "2026-10-15T14:20:29Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "A",
        "type": "input",
        "description": "Data/address input A, the least significant bit of the 3-bit binary select code that chooses one of the eight outputs."
      },
      {
        "number": "2",
        "name": "B",
        "type": "input",
        "description": "Data/address input B, the middle bit of the 3-bit binary select code that chooses one of the eight outputs."
      },
      {
        "number": "3",
        "name": "C",
        "type": "input",
        "description": "Data/address input C, the most significant bit of the 3-bit binary select code that chooses one of the eight outputs."
      },
      {
        "number": "4",
        "name": "G2B",
        "type": "input",
        "description": "Active-low enable input; combined with G2A as G2 = G2A + G2B, the decoder is enabled only when both G2A and G2B are low (together with G1 high)."
      },
      {
        "number": "5",
        "name": "G2A",
        "type": "input",
        "description": "Active-low enable input; combined with G2B as G2 = G2A + G2B, the decoder is enabled only when both G2A and G2B are low (together with G1 high)."
      },
      {
        "number": "6",
        "name": "G1",
        "type": "input",
        "description": "Active-high enable input; the decoder outputs are enabled only when G1 is high (together with G2A and G2B low)."
      },
      {
        "number": "7",
        "name": "Y7",
        "type": "output",
        "description": "Decoded active-low output 7 of the 8-bit parallel output set Y0 to Y7; goes low when selected and enabled."
      },
      {
        "number": "8",
        "name": "GND",
        "type": "power_in",
        "description": "Power ground pin."
      },
      {
        "number": "9",
        "name": "Y6",
        "type": "output",
        "description": "Decoded active-low output 6 of the 8-bit parallel output set Y0 to Y7; goes low when selected and enabled."
      },
      {
        "number": "10",
        "name": "Y5",
        "type": "output",
        "description": "Decoded active-low output 5 of the 8-bit parallel output set Y0 to Y7; goes low when selected and enabled."
      },
      {
        "number": "11",
        "name": "Y4",
        "type": "output",
        "description": "Decoded active-low output 4 of the 8-bit parallel output set Y0 to Y7; goes low when selected and enabled."
      },
      {
        "number": "12",
        "name": "Y3",
        "type": "output",
        "description": "Decoded active-low output 3 of the 8-bit parallel output set Y0 to Y7; goes low when selected and enabled."
      },
      {
        "number": "13",
        "name": "Y2",
        "type": "output",
        "description": "Decoded active-low output 2 of the 8-bit parallel output set Y0 to Y7; goes low when selected and enabled."
      },
      {
        "number": "14",
        "name": "Y1",
        "type": "output",
        "description": "Decoded active-low output 1 of the 8-bit parallel output set Y0 to Y7; goes low when selected and enabled."
      },
      {
        "number": "15",
        "name": "Y0",
        "type": "output",
        "description": "Decoded active-low output 0 of the 8-bit parallel output set Y0 to Y7; goes low when selected and enabled."
      },
      {
        "number": "16",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive power supply pin."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The datasheet pin table and package diagram label pin 4 as G2B and pin 5 as G2A, and the bar overlin; Output and input function descriptions are summarized from the page-2 function table and truth table; The datasheet gives VCC and GND only as '电源正' and '电源地' with no SOP-specific pin drawing. The SOP-16"
        ],
        "pages_sent": 10,
        "cost_usd": 0.0449,
        "at": "2026-10-15T14:20:12"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603358269725962240",
        "pages": 10,
        "sha256": "ff89870c2a241011",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 16,
        "described": 16,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "74hc138drg.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          9.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "d5eeddb4c0b304dc61950919b126fc61d7586abd5f16ab71a2a79759ec6498bf",
        "checked": "2026-10-15",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "74hc138drg-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          9.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "c682c6166b336310e2df53206724ec67c6e6290a14d4a89f3a61765035611610",
        "checked": "2026-10-15",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "HANSCHIP semiconductor",
      "Package": "SOP-16",
      "Category": "Logic",
      "Pins": "16"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "ff89870c2a241011b59b28b385d8ba50ad69705f6d9f5c8316afa19b17a26d92",
      "rows": [
        {
          "name": "电源电压 (Supply voltage)",
          "symbol": "VCC",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.5,
          "typ": null,
          "max": 6.5,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "输入/输出电压 (Input/output voltage)",
          "symbol": "VIN、VOUT",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.5,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "输入/输出钳位电流 (Input/output clamp current)",
          "symbol": "IIK、IOK",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 20,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "单个管脚输出电流 (Output current per pin)",
          "symbol": "IOUT",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 25,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "单个管脚接 VCC 或 GND 电流 (Current per pin to VCC or GND)",
          "symbol": "ICC",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 50,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "耗散功率 (Power dissipation)",
          "symbol": "PD",
          "kind": "absolute_maximum",
          "unit": "mW",
          "min": null,
          "typ": null,
          "max": 500,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "工作温度 (Operating temperature)",
          "symbol": "TA",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "存储温度 (Storage temperature)",
          "symbol": "TS",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "引脚焊接温度 (Lead soldering temperature)",
          "symbol": "TL",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": null,
          "typ": null,
          "max": 245,
          "conditions": "10 s",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "电源电压 (Supply voltage)",
          "symbol": "VCC",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 2,
          "typ": 5,
          "max": 6,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "输入输出电压 (Input/output voltage)",
          "symbol": "VIN、Vout",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 0,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "输入上升/下降时间 (Input rise/fall time)",
          "symbol": "tr tf",
          "kind": "recommended_operating",
          "unit": "ns",
          "min": 0,
          "typ": null,
          "max": 1000,
          "conditions": "VCC=2.0V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "输入上升/下降时间 (Input rise/fall time)",
          "symbol": "tr tf",
          "kind": "recommended_operating",
          "unit": "ns",
          "min": 0,
          "typ": null,
          "max": 500,
          "conditions": "VCC=4.5V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "输入上升/下降时间 (Input rise/fall time)",
          "symbol": "tr tf",
          "kind": "recommended_operating",
          "unit": "ns",
          "min": 0,
          "typ": null,
          "max": 400,
          "conditions": "VCC=6.0V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "高电平有效输入电压 (High-level input voltage)",
          "symbol": "VIH",
          "kind": "electrical",
          "unit": "V",
          "min": 1.5,
          "typ": null,
          "max": null,
          "conditions": "TA=25℃; VCC=2.0V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "高电平有效输入电压 (High-level input voltage)",
          "symbol": "VIH",
          "kind": "electrical",
          "unit": "V",
          "min": 3.15,
          "typ": null,
          "max": null,
          "conditions": "TA=25℃; VCC=4.5V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "高电平有效输入电压 (High-level input voltage)",
          "symbol": "VIH",
          "kind": "electrical",
          "unit": "V",
          "min": 4.2,
          "typ": null,
          "max": null,
          "conditions": "TA=25℃; VCC=6.0V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "低电平有效输入电压 (Low-level input voltage)",
          "symbol": "VIL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.5,
          "conditions": "TA=25℃; VCC=2.0V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "低电平有效输入电压 (Low-level input voltage)",
          "symbol": "VIL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 1.35,
          "conditions": "TA=25℃; VCC=4.5V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "低电平有效输入电压 (Low-level input voltage)",
          "symbol": "VIL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 1.8,
          "conditions": "TA=25℃; VCC=6.0V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "高电平输出电压 (High-level output voltage)",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": 1.9,
          "typ": null,
          "max": null,
          "conditions": "TA=25℃; VI= VIH or VIL; IOH=20μA; VCC=2.0V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "高电平输出电压 (High-level output voltage)",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": 4.4,
          "typ": null,
          "max": null,
          "conditions": "TA=25℃; VI= VIH or VIL; IOH=20μA; VCC=4.5V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "高电平输出电压 (High-level output voltage)",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": 5.9,
          "typ": null,
          "max": null,
          "conditions": "TA=25℃; VI= VIH or VIL; IOH=20μA; VCC=6.0V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "高电平输出电压 (High-level output voltage)",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": 3.9,
          "typ": 4.3,
          "max": null,
          "conditions": "TA=25℃; VI= VIH or VIL; IOH=4.0mA; VCC=4.5V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "高电平输出电压 (High-level output voltage)",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": 5.2,
          "typ": 5.7,
          "max": null,
          "conditions": "TA=25℃; VI= VIH or VIL; IOH=5.2mA; VCC=6.0V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "低电平输出电压 (Low-level output voltage)",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.1,
          "conditions": "TA=25℃; VI= VIH or VIL; IOH=20μA; VCC=2.0V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "低电平输出电压 (Low-level output voltage)",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 0.2,
          "max": 0.5,
          "conditions": "TA=25℃; VI= VIH or VIL; IOH=4.0mA; VCC=4.5V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "低电平输出电压 (Low-level output voltage)",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 0.3,
          "max": 0.5,
          "conditions": "TA=25℃; VI= VIH or VIL; IOH=5.2mA; VCC=6.0V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "输入电流 (Input current)",
          "symbol": "IIN",
          "kind": "electrical",
          "unit": "uA",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "TA=25℃; VI=VCC or GND; VCC=6.0V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "工作电流 (Operating/supply current)",
          "symbol": "ICC",
          "kind": "electrical",
          "unit": "uA",
          "min": null,
          "typ": null,
          "max": 5,
          "conditions": "TA=25℃; VI=VCC or GND; IOUT=0μA; VCC=6.0V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "传输延迟时间 (Propagation delay) A、B、C to Output, high-to-low",
          "symbol": "tPHL",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 24,
          "max": null,
          "conditions": "Ta=25℃; VCC=5.0V; CL=16pF; tr=tf≤20ns",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "传输延迟时间 (Propagation delay) A、B、C to Output, low-to-high",
          "symbol": "tPLH",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 18,
          "max": null,
          "conditions": "Ta=25℃; VCC=5.0V; CL=16pF; tr=tf≤20ns",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "传输延迟时间 (Propagation delay) G1 to Output, high-to-low",
          "symbol": "tPHL",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 25,
          "max": null,
          "conditions": "Ta=25℃; VCC=5.0V; CL=16pF; tr=tf≤20ns",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "传输延迟时间 (Propagation delay) G1 to Output, low-to-high",
          "symbol": "tPLH",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 17,
          "max": null,
          "conditions": "Ta=25℃; VCC=5.0V; CL=16pF; tr=tf≤20ns",
          "source_page": 5,
          "source": "datasheet"
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