MM74HC138M

{
  "schema_version": 1,
  "type": "component",
  "slug": "mm74hc138m",
  "title": "MM74HC138M",
  "brief": "onsemi Signal Switches, Multiplexers, Decoders, SOIC-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",
    "mm74hc138m",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "MM74HC138M",
    "manufacturer": "onsemi",
    "package": "SOIC-16",
    "pin_count": 16,
    "category": "Logic",
    "subcategory": "Signal Switches, Multiplexers, Decoders",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588930544227274752",
    "parts": {
      "symbol": "mm74hc138m.kicad_sym",
      "footprint": "mm74hc138m.kicad_mod",
      "model_3d": "mm74hc138m-hero.glb",
      "model_3d_plain": "mm74hc138m-etched.glb",
      "model_3d_step": "mm74hc138m-etched.step",
      "model_3d_step_plain": "mm74hc138m.step",
      "lbr": "mm74hc138m.lbr"
    },
    "distributor_links": {
      "lcsc": "C906891",
      "digikey": "MM74HC138M-ND",
      "mouser": "512-MM74HC138M"
    },
    "distributor_check": {
      "checked_at": "2026-10-19T04:25:58Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "MM74HC138M-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "512-MM74HC138M",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "A",
        "type": "input",
        "description": "Binary select input A (LSB); with B and C selects which one of the eight outputs goes LOW when enabled."
      },
      {
        "number": "2",
        "name": "B",
        "type": "input",
        "description": "Binary select input B; with A and C selects which one of the eight outputs goes LOW when enabled."
      },
      {
        "number": "3",
        "name": "C",
        "type": "input",
        "description": "Binary select input C (MSB); with A and B selects which one of the eight outputs goes LOW when enabled."
      },
      {
        "number": "4",
        "name": "G2A",
        "type": "input",
        "description": "Active-LOW enable input; must be LOW (together with G2B LOW and G1 HIGH) to enable the decoder."
      },
      {
        "number": "5",
        "name": "G2B",
        "type": "input",
        "description": "Active-LOW enable input; must be LOW (together with G2A LOW and G1 HIGH) to enable the decoder."
      },
      {
        "number": "6",
        "name": "G1",
        "type": "input",
        "description": "Active-HIGH enable input; must be HIGH (with G2A and G2B LOW) to enable the decoder."
      },
      {
        "number": "7",
        "name": "Y7",
        "type": "output",
        "description": "Active-LOW decoded output 7, normally HIGH and drives 10 LS-TTL loads."
      },
      {
        "number": "8",
        "name": "GND",
        "type": "power_in",
        "description": "Ground, 0 V reference."
      },
      {
        "number": "9",
        "name": "Y6",
        "type": "output",
        "description": "Active-LOW decoded output 6, normally HIGH and drives 10 LS-TTL loads."
      },
      {
        "number": "10",
        "name": "Y5",
        "type": "output",
        "description": "Active-LOW decoded output 5, normally HIGH and drives 10 LS-TTL loads."
      },
      {
        "number": "11",
        "name": "Y4",
        "type": "output",
        "description": "Active-LOW decoded output 4, normally HIGH and drives 10 LS-TTL loads."
      },
      {
        "number": "12",
        "name": "Y3",
        "type": "output",
        "description": "Active-LOW decoded output 3, normally HIGH and drives 10 LS-TTL loads."
      },
      {
        "number": "13",
        "name": "Y2",
        "type": "output",
        "description": "Active-LOW decoded output 2, normally HIGH and drives 10 LS-TTL loads."
      },
      {
        "number": "14",
        "name": "Y1",
        "type": "output",
        "description": "Active-LOW decoded output 1, normally HIGH and drives 10 LS-TTL loads."
      },
      {
        "number": "15",
        "name": "Y0",
        "type": "output",
        "description": "Active-LOW decoded output 0, normally HIGH and drives 10 LS-TTL loads."
      },
      {
        "number": "16",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply voltage, recommended 2 V to 6 V (absolute maximum 7.0 V)."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-sonnet-5-5",
        "primary_mode": "text+vision",
        "consensus_model": "claude-opus-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 9,
        "cost_usd": 0.2987,
        "at": "2026-10-19T04:24:02"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588930544227274752",
        "pages": 9,
        "sha256": "de0da62d7ecfae39",
        "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": "mm74hc138m.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": "2026-10-19",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "mm74hc138m-etched.step",
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        "checked": "2026-10-19",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "onsemi",
      "Package": "SOIC-16",
      "Category": "Logic",
      "Pins": "16"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "de0da62d7ecfae3951e228c8f528ccf41cbbdc547db53c93e6bf95e067697393",
      "rows": [
        {
          "name": "Supply Voltage (VCC) recommended operating",
          "symbol": "VCC",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 2,
          "typ": null,
          "max": 6,
          "conditions": "Recommended operating range; printed as '26' in extracted text, split as 2 and 6 per Features (2V–6V)",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Operating Temperature Range",
          "symbol": "TA",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "DC Input or Output Voltage",
          "symbol": "VIN, VOUT",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 0,
          "typ": null,
          "max": null,
          "conditions": "Maximum printed as VCC",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Input Rise or Fall Time",
          "symbol": "tr, tf",
          "kind": "recommended_operating",
          "unit": "ns",
          "min": null,
          "typ": null,
          "max": 1000,
          "conditions": "VCC = 2.0V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Input Rise or Fall Time",
          "symbol": "tr, tf",
          "kind": "recommended_operating",
          "unit": "ns",
          "min": null,
          "typ": null,
          "max": 500,
          "conditions": "VCC = 4.5V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Input Rise or Fall Time",
          "symbol": "tr, tf",
          "kind": "recommended_operating",
          "unit": "ns",
          "min": null,
          "typ": null,
          "max": 400,
          "conditions": "VCC = 6.0V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Supply Voltage (VCC) absolute maximum",
          "symbol": "VCC",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.5,
          "typ": null,
          "max": 7,
          "conditions": "Absolute maximum rating",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "DC Input Voltage",
          "symbol": "VIN",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -1.5,
          "typ": null,
          "max": null,
          "conditions": "Maximum printed as VCC + 1.5V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "DC Output Voltage",
          "symbol": "VOUT",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.5,
          "typ": null,
          "max": null,
          "conditions": "Maximum printed as VCC + 0.5V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Clamp Diode Current",
          "symbol": "IIK, IOK",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": -20,
          "typ": null,
          "max": 20,
          "conditions": "Printed as ±20 mA",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "DC Output Current, per pin",
          "symbol": "IOUT",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": -25,
          "typ": null,
          "max": 25,
          "conditions": "Printed as ±25 mA, per pin",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "DC VCC or GND Current, per pin",
          "symbol": "ICC",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": -50,
          "typ": null,
          "max": 50,
          "conditions": "Printed as ±50 mA, per pin",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Storage Temperature Range",
          "symbol": "TSTG",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Power Dissipation",
          "symbol": "PD",
          "kind": "absolute_maximum",
          "unit": "mW",
          "min": null,
          "typ": null,
          "max": 500,
          "conditions": "S.O. package only",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Lead Temperature",
          "symbol": "TL",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 260,
          "conditions": "Soldering 10 seconds",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Minimum HIGH Level Input Voltage",
          "symbol": "VIH",
          "kind": "electrical",
          "unit": "V",
          "min": 1.5,
          "typ": null,
          "max": null,
          "conditions": "VCC = 2.0V; limit over TA = -40 to 85°C",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Minimum HIGH Level Input Voltage",
          "symbol": "VIH",
          "kind": "electrical",
          "unit": "V",
          "min": 3.15,
          "typ": null,
          "max": null,
          "conditions": "VCC = 4.5V; limit over TA = -40 to 85°C",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Minimum HIGH Level Input Voltage",
          "symbol": "VIH",
          "kind": "electrical",
          "unit": "V",
          "min": 4.2,
          "typ": null,
          "max": null,
          "conditions": "VCC = 6.0V; limit over TA = -40 to 85°C",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Maximum LOW Level Input Voltage",
          "symbol": "VIL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.5,
          "conditions": "VCC = 2.0V; limit over TA = -40 to 85°C",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Maximum LOW Level Input Voltage",
          "symbol": "VIL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 1.35,
          "conditions": "VCC = 4.5V; limit over TA = -40 to 85°C",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Maximum LOW Level Input Voltage",
          "symbol": "VIL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 1.8,
          "conditions": "VCC = 6.0V; limit over TA = -40 to 85°C",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Minimum HIGH Level Output Voltage",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": 1.9,
          "typ": 2,
          "max": null,
          "conditions": "VIN = VIH or VIL; |IOUT| ≤ 20 µA; VCC = 2.0V; limit over TA = -40 to 85°C",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Minimum HIGH Level Output Voltage",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": 4.4,
          "typ": 4.5,
          "max": null,
          "conditions": "VIN = VIH or VIL; |IOUT| ≤ 20 µA; VCC = 4.5V; limit over TA = -40 to 85°C",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Minimum HIGH Level Output Voltage",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": 5.9,
          "typ": 6,
          "max": null,
          "conditions": "VIN = VIH or VIL; |IOUT| ≤ 20 µA; VCC = 6.0V; limit over TA = -40 to 85°C",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Minimum HIGH Level Output Voltage",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": 3.84,
          "typ": 4.2,
          "max": null,
          "conditions": "VIN = VIH or VIL; |IOUT| ≤ 4.0 mA; VCC = 4.5V; limit over TA = -40 to 85°C",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Minimum HIGH Level Output Voltage",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": 5.34,
          "typ": 5.7,
          "max": null,
          "conditions": "VIN = VIH or VIL; |IOUT| ≤ 5.2 mA; VCC = 6.0V; limit over TA = -40 to 85°C",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Maximum LOW Level Output Voltage",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 0,
          "max": 0.1,
          "conditions": "VIN = VIH or VIL; |IOUT| ≤ 20 µA; VCC = 2.0V; limit over TA = -40 to 85°C",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Maximum LOW Level Output Voltage",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 0.2,
          "max": 0.33,
          "conditions": "VIN = VIH or VIL; |IOUT| ≤ 4.0 mA; VCC = 4.5V; limit over TA = -40 to 85°C",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Maximum Input Current",
          "symbol": "IIN",
          "kind": "electrical",
          "unit": "µA",
          "min": -1,
          "typ": 0.1,
          "max": 1,
          "conditions": "VIN = VCC or GND; VCC = 6.0V; typ printed as ±0.1",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Maximum Quiescent Supply Current",
          "symbol": "ICC",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 8,
          "max": 80,
          "conditions": "VIN = VCC or GND; IOUT = 0 µA; VCC = 6.0V; limit over TA = -40 to 85°C",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Maximum Propagation Delay, Binary Select to any Output (LOW-to-HIGH)",
          "symbol": "tPLH",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 18,
          "max": 25,
          "conditions": "VCC = 5V, TA = 25°C, CL = 15 pF, tr = tf = 6 ns",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Maximum Propagation Delay, Binary Select to any Output (HIGH-to-LOW)",
          "symbol": "tPHL",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 28,
          "max": 35,
          "conditions": "VCC = 5V, TA = 25°C, CL = 15 pF, tr = tf = 6 ns",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Maximum Propagation Delay, G1 to any Output",
          "symbol": "tPHL, tPLH",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 18,
          "max": 25,
          "conditions": "VCC = 5V, TA = 25°C, CL = 15 pF, tr = tf = 6 ns",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Maximum Propagation Delay, G2A or G2B to Output (HIGH-to-LOW)",
          "symbol": "tPHL",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 23,
          "max": 30,
          "conditions": "VCC = 5V, TA = 25°C, CL = 15 pF, tr = tf = 6 ns",
          "source_page": 5,
          "source": "datasheet"
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        {
          "name": "Maximum Propagation Delay, G2A or G2B to Output (LOW-to-HIGH)",
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          "kind": "timing",
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          "min": null,
          "typ": 18,
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          "conditions": "VCC = 5V, TA = 25°C, CL = 15 pF, tr = tf = 6 ns",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Maximum Propagation Delay, Binary Select to any Output (LOW-to-HIGH)",
          "symbol": "tPLH",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 75,
          "max": 189,
          "conditions": "CL = 50 pF, tr = tf = 6 ns; VCC = 2.0V; max over TA = -40 to 85°C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Maximum Propagation Delay, Binary Select to any Output (LOW-to-HIGH)",
          "symbol": "tPLH",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 15,
          "max": 38,
          "conditions": "CL = 50 pF, tr = tf = 6 ns; VCC = 4.5V; max over TA = -40 to 85°C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Maximum Propagation Delay, Binary Select to any Output (LOW-to-HIGH)",
          "symbol": "tPLH",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 13,
          "max": 32,
          "conditions": "CL = 50 pF, tr = tf = 6 ns; VCC = 6.0V; max over TA = -40 to 85°C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Maximum Propagation Delay, Binary Select to any Output (HIGH-to-LOW)",
          "symbol": "tPHL",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 100,
          "max": 252,
          "conditions": "CL = 50 pF, tr = tf = 6 ns; VCC = 2.0V; max over TA = -40 to 85°C",
          "source_page": 5,
          "source": "datasheet"
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        {
          "name": "Maximum Propagation Delay, Binary Select to any Output (HIGH-to-LOW)",
          "symbol": "tPHL",
          "kind": "timing",
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          "min": null,
          "typ": 20,
          "max": 50,
          "conditions": "CL = 50 pF, tr = tf = 6 ns; VCC = 4.5V; max over TA = -40 to 85°C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Maximum Propagation Delay, Binary Select to any Output (HIGH-to-LOW)",
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          "kind": "timing",
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          "min": null,
          "typ": 17,
          "max": 43,
          "conditions": "CL = 50 pF, tr = tf = 6 ns; VCC = 6.0V; max over TA = -40 to 85°C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Maximum Propagation Delay, G1 to any Output",
          "symbol": "tPHL, tPLH",
          "kind": "timing",
          "unit": "ns",
          "min": null,
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