main
Ray Brief states the pinout check that actually ran (was an unconditional "Datasheet-verified pinout") 452e915 11d ago
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  "title": "CD74HCT238M96",
  "brief": "Texas Instruments Signal Switches / Encoders & Decoders / Multiplexers, SOP-16. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
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    "pins": [
      {
        "number": "1",
        "name": "A0",
        "type": "input",
        "description": "Address select input, least significant bit. TTL-compatible input selects one of eight outputs together with A1 and A2."
      },
      {
        "number": "2",
        "name": "A1",
        "type": "input",
        "description": "Address select input, middle bit. TTL-compatible input contributing to output selection."
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      {
        "number": "3",
        "name": "A2",
        "type": "input",
        "description": "Address select input, most significant bit. TTL-compatible input contributing to output selection."
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      {
        "number": "4",
        "name": "E1",
        "type": "input",
        "description": "Active-low enable input. Must be low along with E2 low and E3 high to enable decoder outputs; otherwise all outputs are low."
      },
      {
        "number": "5",
        "name": "E2",
        "type": "input",
        "description": "Active-low enable input. Must be low along with E1 low and E3 high to enable decoder outputs."
      },
      {
        "number": "6",
        "name": "E3",
        "type": "input",
        "description": "Active-high enable input. Must be high along with E1 and E2 low to enable decoder outputs."
      },
      {
        "number": "7",
        "name": "Y7",
        "type": "output",
        "description": "Decoded active-high output 7. Asserts high when A2:A0 = 111 and the device is enabled; otherwise low."
      },
      {
        "number": "8",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference (0 V) for the device."
      },
      {
        "number": "9",
        "name": "Y6",
        "type": "output",
        "description": "Decoded active-high output 6. Asserts high when A2:A0 = 110 and the device is enabled."
      },
      {
        "number": "10",
        "name": "Y5",
        "type": "output",
        "description": "Decoded active-high output 5. Asserts high when A2:A0 = 101 and the device is enabled."
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      {
        "number": "11",
        "name": "Y4",
        "type": "output",
        "description": "Decoded active-high output 4. Asserts high when A2:A0 = 100 and the device is enabled."
      },
      {
        "number": "12",
        "name": "Y3",
        "type": "output",
        "description": "Decoded active-high output 3. Asserts high when A2:A0 = 011 and the device is enabled."
      },
      {
        "number": "13",
        "name": "Y2",
        "type": "output",
        "description": "Decoded active-high output 2. Asserts high when A2:A0 = 010 and the device is enabled."
      },
      {
        "number": "14",
        "name": "Y1",
        "type": "output",
        "description": "Decoded active-high output 1. Asserts high when A2:A0 = 001 and the device is enabled."
      },
      {
        "number": "15",
        "name": "Y0",
        "type": "output",
        "description": "Decoded active-high output 0. Asserts high when A2:A0 = 000 and the device is enabled."
      },
      {
        "number": "16",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply voltage input. Operating range 4.5 V to 5.5 V for HCT logic family."
      }
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    "logic": {
      "family_id": "74HCT238",
      "logic_family": "74HCT",
      "function_code": "238",
      "function_class": "Decoder",
      "function_name": "3-to-8 Line Decoder, Active-High Outputs",
      "manufacturer": "Texas Instruments",
      "is_specialty": false
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  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "SOP-16",
      "Category": "Logic",
      "Pins": "16"
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  "discovery_pitch": "CD74HCT238M96 (Texas Instruments) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
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  "updated_at": "2026-09-24T18:57:46.081Z"
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