CD74HC238E

{
  "slug": "cd74hc238e",
  "version": "0.1.0",
  "type": "component",
  "description": "lingxingic Signal Switches, Multiplexers, Decoders, DIP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "logic",
    "cd74hc238e",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "cd74hc238e.kicad_sym",
    "cd74hc238e.kicad_mod",
    "cd74hc238e.glb",
    "cd74hc238e.step",
    "cd74hc238e.lbr",
    "docs/hero.png",
    "docs/cd74hc238e-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "cd74hc238e-hero.glb",
    "cd74hc238e-hero.overlay.json",
    "cd74hc238e-etched.glb"
  ],
  "component": {
    "mpn": "CD74HC238E",
    "manufacturer": "lingxingic",
    "package": "DIP-16",
    "pin_count": 16,
    "category": "Logic",
    "subcategory": "Signal Switches, Multiplexers, Decoders",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603393151432339456",
    "parts": {
      "symbol": "cd74hc238e.kicad_sym",
      "footprint": "cd74hc238e.kicad_mod",
      "model_3d": "cd74hc238e-hero.glb",
      "model_3d_plain": "cd74hc238e-etched.glb",
      "model_3d_step": "cd74hc238e-etched.step",
      "model_3d_step_plain": "cd74hc238e.step",
      "lbr": "cd74hc238e.lbr"
    },
    "distributor_links": {
      "lcsc": "C22449657",
      "digikey": "296-25983-5-ND",
      "mouser": "595-CD74HC238E"
    },
    "distributor_check": {
      "checked_at": "2026-10-14T21:16:31Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-25983-5-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "595-CD74HC238E",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "A0",
        "type": "input",
        "description": "Binary-weighted address input A0; together with A1 and A2 it selects which one of the eight outputs Y0 to Y7 goes HIGH."
      },
      {
        "number": "2",
        "name": "A1",
        "type": "input",
        "description": "Binary-weighted address input A1; together with A0 and A2 it selects which one of the eight outputs Y0 to Y7 goes HIGH."
      },
      {
        "number": "3",
        "name": "A2",
        "type": "input",
        "description": "Binary-weighted address input A2; together with A0 and A1 it selects which one of the eight outputs Y0 to Y7 goes HIGH."
      },
      {
        "number": "4",
        "name": "E1",
        "type": "input",
        "description": "Enable input, active LOW; all outputs stay LOW unless E1 and E2 are LOW and E3 is HIGH."
      },
      {
        "number": "5",
        "name": "E2",
        "type": "input",
        "description": "Enable input, active LOW; all outputs stay LOW unless E1 and E2 are LOW and E3 is HIGH."
      },
      {
        "number": "6",
        "name": "E3",
        "type": "input",
        "description": "Enable input, active HIGH; all outputs stay LOW unless E1 and E2 are LOW and E3 is HIGH."
      },
      {
        "number": "7",
        "name": "Y7",
        "type": "output",
        "description": "Decoder output Y7, active HIGH; mutually exclusive with the other outputs and LOW unless its address is selected and the enables are active."
      },
      {
        "number": "8",
        "name": "GND",
        "type": "power_in",
        "description": "Ground (0V) reference for all voltages on the device."
      },
      {
        "number": "9",
        "name": "Y6",
        "type": "output",
        "description": "Decoder output Y6, active HIGH; mutually exclusive with the other outputs and LOW unless its address is selected and the enables are active."
      },
      {
        "number": "10",
        "name": "Y5",
        "type": "output",
        "description": "Decoder output Y5, active HIGH; mutually exclusive with the other outputs and LOW unless its address is selected and the enables are active."
      },
      {
        "number": "11",
        "name": "Y4",
        "type": "output",
        "description": "Decoder output Y4, active HIGH; mutually exclusive with the other outputs and LOW unless its address is selected and the enables are active."
      },
      {
        "number": "12",
        "name": "Y3",
        "type": "output",
        "description": "Decoder output Y3, active HIGH; mutually exclusive with the other outputs and LOW unless its address is selected and the enables are active."
      },
      {
        "number": "13",
        "name": "Y2",
        "type": "output",
        "description": "Decoder output Y2, active HIGH; mutually exclusive with the other outputs and LOW unless its address is selected and the enables are active."
      },
      {
        "number": "14",
        "name": "Y1",
        "type": "output",
        "description": "Decoder output Y1, active HIGH; mutually exclusive with the other outputs and LOW unless its address is selected and the enables are active."
      },
      {
        "number": "15",
        "name": "Y0",
        "type": "output",
        "description": "Decoder output Y0, active HIGH; mutually exclusive with the other outputs and LOW unless its address is selected and the enables are active."
      },
      {
        "number": "16",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply voltage; recommended range 2.0 V to 6.0 V for CD74HC238 and 4.5 V to 5.5 V for CD74HCT238 (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-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 pin configuration figure on page 7 is an image and not present in the extracted text; the DIP16 ; Text extraction lost the overbar on the active-LOW enables; they are printed as E1 and E2 (pin names; The ordering table lists CD74HC238E as DIP16 (pin spacing 2.54 mm), so the DIP16 pinout applies to t"
        ],
        "pages_sent": 20,
        "cost_usd": 0.0747,
        "at": "2026-10-14T21:16:14"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603393151432339456",
        "pages": 20,
        "sha256": "bd52e6090cfa20fc",
        "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": "cd74hc238e.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
          7.874,
          19.177,
          6.98
        ],
        "zmin_mm": -3.3,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "17a30b1f0ab3fd5384a1231e3c63c394888d5b952c542a8c189e023ed3467464",
        "checked": "2026-10-14",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "cd74hc238e-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
          7.874,
          19.177,
          6.98
        ],
        "zmin_mm": -3.3,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "d42e219a1c3a792361ffe275f1cc5b2e513a28297185eaa327cf269301c3467f",
        "checked": "2026-10-14",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}