CD4556BM

{
  "slug": "cd4556bm",
  "version": "0.1.0",
  "type": "component",
  "description": "lingxingic Signal Switches, Multiplexers, Decoders, SOP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "logic",
    "cd4556bm",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "cd4556bm.kicad_sym",
    "cd4556bm.kicad_mod",
    "cd4556bm.glb",
    "cd4556bm.step",
    "cd4556bm.lbr",
    "docs/hero.png",
    "docs/cd4556bm-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "cd4556bm-hero.glb",
    "cd4556bm-hero.overlay.json",
    "cd4556bm-etched.glb"
  ],
  "component": {
    "mpn": "CD4556BM",
    "manufacturer": "lingxingic",
    "package": "SOP-16",
    "pin_count": 16,
    "category": "Logic",
    "subcategory": "Signal Switches, Multiplexers, Decoders",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603388814350307328",
    "parts": {
      "symbol": "cd4556bm.kicad_sym",
      "footprint": "cd4556bm.kicad_mod",
      "model_3d": "cd4556bm-hero.glb",
      "model_3d_plain": "cd4556bm-etched.glb",
      "model_3d_step": "cd4556bm-etched.step",
      "model_3d_step_plain": "cd4556bm.step",
      "lbr": "cd4556bm.lbr"
    },
    "distributor_links": {
      "lcsc": "C32710656",
      "digikey": "296-32937-5-ND",
      "mouser": "595-CD4556BM"
    },
    "distributor_check": {
      "checked_at": "2026-10-20T17:40:30Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-32937-5-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "595-CD4556BM",
        "status": "found",
        "lifecycle": "Obsolete"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "EA",
        "type": "input",
        "description": "Enable input for decoder A; per the function table, when EA is HIGH all outputs O0A-O3A are HIGH regardless of the address inputs."
      },
      {
        "number": "2",
        "name": "A0A",
        "type": "input",
        "description": "Address input (A0) for decoder A, selecting which of outputs O0A-O3A goes LOW when EA is LOW."
      },
      {
        "number": "3",
        "name": "A1A",
        "type": "input",
        "description": "Address input (A1) for decoder A, selecting which of outputs O0A-O3A goes LOW when EA is LOW."
      },
      {
        "number": "4",
        "name": "O0A",
        "type": "output",
        "description": "Decoder A output 0, active LOW; it is driven LOW when EA is LOW and A1A/A0A select 0 (A1=L, A0=L)."
      },
      {
        "number": "5",
        "name": "O1A",
        "type": "output",
        "description": "Decoder A output 1, active LOW; it is driven LOW when EA is LOW and A1A/A0A select 1 (A1=L, A0=H)."
      },
      {
        "number": "6",
        "name": "O2A",
        "type": "output",
        "description": "Decoder A output 2, active LOW; it is driven LOW when EA is LOW and A1A/A0A select 2 (A1=H, A0=L)."
      },
      {
        "number": "7",
        "name": "O3A",
        "type": "output",
        "description": "Decoder A output 3, active LOW; it is driven LOW when EA is LOW and A1A/A0A select 3 (A1=H, A0=H)."
      },
      {
        "number": "8",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground supply voltage; all voltages in the datasheet are referenced to VSS (0 V)."
      },
      {
        "number": "9",
        "name": "O3B",
        "type": "output",
        "description": "Decoder B output 3, active LOW; it is driven LOW when EB is LOW and A1B/A0B select 3 (A1=H, A0=H)."
      },
      {
        "number": "10",
        "name": "O2B",
        "type": "output",
        "description": "Decoder B output 2, active LOW; it is driven LOW when EB is LOW and A1B/A0B select 2 (A1=H, A0=L)."
      },
      {
        "number": "11",
        "name": "O1B",
        "type": "output",
        "description": "Decoder B output 1, active LOW; it is driven LOW when EB is LOW and A1B/A0B select 1 (A1=L, A0=H)."
      },
      {
        "number": "12",
        "name": "O0B",
        "type": "output",
        "description": "Decoder B output 0, active LOW; it is driven LOW when EB is LOW and A1B/A0B select 0 (A1=L, A0=L)."
      },
      {
        "number": "13",
        "name": "A1B",
        "type": "input",
        "description": "Address input (A1) for decoder B, selecting which of outputs O0B-O3B goes LOW when EB is LOW."
      },
      {
        "number": "14",
        "name": "A0B",
        "type": "input",
        "description": "Address input (A0) for decoder B, selecting which of outputs O0B-O3B goes LOW when EB is LOW."
      },
      {
        "number": "15",
        "name": "EB",
        "type": "input",
        "description": "Enable input for decoder B; per the function table, when EB is HIGH all outputs O0B-O3B are HIGH regardless of the address inputs."
      },
      {
        "number": "16",
        "name": "VDD",
        "type": "power_in",
        "description": "Supply voltage; recommended operating range is 3 V to 15 V, with an absolute maximum of 18 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 diagram on page 4 has garbled text layout; the pin numbering and names were ta; The ordering table on page 3 is garbled. CD4556BM is listed alongside the SOP16 packaging entries (1; Pin descriptions are short in the datasheet (for example, 'enable input', 'address input'). The acti"
        ],
        "pages_sent": 14,
        "cost_usd": 0.0466,
        "at": "2026-10-20T17:38:56"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603388814350307328",
        "pages": 14,
        "sha256": "d15c2f194bbc8c74",
        "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": "cd4556bm.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          9.9,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "d5eeddb4c0b304dc61950919b126fc61d7586abd5f16ab71a2a79759ec6498bf",
        "checked": "2026-10-20",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "cd4556bm-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          9.9,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "786c4b0da4f5bc11ff4fbcb5a63c9984a8e44c5fb29bb2d09ed7f48da2744c8c",
        "checked": "2026-10-20",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}