XD74LS157

{
  "schema_version": 1,
  "type": "component",
  "slug": "xd74ls157",
  "title": "XD74LS157",
  "brief": "XINLUDA Signal Switches, Multiplexers, Decoders, DIP-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",
    "xd74ls157",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "XD74LS157",
    "manufacturer": "XINLUDA",
    "package": "DIP-16",
    "pin_count": 16,
    "category": "Logic",
    "subcategory": "Signal Switches, Multiplexers, Decoders",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588917722038620160",
    "parts": {
      "symbol": "xd74ls157.kicad_sym",
      "footprint": "xd74ls157.kicad_mod",
      "model_3d": "xd74ls157-hero.glb",
      "model_3d_plain": "xd74ls157-etched.glb",
      "model_3d_step": "xd74ls157-etched.step",
      "model_3d_step_plain": "xd74ls157.step",
      "lbr": "xd74ls157.lbr"
    },
    "distributor_links": {
      "lcsc": "C707101"
    },
    "distributor_check": {
      "checked_at": "2026-10-16T03:39:44Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "A/B",
        "type": "input",
        "description": "Select input that routes the A inputs to the outputs when low and the B inputs when high."
      },
      {
        "number": "2",
        "name": "1A",
        "type": "input",
        "description": "Data input A of gate 1, selected when A/B is low."
      },
      {
        "number": "3",
        "name": "1B",
        "type": "input",
        "description": "Data input B of gate 1, selected when A/B is high."
      },
      {
        "number": "4",
        "name": "1Y",
        "type": "output",
        "description": "Output of gate 1, which carries true data and is rated for IOL 8 mA and IOH -400 µA."
      },
      {
        "number": "5",
        "name": "2A",
        "type": "input",
        "description": "Data input A of gate 2, selected when A/B is low."
      },
      {
        "number": "6",
        "name": "2B",
        "type": "input",
        "description": "Data input B of gate 2, selected when A/B is high."
      },
      {
        "number": "7",
        "name": "2Y",
        "type": "output",
        "description": "Output of gate 2, which carries true data and is rated for IOL 8 mA and IOH -400 µA."
      },
      {
        "number": "8",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference (0 V)."
      },
      {
        "number": "9",
        "name": "3Y",
        "type": "output",
        "description": "Output of gate 3, which carries true data and is rated for IOL 8 mA and IOH -400 µA."
      },
      {
        "number": "10",
        "name": "3B",
        "type": "input",
        "description": "Data input B of gate 3, selected when A/B is high."
      },
      {
        "number": "11",
        "name": "3A",
        "type": "input",
        "description": "Data input A of gate 3, selected when A/B is low."
      },
      {
        "number": "12",
        "name": "4Y",
        "type": "output",
        "description": "Output of gate 4, which carries true data and is rated for IOL 8 mA and IOH -400 µA."
      },
      {
        "number": "13",
        "name": "4B",
        "type": "input",
        "description": "Data input B of gate 4, selected when A/B is high."
      },
      {
        "number": "14",
        "name": "4A",
        "type": "input",
        "description": "Data input A of gate 4, selected when A/B is low."
      },
      {
        "number": "15",
        "name": "G",
        "type": "input",
        "description": "Strobe input, active low; when high it forces all four outputs low."
      },
      {
        "number": "16",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply voltage, recommended 4.75 V to 5.25 V (5 V nominal), absolute maximum 7 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": [
          "extractor flagged: The G pin description relies on the function table on page 2, where the strobe is labelled 'STROGE'.",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 8,
        "cost_usd": 0.1684,
        "at": "2026-10-16T03:39:26"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588917722038620160",
        "pages": 8,
        "sha256": "13c66c29b4233e5b",
        "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": "xd74ls157.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,
        "footprint_binding": "identity",
        "sha256": "17a30b1f0ab3fd5384a1231e3c63c394888d5b952c542a8c189e023ed3467464",
        "checked": "2026-10-16",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "xd74ls157-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,
        "footprint_binding": "identity",
        "sha256": "555cc94deb89b3738761cbd0e1d89ef33e562da468c7a98af8973df274486038",
        "checked": "2026-10-16",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "XINLUDA",
      "Package": "DIP-16",
      "Category": "Logic",
      "Pins": "16"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "13c66c29b4233e5b26ab1244def7b128597c070ba92377f887cd85ab1ee6388a",
      "rows": [
        {
          "name": "Supply voltage",
          "symbol": "VCC",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 4.75,
          "typ": 5,
          "max": 5.25,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "High-level output current",
          "symbol": "IOH",
          "kind": "recommended_operating",
          "unit": "μA",
          "min": null,
          "typ": null,
          "max": -400,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Low-level output current",
          "symbol": "IOL",
          "kind": "recommended_operating",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 8,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Operating free-air temperature",
          "symbol": "TA",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": 0,
          "typ": null,
          "max": 70,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "High-level input voltage",
          "symbol": "VIH",
          "kind": "electrical",
          "unit": "V",
          "min": 2,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Low-level input voltage",
          "symbol": "VIL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.8,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Input clamp voltage",
          "symbol": "VIK",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": -1.5,
          "conditions": "VCC = MIN, II = −18 mA",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "High-level output voltage",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": 2.7,
          "typ": 3.4,
          "max": null,
          "conditions": "VCC = MIN, VIL = 0.8 V, VIH = 2 V, IOH = −400 μA",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Low-level output voltage",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 0.25,
          "max": 0.4,
          "conditions": "VCC = MIN, VIH = 2 V, VIL = VIL MAX, IOL = 4 mA",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Low-level output voltage",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 0.35,
          "max": 0.5,
          "conditions": "VCC = MIN, VIH = 2 V, VIL = VIL MAX, IOL = 8 mA",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Input current at maximum input voltage (A/B or G)",
          "symbol": "II",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 0.2,
          "conditions": "VCC = MAX, VI = 7 V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Input current at maximum input voltage (A or B)",
          "symbol": "II",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 0.1,
          "conditions": "VCC = MAX, VI = 7 V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "High-level input current (A/B or G)",
          "symbol": "IIH",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": null,
          "max": 40,
          "conditions": "VCC = MAX, VI = 2.7 V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "High-level input current (A or B)",
          "symbol": "IIH",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": null,
          "max": 20,
          "conditions": "VCC = MAX, VI = 2.7 V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Low-level input current (A/B or G)",
          "symbol": "IIL",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": -0.8,
          "conditions": "VCC = MAX, VI = 0.4 V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Low-level input current (A or B)",
          "symbol": "IIL",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": -0.4,
          "conditions": "VCC = MAX, VI = 0.4 V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Short-circuit output current",
          "symbol": "IOS",
          "kind": "electrical",
          "unit": "mA",
          "min": -20,
          "typ": null,
          "max": -100,
          "conditions": "VCC = MAX",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Supply current",
          "symbol": "ICC",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 9.7,
          "max": 16,
          "conditions": "VCC = MAX, Output open, All inputs at 4.5V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Supply voltage",
          "symbol": "VCC",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 7,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Input voltage (74LS157)",
          "symbol": "VI",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 7,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Operating free-air temperature range (DIP package)",
          "symbol": "TA",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": 0,
          "typ": null,
          "max": 70,
          "conditions": "",
          "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": "Propagation delay, low-to-high-level output (Data to output)",
          "symbol": "tPLH",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 9,
          "max": 14,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Propagation delay, high-to-low-level output (Data to output)",
          "symbol": "tPHL",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 9,
          "max": 14,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Propagation delay, low-to-high-level output (Strobe G to output)",
          "symbol": "tPLH",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 13,
          "max": 20,
          "conditions": "CL = 15 pF, RL = 2 k",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Propagation delay, high-to-low-level output (Strobe G to output)",
          "symbol": "tPHL",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 14,
          "max": 21,
          "conditions": "CL = 15 pF, RL = 2 k",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Propagation delay, low-to-high-level output (Select A/B to output)",
          "symbol": "tPLH",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 16,
          "max": 23,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Propagation delay, high-to-low-level output (Select A/B to output)",
          "symbol": "tPHL",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 18,
          "max": 27,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "xd74ls157"
  ],
  "discovery_pitch": "XD74LS157 (XINLUDA) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "xd74ls157.kicad_sym",
    "xd74ls157.kicad_mod",
    "xd74ls157.glb",
    "xd74ls157.step",
    "xd74ls157.lbr",
    "docs/hero.png",
    "docs/xd74ls157-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "xd74ls157-hero.glb",
    "xd74ls157-hero.overlay.json",
    "xd74ls157-etched.glb"
  ],
  "visibility": {
    "public": true
  }
}