SN74HC157DBR

{
  "slug": "sn74hc157dbr",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments Signal Switches, Multiplexers, Decoders, SSOP-16-208mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "logic",
    "sn74hc157dbr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "sn74hc157dbr.kicad_sym",
    "sn74hc157dbr.kicad_mod",
    "sn74hc157dbr.glb",
    "sn74hc157dbr.step",
    "sn74hc157dbr.lbr",
    "docs/hero.png",
    "docs/sn74hc157dbr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "sn74hc157dbr-hero.glb",
    "sn74hc157dbr-hero.overlay.json"
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  "component": {
    "mpn": "SN74HC157DBR",
    "manufacturer": "Texas Instruments",
    "package": "SSOP-16-208mil",
    "pin_count": 16,
    "category": "Logic",
    "subcategory": "Signal Switches, Multiplexers, Decoders",
    "datasheet": "https://www.ti.com/cn/lit/gpn/sn74hc157",
    "parts": {
      "symbol": "sn74hc157dbr.kicad_sym",
      "footprint": "sn74hc157dbr.kicad_mod",
      "model_3d": "sn74hc157dbr-hero.glb",
      "model_3d_plain": "sn74hc157dbr.glb",
      "model_3d_step": "sn74hc157dbr-etched.step",
      "model_3d_step_plain": "sn74hc157dbr.step",
      "lbr": "sn74hc157dbr.lbr"
    },
    "distributor_links": {
      "lcsc": "C2675066",
      "digikey": "296-38795-2-ND",
      "mouser": "595-SN74HC157DBR"
    },
    "distributor_check": {
      "checked_at": "2026-10-05T23:43:31Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-38795-2-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "595-SN74HC157DBR",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "A/B",
        "type": "input",
        "description": "Address select input for choosing between data sources A or B for all four channels"
      },
      {
        "number": "2",
        "name": "1A",
        "type": "input",
        "description": "Channel 1 data input A"
      },
      {
        "number": "3",
        "name": "1B",
        "type": "input",
        "description": "Channel 1 data input B"
      },
      {
        "number": "4",
        "name": "1Y",
        "type": "output",
        "description": "Channel 1 data output, equals selected input A or B per A/B control"
      },
      {
        "number": "5",
        "name": "2A",
        "type": "input",
        "description": "Channel 2 data input A"
      },
      {
        "number": "6",
        "name": "2B",
        "type": "input",
        "description": "Channel 2 data input B"
      },
      {
        "number": "7",
        "name": "2Y",
        "type": "output",
        "description": "Channel 2 data output, equals selected input A or B per A/B control"
      },
      {
        "number": "8",
        "name": "GND",
        "type": "power_in",
        "description": "Ground connection"
      },
      {
        "number": "9",
        "name": "3Y",
        "type": "output",
        "description": "Channel 3 data output, equals selected input A or B per A/B control"
      },
      {
        "number": "10",
        "name": "3B",
        "type": "input",
        "description": "Channel 3 data input B"
      },
      {
        "number": "11",
        "name": "3A",
        "type": "input",
        "description": "Channel 3 data input A"
      },
      {
        "number": "12",
        "name": "4Y",
        "type": "output",
        "description": "Channel 4 data output, equals selected input A or B per A/B control"
      },
      {
        "number": "13",
        "name": "4B",
        "type": "input",
        "description": "Channel 4 data input B"
      },
      {
        "number": "14",
        "name": "4A",
        "type": "input",
        "description": "Channel 4 data input A"
      },
      {
        "number": "15",
        "name": "G",
        "type": "input",
        "description": "Output strobe/enable input, forces all Y outputs to low level when high to disable outputs"
      },
      {
        "number": "16",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive power supply, recommended 2V to 6V operating range"
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-4-5-20251001",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Pin Type column on page 3 contains errors: Pins 4, 7, 9, 12 are listed as Type 'I' (Input) but descr; Pin 15 (G) description states '低电平有效' (active low) but the functional truth table on page 9 shows th"
        ],
        "pages_sent": 37,
        "cost_usd": 0.2124,
        "at": "2026-10-05T23:43:15"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/sn74hc157",
        "pages": 37,
        "sha256": "c525a639e5642b49",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 16,
        "described": 16,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
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      "footprint": "viewers/footprint.html"
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}