SN74CB3Q3345DBQR

{
  "schema_version": 1,
  "type": "component",
  "slug": "sn74cb3q3345dbqr",
  "title": "SN74CB3Q3345DBQR",
  "brief": "Texas Instruments Analog Switches, Multiplexers, QSOP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
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    "interface",
    "sn74cb3q3345dbqr",
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  "component": {
    "mpn": "SN74CB3Q3345DBQR",
    "manufacturer": "Texas Instruments",
    "package": "QSOP-20",
    "pin_count": 20,
    "category": "Interface",
    "subcategory": "Analog Switches, Multiplexers",
    "datasheet": "https://www.ti.com/cn/lit/gpn/sn74cb3q3345",
    "parts": {
      "symbol": "sn74cb3q3345dbqr.kicad_sym",
      "footprint": "sn74cb3q3345dbqr.kicad_mod",
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      "model_3d_plain": "sn74cb3q3345dbqr.glb",
      "model_3d_step": "sn74cb3q3345dbqr-etched.step",
      "model_3d_step_plain": "sn74cb3q3345dbqr.step",
      "lbr": "sn74cb3q3345dbqr.lbr"
    },
    "distributor_links": {
      "lcsc": "C2878922",
      "digikey": "296-19139-2-ND",
      "mouser": "595-SN74CB3Q3345DBQR"
    },
    "distributor_check": {
      "checked_at": "2026-09-26T11:51:27Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-19139-2-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "595-SN74CB3Q3345DBQR",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "OE",
        "type": "input",
        "description": "Active-low control logic input; pulling this pin low connects all switch A side to B side."
      },
      {
        "number": "2",
        "name": "A1",
        "type": "bidirectional",
        "description": "Port A pin 1; can be input or output; supports signals from 0 to 5V."
      },
      {
        "number": "3",
        "name": "A2",
        "type": "bidirectional",
        "description": "Port A pin 2; can be input or output; supports signals from 0 to 5V."
      },
      {
        "number": "4",
        "name": "A3",
        "type": "bidirectional",
        "description": "Port A pin 3; can be input or output; supports signals from 0 to 5V."
      },
      {
        "number": "5",
        "name": "A4",
        "type": "bidirectional",
        "description": "Port A pin 4; can be input or output; supports signals from 0 to 5V."
      },
      {
        "number": "6",
        "name": "A5",
        "type": "bidirectional",
        "description": "Port A pin 5; can be input or output; supports signals from 0 to 5V."
      },
      {
        "number": "7",
        "name": "A6",
        "type": "bidirectional",
        "description": "Port A pin 6; can be input or output; supports signals from 0 to 5V."
      },
      {
        "number": "8",
        "name": "A7",
        "type": "bidirectional",
        "description": "Port A pin 7; can be input or output; supports signals from 0 to 5V."
      },
      {
        "number": "9",
        "name": "A8",
        "type": "bidirectional",
        "description": "Port A pin 8; can be input or output; supports signals from 0 to 5V."
      },
      {
        "number": "10",
        "name": "GND",
        "type": "power_in",
        "description": "Ground (0V) reference."
      },
      {
        "number": "11",
        "name": "B8",
        "type": "bidirectional",
        "description": "Port B pin 8; can be input or output; supports signals from 0 to 5V."
      },
      {
        "number": "12",
        "name": "B7",
        "type": "bidirectional",
        "description": "Port B pin 7; can be input or output; supports signals from 0 to 5V."
      },
      {
        "number": "13",
        "name": "B6",
        "type": "bidirectional",
        "description": "Port B pin 6; can be input or output; supports signals from 0 to 5V."
      },
      {
        "number": "14",
        "name": "B5",
        "type": "bidirectional",
        "description": "Port B pin 5; can be input or output; supports signals from 0 to 5V."
      },
      {
        "number": "15",
        "name": "B4",
        "type": "bidirectional",
        "description": "Port B pin 4; can be input or output; supports signals from 0 to 5V."
      },
      {
        "number": "16",
        "name": "B3",
        "type": "bidirectional",
        "description": "Port B pin 3; can be input or output; supports signals from 0 to 5V."
      },
      {
        "number": "17",
        "name": "B2",
        "type": "bidirectional",
        "description": "Port B pin 2; can be input or output; supports signals from 0 to 5V."
      },
      {
        "number": "18",
        "name": "B1",
        "type": "bidirectional",
        "description": "Port B pin 1; can be input or output; supports signals from 0 to 5V."
      },
      {
        "number": "19",
        "name": "OE",
        "type": "input",
        "description": "Active-high control logic input; pulling this pin high connects all switch A side to B side."
      },
      {
        "number": "20",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive power supply (2.3 to 3.6 V); connect 0.1 to 10 µF decoupling capacitor between VCC and GND."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.2",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.2",
        "primary_model": "claude-haiku-4-5-20251001",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-4-6",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [],
        "pages_sent": 20,
        "cost_usd": 0.2331,
        "at": "2026-09-26T11:51:02"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/sn74cb3q3345",
        "pages": 20,
        "sha256": "b65cc6b2f5126dfe",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 20,
        "described": 20,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    }
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "QSOP-20",
      "Category": "Interface",
      "Pins": "20"
    }
  },
  "variants": [],
  "sections": [
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    "viewers",
    "readme",
    "breadcrumbs",
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  "discovery_triggers": [
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  "discovery_pitch": "SN74CB3Q3345DBQR (Texas Instruments) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
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  "files": [
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    "README.md",
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    "sn74cb3q3345dbqr.step",
    "sn74cb3q3345dbqr.lbr",
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    "docs/sn74cb3q3345dbqr-datasheet.pdf",
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    "viewers/footprint.html"
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  "visibility": {
    "public": true
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}