SN74LV221APWR

{
  "slug": "sn74lv221apwr",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments Monostable Multivibrators, TSSOP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "logic",
    "sn74lv221apwr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "sn74lv221apwr.kicad_sym",
    "sn74lv221apwr.kicad_mod",
    "sn74lv221apwr.glb",
    "sn74lv221apwr.step",
    "sn74lv221apwr.lbr",
    "docs/hero.png",
    "docs/sn74lv221apwr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "sn74lv221apwr-hero.glb",
    "sn74lv221apwr-hero.overlay.json"
  ],
  "component": {
    "mpn": "SN74LV221APWR",
    "manufacturer": "Texas Instruments",
    "package": "TSSOP-16",
    "pin_count": 16,
    "category": "Logic",
    "subcategory": "Monostable Multivibrators",
    "datasheet": "https://www.ti.com/lit/ds/symlink/sn74lv221a.pdf",
    "parts": {
      "symbol": "sn74lv221apwr.kicad_sym",
      "footprint": "sn74lv221apwr.kicad_mod",
      "model_3d": "sn74lv221apwr-hero.glb",
      "model_3d_plain": "sn74lv221apwr.glb",
      "model_3d_step": "sn74lv221apwr-etched.step",
      "model_3d_step_plain": "sn74lv221apwr.step",
      "lbr": "sn74lv221apwr.lbr"
    },
    "distributor_links": {
      "lcsc": "C2860850",
      "digikey": "296-31869-2-ND",
      "mouser": "595-SN74LV221APWR"
    },
    "distributor_check": {
      "checked_at": "2026-10-07T23:59:38Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-31869-2-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "595-SN74LV221APWR",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "1A",
        "type": "input",
        "description": "Channel 1 falling-edge trigger input when 1B is high; hold low when using the other input methods."
      },
      {
        "number": "2",
        "name": "1B",
        "type": "input",
        "description": "Channel 1 rising-edge trigger input when 1A is low; hold high when using the other input methods."
      },
      {
        "number": "3",
        "name": "1CLR",
        "type": "input",
        "description": "Channel 1 clear input: a rising edge triggers when 1A is low and 1B is high, and driving it low during the output pulse cuts the pulse short; hold high for other input methods."
      },
      {
        "number": "4",
        "name": "~{1Q}",
        "type": "output",
        "description": "Channel 1 inverted output of the monostable multivibrator."
      },
      {
        "number": "5",
        "name": "2Q",
        "type": "output",
        "description": "Channel 2 output of the monostable multivibrator."
      },
      {
        "number": "6",
        "name": "2Cext",
        "type": "passive",
        "description": "Channel 2 external capacitor negative connection; the datasheet lists no electrical type for this pin."
      },
      {
        "number": "7",
        "name": "2Rext/Cext",
        "type": "passive",
        "description": "Channel 2 external capacitor and resistor junction connection, where the timing capacitor connects to Cext and the timing resistor connects to VCC."
      },
      {
        "number": "8",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "9",
        "name": "2A",
        "type": "input",
        "description": "Channel 2 falling-edge trigger input when 2B is high; hold low when using the other input methods."
      },
      {
        "number": "10",
        "name": "2B",
        "type": "input",
        "description": "Channel 2 rising-edge trigger input when 2A is low; hold high when using the other input methods."
      },
      {
        "number": "11",
        "name": "2CLR",
        "type": "input",
        "description": "Channel 2 clear input: a rising edge triggers when 2A is low and 2B is high, and driving it low during the output pulse cuts the pulse short; hold high for other input methods."
      },
      {
        "number": "12",
        "name": "~{2Q}",
        "type": "output",
        "description": "Channel 2 inverted output of the monostable multivibrator."
      },
      {
        "number": "13",
        "name": "1Q",
        "type": "output",
        "description": "Channel 1 output of the monostable multivibrator."
      },
      {
        "number": "14",
        "name": "1Cext",
        "type": "passive",
        "description": "Channel 1 external capacitor negative connection; the datasheet lists no electrical type for this pin."
      },
      {
        "number": "15",
        "name": "1Rext/Cext",
        "type": "passive",
        "description": "Channel 1 external capacitor and resistor junction connection, where the timing capacitor connects to Cext and the timing resistor connects to VCC."
      },
      {
        "number": "16",
        "name": "VCC",
        "type": "power_in",
        "description": "Power supply, 2 V to 5.5 V operation per the recommended operating conditions."
      }
    ],
    "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: Pin table gives no electrical type ('—') for the external capacitor/resistor pins; typed as passive ; Pin names 4 and 12 are printed as '1 Q' and '2 Q' (inverted outputs) and pins 5 and 13 as '2Q' and '; Pin 16 VCC description refers to the 2 V to 5.5 V operating range taken from the Features and Recomm"
        ],
        "pages_sent": 11,
        "cost_usd": 0.0632,
        "at": "2026-10-07T23:59:21"
      },
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/sn74lv221a.pdf",
        "pages": 31,
        "sha256": "8e179f4af7bb64d9",
        "source_tier": "mfr"
      },
      "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": "sn74lv221apwr.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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          5.0,
          1.1
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "6ad5e98224d02a427d9a6b929a28dbc158b9925fba5adec12db05079f1016948",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "sn74lv221apwr-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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          1.1
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "c09b009a97d8e94ff59b88efe87ba9594c0ae24e976e7aabad6266494830e932",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}