74VHC21FT

{
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  "slug": "74vhc21ft",
  "title": "74VHC21FT",
  "brief": "TOSHIBA Logic Gates, TSSOP-14-175mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
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    "mpn": "74VHC21FT",
    "manufacturer": "TOSHIBA",
    "package": "TSSOP-14-175mil",
    "pin_count": 14,
    "category": "Logic",
    "subcategory": "Logic Gates",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/31fb7493e9abc355b7183bdeb227105d.pdf",
    "parts": {
      "symbol": "74vhc21ft.kicad_sym",
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      "model_3d_step_plain": "74vhc21ft.step",
      "lbr": "74vhc21ft.lbr"
    },
    "distributor_links": {
      "lcsc": "C4470883",
      "digikey": "74VHC21FTTR-ND",
      "mouser": "757-74VHC21FT"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T04:30:08Z",
      "source": "Component Ocean /api/assign-pns",
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    "pins": [
      {
        "number": "1",
        "name": "1A",
        "type": "input",
        "description": "Gate 1 input A; inputs accept 0 to 5.5 V regardless of supply voltage, and unused inputs must be tied to VCC or GND."
      },
      {
        "number": "2",
        "name": "1B",
        "type": "input",
        "description": "Gate 1 input B; accepts 0 to 5.5 V and must be tied to VCC or GND if unused."
      },
      {
        "number": "3",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection."
      },
      {
        "number": "4",
        "name": "1C",
        "type": "input",
        "description": "Gate 1 input C; accepts 0 to 5.5 V and must be tied to VCC or GND if unused."
      },
      {
        "number": "5",
        "name": "1D",
        "type": "input",
        "description": "Gate 1 input D; accepts 0 to 5.5 V and must be tied to VCC or GND if unused."
      },
      {
        "number": "6",
        "name": "1Y",
        "type": "output",
        "description": "Gate 1 AND output (high only when 1A, 1B, 1C and 1D are all high), with buffered output stage."
      },
      {
        "number": "7",
        "name": "GND",
        "type": "power_in",
        "description": "Ground (0 V) reference."
      },
      {
        "number": "8",
        "name": "2Y",
        "type": "output",
        "description": "Gate 2 AND output (high only when 2A, 2B, 2C and 2D are all high), with buffered output stage."
      },
      {
        "number": "9",
        "name": "2A",
        "type": "input",
        "description": "Gate 2 input A; accepts 0 to 5.5 V and must be tied to VCC or GND if unused."
      },
      {
        "number": "10",
        "name": "2B",
        "type": "input",
        "description": "Gate 2 input B; accepts 0 to 5.5 V and must be tied to VCC or GND if unused."
      },
      {
        "number": "11",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection."
      },
      {
        "number": "12",
        "name": "2C",
        "type": "input",
        "description": "Gate 2 input C; accepts 0 to 5.5 V and must be tied to VCC or GND if unused."
      },
      {
        "number": "13",
        "name": "2D",
        "type": "input",
        "description": "Gate 2 input D; accepts 0 to 5.5 V and must be tied to VCC or GND if unused."
      },
      {
        "number": "14",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply, operating range 2.0 V to 5.5 V (absolute maximum -0.5 to 7.0 V)."
      }
    ],
    "provenance": {
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        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Package is TSSOP14B per datasheet; the 175 mil width hint is not stated in the text, and the dimensi",
          "vision extraction: provenance cannot be text-verified; needs consensus"
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        "pages_sent": 7,
        "cost_usd": 0.2314,
        "at": "2026-10-18T04:27:11"
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        "pages": 7,
        "sha256": "24ef6f9c8328ac56",
        "source_tier": "mfr"
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      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 14,
        "described": 14,
        "cites_pages": true,
        "refuses_to_fabricate": true
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  "metadata": {
    "specs": {
      "Manufacturer": "TOSHIBA",
      "Package": "TSSOP-14-175mil",
      "Category": "Logic",
      "Pins": "14"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
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      "rows": [
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          "name": "Supply voltage",
          "symbol": "VCC",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 2,
          "typ": null,
          "max": 5.5,
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        {
          "name": "Input voltage",
          "symbol": "VIN",
          "kind": "recommended_operating",
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        {
          "name": "Output voltage",
          "symbol": "VOUT",
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        {
          "name": "Operating temperature",
          "symbol": "Topr",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
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        {
          "name": "Supply voltage",
          "symbol": "VCC",
          "kind": "absolute_maximum",
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          "min": -0.5,
          "typ": null,
          "max": 7,
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        {
          "name": "Input voltage",
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        {
          "name": "Input diode current",
          "symbol": "IIK",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": -20,
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        {
          "name": "Output diode current",
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          "name": "Output current",
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          "kind": "absolute_maximum",
          "unit": "mA",
          "min": -25,
          "typ": null,
          "max": 25,
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        {
          "name": "VCC/ground current",
          "symbol": "ICC",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": -50,
          "typ": null,
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          "conditions": "",
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        },
        {
          "name": "Power dissipation",
          "symbol": "PD",
          "kind": "absolute_maximum",
          "unit": "mW",
          "min": null,
          "typ": null,
          "max": 180,
          "conditions": "Ta = -40 to 85 °C (Note 1)",
          "source_page": 3,
          "source": "datasheet"
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        {
          "name": "Storage temperature",
          "symbol": "Tstg",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
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          "name": "High-level input voltage",
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          "conditions": "VCC = 2.0 V; Ta = 25 °C",
          "source_page": 4,
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          "name": "Low-level input voltage",
          "symbol": "VIL",
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          "name": "High-level output voltage",
          "symbol": "VOH",
          "kind": "electrical",
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          "min": 1.9,
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          "source_page": 4,
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          "name": "High-level output voltage",
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        {
          "name": "High-level output voltage",
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        {
          "name": "High-level output voltage",
          "symbol": "VOH",
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          "min": 2.58,
          "typ": null,
          "max": null,
          "conditions": "IOH = -4 mA; VCC = 3.0 V; Ta = 25 °C",
          "source_page": 4,
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        {
          "name": "High-level output voltage",
          "symbol": "VOH",
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          "min": 3.94,
          "typ": null,
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          "conditions": "IOH = -8 mA; VCC = 4.5 V; Ta = 25 °C",
          "source_page": 4,
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        {
          "name": "Low-level output voltage",
          "symbol": "VOL",
          "kind": "electrical",
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          "min": null,
          "typ": null,
          "max": 0.1,
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          "source_page": 4,
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        {
          "name": "Low-level output voltage",
          "symbol": "VOL",
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          "max": 0.36,
          "conditions": "IOL = 4 mA; VCC = 3.0 V; Ta = 25 °C",
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        {
          "name": "Input leakage current",
          "symbol": "IIN",
          "kind": "electrical",
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          "min": -0.1,
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          "conditions": "VIN = 5.5 V or GND; VCC = 0 to 5.5 V; Ta = 25 °C",
          "source_page": 4,
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        {
          "name": "Quiescent supply current",
          "symbol": "ICC",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": null,
          "max": 2,
          "conditions": "VIN = VCC or GND; VCC = 5.5 V; Ta = 25 °C",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "High-level output voltage",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": 2.48,
          "typ": null,
          "max": null,
          "conditions": "IOH = -4 mA; VCC = 3.0 V; Ta = -40 to 85 °C",
          "source_page": 4,
          "source": "datasheet"
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        {
          "name": "High-level output voltage",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": 3.8,
          "typ": null,
          "max": null,
          "conditions": "IOH = -8 mA; VCC = 4.5 V; Ta = -40 to 85 °C",
          "source_page": 4,
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          "name": "Low-level output voltage",
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          "name": "Input leakage current",
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          "unit": "µA",
          "min": -1,
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          "name": "High-level input voltage",
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          "typ": null,
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          "conditions": "VCC = 2.0 V; Ta = -40 to 125 °C",
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          "name": "Low-level input voltage",
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          "conditions": "VCC = 2.0 V; Ta = -40 to 125 °C",
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          "name": "High-level output voltage",
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          "typ": null,
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          "conditions": "IOH = -50 µA; VCC = 2.0 V; Ta = -40 to 125 °C",
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          "name": "High-level output voltage",
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          "conditions": "IOH = -50 µA; VCC = 3.0 V; Ta = -40 to 125 °C",
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          "name": "High-level output voltage",
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          "typ": null,
          "max": null,
          "conditions": "IOH = -50 µA; VCC = 4.5 V; Ta = -40 to 125 °C",
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          "name": "High-level output voltage",
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          "conditions": "IOH = -4 mA; VCC = 3.0 V; Ta = -40 to 125 °C",
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          "name": "High-level output voltage",
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          "min": 3.7,
          "typ": null,
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          "conditions": "IOH = -8 mA; VCC = 4.5 V; Ta = -40 to 125 °C",
          "source_page": 5,
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          "name": "Low-level output voltage",
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          "max": 0.1,
          "conditions": "IOL = 50 µA; VCC = 2.0 V; Ta = -40 to 125 °C",
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          "name": "Low-level output voltage",
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          "conditions": "IOL = 4 mA; VCC = 3.0 V; Ta = -40 to 125 °C",
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          "name": "Input leakage current",
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          "unit": "µA",
          "min": -2,
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          "max": 40,
          "conditions": "VIN = VCC or GND; VCC = 5.5 V; Ta = -40 to 125 °C",
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          "conditions": "VCC = 3.3 ±0.3 V; CL = 15 pF; Ta = -40 to 125 °C; tr = tf = 3 ns",
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          "name": "Propagation delay time",
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          "conditions": "VCC = 3.3 ±0.3 V; CL = 50 pF; Ta = -40 to 125 °C; tr = tf = 3 ns",
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          "conditions": "VCC = 5.0 ±0.5 V; CL = 15 pF; Ta = -40 to 125 °C; tr = tf = 3 ns",
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          "name": "Propagation delay time",
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          "name": "Input capacitance",
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    "email": "[email protected]"
  },
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}