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Ray Set visibility: public cb4ab50 5d ago
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{
  "schema_version": 1,
  "type": "component",
  "slug": "74vhct240aft",
  "title": "74VHCT240AFT",
  "brief": "TOSHIBA Buffers, Drivers, Receivers, Transceivers, TSSOP-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": [
    "component",
    "logic",
    "74vhct240aft",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "74VHCT240AFT",
    "manufacturer": "TOSHIBA",
    "package": "TSSOP-20",
    "pin_count": 20,
    "category": "Logic",
    "subcategory": "Buffers, Drivers, Receivers, Transceivers",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/f4e6994349f1dc2095b8b671d9519bb0.pdf",
    "parts": {
      "symbol": "74vhct240aft.kicad_sym",
      "footprint": "74vhct240aft.kicad_mod",
      "model_3d": "74vhct240aft-hero.glb",
      "model_3d_plain": "74vhct240aft-etched.glb",
      "model_3d_step": "74vhct240aft-etched.step",
      "model_3d_step_plain": "74vhct240aft.step",
      "lbr": "74vhct240aft.lbr"
    },
    "distributor_links": {
      "lcsc": "C2676086",
      "digikey": "74VHCT240AFTTR-ND",
      "mouser": "757-74VHCT240AFT"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T06:24:14Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "74VHCT240AFTTR-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "757-74VHCT240AFT",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "1G",
        "type": "input",
        "description": "Active-low 3-state output enable for the first buffer group (1A1-1A4 to 1Y1-1Y4); inputs 0 to 5.5 V, VIH 2.0 V min, VIL 0.8 V max."
      },
      {
        "number": "2",
        "name": "1A1",
        "type": "input",
        "description": "Data input 1A1 of group 1, inverted to output 1Y1; TTL-compatible with VIH 2.0 V min and VIL 0.8 V max."
      },
      {
        "number": "3",
        "name": "2Y4",
        "type": "tri_state",
        "description": "Inverting 3-state output of group 2 driven from 2A4; high impedance when 2G is high."
      },
      {
        "number": "4",
        "name": "1A2",
        "type": "input",
        "description": "Data input 1A2 of group 1, inverted to output 1Y2; TTL-compatible with VIH 2.0 V min and VIL 0.8 V max."
      },
      {
        "number": "5",
        "name": "2Y3",
        "type": "tri_state",
        "description": "Inverting 3-state output of group 2 driven from 2A3; high impedance when 2G is high."
      },
      {
        "number": "6",
        "name": "1A3",
        "type": "input",
        "description": "Data input 1A3 of group 1, inverted to output 1Y3; TTL-compatible with VIH 2.0 V min and VIL 0.8 V max."
      },
      {
        "number": "7",
        "name": "2Y2",
        "type": "tri_state",
        "description": "Inverting 3-state output of group 2 driven from 2A2; high impedance when 2G is high."
      },
      {
        "number": "8",
        "name": "1A4",
        "type": "input",
        "description": "Data input 1A4 of group 1, inverted to output 1Y4; TTL-compatible with VIH 2.0 V min and VIL 0.8 V max."
      },
      {
        "number": "9",
        "name": "2Y1",
        "type": "tri_state",
        "description": "Inverting 3-state output of group 2 driven from 2A1; high impedance when 2G is high."
      },
      {
        "number": "10",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin (0 V)."
      },
      {
        "number": "11",
        "name": "2A1",
        "type": "input",
        "description": "Data input 2A1 of group 2, inverted to output 2Y1; TTL-compatible with VIH 2.0 V min and VIL 0.8 V max."
      },
      {
        "number": "12",
        "name": "1Y4",
        "type": "tri_state",
        "description": "Inverting 3-state output of group 1 driven from 1A4; high impedance when 1G is high."
      },
      {
        "number": "13",
        "name": "2A2",
        "type": "input",
        "description": "Data input 2A2 of group 2, inverted to output 2Y2; TTL-compatible with VIH 2.0 V min and VIL 0.8 V max."
      },
      {
        "number": "14",
        "name": "1Y3",
        "type": "tri_state",
        "description": "Inverting 3-state output of group 1 driven from 1A3; high impedance when 1G is high."
      },
      {
        "number": "15",
        "name": "2A3",
        "type": "input",
        "description": "Data input 2A3 of group 2, inverted to output 2Y3; TTL-compatible with VIH 2.0 V min and VIL 0.8 V max."
      },
      {
        "number": "16",
        "name": "1Y2",
        "type": "tri_state",
        "description": "Inverting 3-state output of group 1 driven from 1A2; high impedance when 1G is high."
      },
      {
        "number": "17",
        "name": "2A4",
        "type": "input",
        "description": "Data input 2A4 of group 2, inverted to output 2Y4; TTL-compatible with VIH 2.0 V min and VIL 0.8 V max."
      },
      {
        "number": "18",
        "name": "1Y1",
        "type": "tri_state",
        "description": "Inverting 3-state output of group 1 driven from 1A1; high impedance when 1G is high."
      },
      {
        "number": "19",
        "name": "2G",
        "type": "input",
        "description": "Active-low 3-state output enable for the second buffer group (2A1-2A4 to 2Y1-2Y4); inputs 0 to 5.5 V, VIH 2.0 V min, VIL 0.8 V max."
      },
      {
        "number": "20",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply voltage pin, operating range 4.5 to 5.5 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": [
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 9,
        "cost_usd": 0.2902,
        "at": "2026-10-18T06:19:01"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/f4e6994349f1dc2095b8b671d9519bb0.pdf",
        "pages": 9,
        "sha256": "3e200ea129a9f3ca",
        "source_tier": "mfr"
      },
      "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"
    },
    "models_3d": [
      {
        "file": "74vhct240aft.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.4,
          6.5,
          1.2
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "97339947f3a7196470ec2f1d9f9b92bb2fc2ab66ad53be0cf105192585ef3c9a",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "74vhct240aft-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.4,
          6.5,
          1.2
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "20af7662fa9454f942dd64ef709baabba8aa3ae6e7c89856bfc64d5247750002",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "TOSHIBA",
      "Package": "TSSOP-20",
      "Category": "Logic",
      "Pins": "20"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "3e200ea129a9f3ca14d69799baa1de092dd37f71b22dba46bd6c53215b179fed",
      "rows": [
        {
          "name": "High-level input voltage",
          "symbol": "VIH",
          "kind": "electrical",
          "unit": "V",
          "min": 2,
          "typ": null,
          "max": null,
          "conditions": "VCC = 4.5 to 5.5 V, Ta = 25 C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Low-level input voltage",
          "symbol": "VIL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.8,
          "conditions": "VCC = 4.5 to 5.5 V, Ta = 25 C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "High-level output voltage",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": 4.4,
          "typ": 4.5,
          "max": null,
          "conditions": "VIN = VIH or VIL, IOH = -50 uA, VCC = 4.5 V, Ta = 25 C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "High-level output voltage",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": 3.94,
          "typ": null,
          "max": null,
          "conditions": "VIN = VIH or VIL, IOH = -8 mA, VCC = 4.5 V, Ta = 25 C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Low-level output voltage",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 0,
          "max": 0.1,
          "conditions": "VIN = VIH or VIL, IOL = 50 uA, VCC = 4.5 V, Ta = 25 C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Low-level output voltage",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.36,
          "conditions": "VIN = VIH or VIL, IOL = 8 mA, VCC = 4.5 V, Ta = 25 C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "3-state output OFF-state leakage current",
          "symbol": "IOZ",
          "kind": "electrical",
          "unit": "uA",
          "min": -0.25,
          "typ": null,
          "max": 0.25,
          "conditions": "VIN = VIH or VIL, VOUT = VCC or GND, Ta = 25 C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Input leakage current",
          "symbol": "IIN",
          "kind": "electrical",
          "unit": "uA",
          "min": -0.1,
          "typ": null,
          "max": 0.1,
          "conditions": "VIN = 5.5 V or GND, Ta = 25 C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Quiescent supply current",
          "symbol": "ICC",
          "kind": "electrical",
          "unit": "uA",
          "min": null,
          "typ": null,
          "max": 4,
          "conditions": "VIN = VCC or GND, Ta = 25 C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Quiescent supply current (per input)",
          "symbol": "ICCT",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 1.35,
          "conditions": "Per input: VIN = 3.4 V, other input VCC or GND, Ta = 25 C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Output leakage current (Power-OFF)",
          "symbol": "IOPD",
          "kind": "electrical",
          "unit": "uA",
          "min": null,
          "typ": null,
          "max": 0.5,
          "conditions": "VOUT = 5.5 V, Ta = 25 C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "High-level output voltage",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": 4.4,
          "typ": null,
          "max": null,
          "conditions": "VIN = VIH or VIL, IOH = -50 uA, VCC = 4.5 V, Ta = -40 to 85 C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "High-level output voltage",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": 3.8,
          "typ": null,
          "max": null,
          "conditions": "VIN = VIH or VIL, IOH = -8 mA, VCC = 4.5 V, Ta = -40 to 85 C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Low-level output voltage",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.1,
          "conditions": "VIN = VIH or VIL, IOL = 50 uA, VCC = 4.5 V, Ta = -40 to 85 C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Low-level output voltage",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.44,
          "conditions": "VIN = VIH or VIL, IOL = 8 mA, VCC = 4.5 V, Ta = -40 to 85 C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "3-state output OFF-state leakage current",
          "symbol": "IOZ",
          "kind": "electrical",
          "unit": "uA",
          "min": -2.5,
          "typ": null,
          "max": 2.5,
          "conditions": "VIN = VIH or VIL, VOUT = VCC or GND, Ta = -40 to 85 C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Input leakage current",
          "symbol": "IIN",
          "kind": "electrical",
          "unit": "uA",
          "min": -1,
          "typ": null,
          "max": 1,
          "conditions": "VIN = 5.5 V or GND, Ta = -40 to 85 C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Quiescent supply current",
          "symbol": "ICC",
          "kind": "electrical",
          "unit": "uA",
          "min": null,
          "typ": null,
          "max": 40,
          "conditions": "VIN = VCC or GND, Ta = -40 to 85 C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Quiescent supply current (per input)",
          "symbol": "ICCT",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 1.5,
          "conditions": "Per input: VIN = 3.4 V, other input VCC or GND, Ta = -40 to 85 C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Output leakage current (Power-OFF)",
          "symbol": "IOPD",
          "kind": "electrical",
          "unit": "uA",
          "min": null,
          "typ": null,
          "max": 5,
          "conditions": "VOUT = 5.5 V, Ta = -40 to 85 C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "High-level output voltage",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": 3.7,
          "typ": null,
          "max": null,
          "conditions": "VIN = VIH or VIL, IOH = -8 mA, VCC = 4.5 V, Ta = -40 to 125 C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Low-level output voltage",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.55,
          "conditions": "VIN = VIH or VIL, IOL = 8 mA, VCC = 4.5 V, Ta = -40 to 125 C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "3-state output OFF-state leakage current",
          "symbol": "IOZ",
          "kind": "electrical",
          "unit": "uA",
          "min": -10,
          "typ": null,
          "max": 10,
          "conditions": "VIN = VIH or VIL, VOUT = VCC or GND, Ta = -40 to 125 C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Input leakage current",
          "symbol": "IIN",
          "kind": "electrical",
          "unit": "uA",
          "min": -2,
          "typ": null,
          "max": 2,
          "conditions": "VIN = 5.5 V or GND, Ta = -40 to 125 C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Quiescent supply current",
          "symbol": "ICC",
          "kind": "electrical",
          "unit": "uA",
          "min": null,
          "typ": null,
          "max": 80,
          "conditions": "VIN = VCC or GND, Ta = -40 to 125 C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Output leakage current (Power-OFF)",
          "symbol": "IOPD",
          "kind": "electrical",
          "unit": "uA",
          "min": null,
          "typ": null,
          "max": 20,
          "conditions": "VOUT = 5.5 V, Ta = -40 to 125 C",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Propagation delay time (74VHCT240AFT)",
          "symbol": "tPLH,tPHL",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 5.6,
          "max": 7.8,
          "conditions": "Ta = 25 C, VCC = 5.0 +/- 0.5 V, CL = 15 pF, RL = 1 kOhm",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Propagation delay time (74VHCT240AFT)",
          "symbol": "tPLH,tPHL",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 6.1,
          "max": 8.8,
          "conditions": "Ta = 25 C, VCC = 5.0 +/- 0.5 V, CL = 50 pF, RL = 1 kOhm",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Propagation delay time (74VHCT240AFT)",
          "symbol": "tPLH,tPHL",
          "kind": "timing",
          "unit": "ns",
          "min": 1,
          "typ": null,
          "max": 9,
          "conditions": "Ta = -40 to 85 C, VCC = 5.0 +/- 0.5 V, CL = 15 pF, RL = 1 kOhm",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Propagation delay time (74VHCT240AFT)",
          "symbol": "tPLH,tPHL",
          "kind": "timing",
          "unit": "ns",
          "min": 1,
          "typ": null,
          "max": 10,
          "conditions": "Ta = -40 to 85 C, VCC = 5.0 +/- 0.5 V, CL = 50 pF, RL = 1 kOhm",
          "source_page": 6,
          "source": "datasheet"
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