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Ray Set visibility: public ee30918 7d ago
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{
  "schema_version": 1,
  "type": "component",
  "slug": "sn74ahct245n",
  "title": "SN74AHCT245N",
  "brief": "Texas Instruments Buffers, Drivers, Receivers, Transceivers, PDIP-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",
    "sn74ahct245n",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "SN74AHCT245N",
    "manufacturer": "Texas Instruments",
    "package": "PDIP-20",
    "pin_count": 20,
    "category": "Logic",
    "subcategory": "Buffers, Drivers, Receivers, Transceivers",
    "datasheet": "https://www.ti.com/cn/lit/gpn/sn74ahct245",
    "parts": {
      "symbol": "sn74ahct245n.kicad_sym",
      "footprint": "sn74ahct245n.kicad_mod",
      "model_3d": "sn74ahct245n-hero.glb",
      "model_3d_plain": "sn74ahct245n-etched.glb",
      "model_3d_step": "sn74ahct245n-etched.step",
      "model_3d_step_plain": "sn74ahct245n.step",
      "lbr": "sn74ahct245n.lbr"
    },
    "distributor_links": {
      "lcsc": "C1548096",
      "digikey": "2156-SN74AHCT245N-ND",
      "mouser": "595-SN74AHCT245N"
    },
    "distributor_check": {
      "checked_at": "2026-10-16T02:38:36Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "2156-SN74AHCT245N-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "595-SN74AHCT245N",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "DIR",
        "type": "input",
        "description": "Direction pin (type I) that sets the transfer direction of the octal bus transceiver; the level-to-direction mapping is in a section not included in this excerpt."
      },
      {
        "number": "2",
        "name": "A1",
        "type": "bidirectional",
        "description": "A1 input/output pin of the octal bus transceiver, a bidirectional data line on the A bus."
      },
      {
        "number": "3",
        "name": "A2",
        "type": "bidirectional",
        "description": "A2 input/output pin of the octal bus transceiver, a bidirectional data line on the A bus."
      },
      {
        "number": "4",
        "name": "A3",
        "type": "bidirectional",
        "description": "A3 input/output pin of the octal bus transceiver, a bidirectional data line on the A bus."
      },
      {
        "number": "5",
        "name": "A4",
        "type": "bidirectional",
        "description": "A4 input/output pin of the octal bus transceiver, a bidirectional data line on the A bus."
      },
      {
        "number": "6",
        "name": "A5",
        "type": "bidirectional",
        "description": "A5 input/output pin of the octal bus transceiver, a bidirectional data line on the A bus."
      },
      {
        "number": "7",
        "name": "A6",
        "type": "bidirectional",
        "description": "A6 input/output pin of the octal bus transceiver, a bidirectional data line on the A bus."
      },
      {
        "number": "8",
        "name": "A7",
        "type": "bidirectional",
        "description": "A7 input/output pin of the octal bus transceiver, a bidirectional data line on the A bus."
      },
      {
        "number": "9",
        "name": "A8",
        "type": "bidirectional",
        "description": "A8 input/output pin of the octal bus transceiver, a bidirectional data line on the A bus."
      },
      {
        "number": "10",
        "name": "GND",
        "type": "power_in",
        "description": "Ground pin for the device."
      },
      {
        "number": "11",
        "name": "B8",
        "type": "bidirectional",
        "description": "B8 input/output pin of the octal bus transceiver, a bidirectional data line on the B bus."
      },
      {
        "number": "12",
        "name": "B7",
        "type": "bidirectional",
        "description": "B7 input/output pin of the octal bus transceiver, a bidirectional data line on the B bus."
      },
      {
        "number": "13",
        "name": "B6",
        "type": "bidirectional",
        "description": "B6 input/output pin of the octal bus transceiver, a bidirectional data line on the B bus."
      },
      {
        "number": "14",
        "name": "B5",
        "type": "bidirectional",
        "description": "B5 input/output pin of the octal bus transceiver, a bidirectional data line on the B bus."
      },
      {
        "number": "15",
        "name": "B4",
        "type": "bidirectional",
        "description": "B4 input/output pin of the octal bus transceiver, a bidirectional data line on the B bus."
      },
      {
        "number": "16",
        "name": "B3",
        "type": "bidirectional",
        "description": "B3 input/output pin of the octal bus transceiver, a bidirectional data line on the B bus."
      },
      {
        "number": "17",
        "name": "B2",
        "type": "bidirectional",
        "description": "B2 input/output pin of the octal bus transceiver, a bidirectional data line on the B bus."
      },
      {
        "number": "18",
        "name": "B1",
        "type": "bidirectional",
        "description": "B1 input/output pin of the octal bus transceiver, a bidirectional data line on the B bus."
      },
      {
        "number": "19",
        "name": "OE",
        "type": "input",
        "description": "Output Enable input that controls the transceiver outputs; the active level is not stated in this excerpt."
      },
      {
        "number": "20",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply pin; the recommended supply range is 4.5 V to 5.5 V (stated on page 4)."
      }
    ],
    "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 numbers and names come from Table 5-1 and the top-view figure 5-1 (shared by the N package and s; The excerpt omits pages 5-11 (thermal data, electrical characteristics, functional modes). The DIR d; The VCC supply range 4.5 V to 5.5 V is printed on page 4 (Recommended Operating Conditions), not on "
        ],
        "pages_sent": 9,
        "cost_usd": 0.056,
        "at": "2026-10-16T02:38:14"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/sn74ahct245",
        "pages": 41,
        "sha256": "0929f5fab514d31a",
        "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"
    },
    "models_3d": [
      {
        "file": "sn74ahct245n.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
          7.874,
          26.162,
          6.98
        ],
        "zmin_mm": -3.3,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "ca359c9b9e0ce94efcb6c96866513f659eef6517d629ace3c4a0a779f6fd57bb",
        "checked": "2026-10-16",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "sn74ahct245n-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
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        "zmin_mm": -3.3,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "e7572744b22670adee36f650f121cdcdc31a373a27b349846cb79a2d83e2af17",
        "checked": "2026-10-16",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "PDIP-20",
      "Category": "Logic",
      "Pins": "20"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "0929f5fab514d31a37bacc7c07f0bd6629d46084219f52c57b6f7d5ccfb6b00e",
      "rows": [
        {
          "name": "Supply voltage",
          "symbol": "VCC",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 4.5,
          "typ": null,
          "max": 5.5,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "High-level input voltage",
          "symbol": "VIH",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 2,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Low-level input voltage",
          "symbol": "VIL",
          "kind": "recommended_operating",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.8,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Input voltage",
          "symbol": "VI",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 0,
          "typ": null,
          "max": 5.5,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Output voltage",
          "symbol": "VO",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 0,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "High-level output current",
          "symbol": "IOH",
          "kind": "recommended_operating",
          "unit": "mA",
          "min": -8,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Low-level output current",
          "symbol": "IOL",
          "kind": "recommended_operating",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 8,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Input transition rise and fall rate",
          "symbol": "Δt/Δv",
          "kind": "recommended_operating",
          "unit": "ns/V",
          "min": null,
          "typ": null,
          "max": 20,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Operating free-air temperature",
          "symbol": "TA",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "SN74AHCT245 –40°C to 125°C",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Supply voltage range",
          "symbol": "VCC",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.5,
          "typ": null,
          "max": 7,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Input voltage range",
          "symbol": "VI",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.5,
          "typ": null,
          "max": 7,
          "conditions": "Control inputs",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Output voltage range",
          "symbol": "VO",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.5,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Input clamp current",
          "symbol": "IIK",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": -20,
          "typ": null,
          "max": null,
          "conditions": "VI < 0; control inputs",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Output clamp current",
          "symbol": "IOK",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": -20,
          "typ": null,
          "max": 20,
          "conditions": "VO < 0 or VO > VCC",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Continuous output current",
          "symbol": "IO",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": -25,
          "typ": null,
          "max": 25,
          "conditions": "VO = 0 to VCC",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Continuous current through VCC or GND",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": -75,
          "typ": null,
          "max": 75,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature",
          "symbol": "Tstg",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "High-level output voltage",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": 4.4,
          "typ": 4.5,
          "max": null,
          "conditions": "IOH = –50 µA; VCC = 4.5 V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "High-level output voltage",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": 3.7,
          "typ": 3.94,
          "max": null,
          "conditions": "IOH = –8 mA; VCC = 4.5 V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Low-level output voltage",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.1,
          "conditions": "IOL = 50 µA; VCC = 4.5 V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Low-level output voltage",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 0.36,
          "max": 0.44,
          "conditions": "IOH = 8 mA; VCC = 4.5 V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Input current (OE or DIR)",
          "symbol": "II",
          "kind": "electrical",
          "unit": "µA",
          "min": -1,
          "typ": null,
          "max": 1,
          "conditions": "VI = 5.5 V or GND; VCC = 0 to 5.5 V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Off-state output current (A or B inputs)",
          "symbol": "IOZ",
          "kind": "electrical",
          "unit": "µA",
          "min": -2.5,
          "typ": null,
          "max": 2.5,
          "conditions": "VO = VCC or GND; VCC = 5.5 V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Quiescent supply current",
          "symbol": "ICC",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 4,
          "max": 40,
          "conditions": "VI = VCC or GND; IO = 0; VCC = 5.5 V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Additional supply current per input",
          "symbol": "ΔICC",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 1.35,
          "max": 1.5,
          "conditions": "One input at 3.4 V, other inputs at VCC or GND; VCC = 5.5 V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Input capacitance (OE or DIR)",
          "symbol": "Ci",
          "kind": "electrical",
          "unit": "pF",
          "min": null,
          "typ": 2.5,
          "max": 10,
          "conditions": "VI = VCC or GND; VCC = 5 V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Input/output capacitance (A or B inputs)",
          "symbol": "Cio",
          "kind": "electrical",
          "unit": "pF",
          "min": null,
          "typ": 4,
          "max": null,
          "conditions": "VI = VCC or GND; VCC = 5 V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Propagation delay A or B to B or A (tPLH)",
          "symbol": "tPLH",
          "kind": "timing",
          "unit": "ns",
          "min": 1,
          "typ": 4.5,
          "max": 10,
          "conditions": "CL = 15 pF; VCC = 5 V ± 0.5 V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Propagation delay A or B to B or A (tPHL)",
          "symbol": "tPHL",
          "kind": "timing",
          "unit": "ns",
          "min": 1,
          "typ": 4.5,
          "max": 10,
          "conditions": "CL = 15 pF; VCC = 5 V ± 0.5 V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Output enable time OE to A or B (tPZH)",
          "symbol": "tPZH",
          "kind": "timing",
          "unit": "ns",
          "min": 1,
          "typ": 8.9,
          "max": 16,
          "conditions": "CL = 15 pF; VCC = 5 V ± 0.5 V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Output enable time OE to A or B (tPZL)",
          "symbol": "tPZL",
          "kind": "timing",
          "unit": "ns",
          "min": 1,
          "typ": 8.9,
          "max": 16,
          "conditions": "CL = 15 pF; VCC = 5 V ± 0.5 V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Output disable time OE to A or B (tPHZ)",
          "symbol": "tPHZ",
          "kind": "timing",
          "unit": "ns",
          "min": 1,
          "typ": 9.2,
          "max": 16.5,
          "conditions": "CL = 15 pF; VCC = 5 V ± 0.5 V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Output disable time OE to A or B (tPLZ)",
          "symbol": "tPLZ",
          "kind": "timing",
          "unit": "ns",
          "min": 1,
          "typ": 9.2,
          "max": 16.5,
          "conditions": "CL = 15 pF; VCC = 5 V ± 0.5 V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Propagation delay A or B to B or A (tPLH)",
          "symbol": "tPLH",
          "kind": "timing",
          "unit": "ns",
          "min": 1,
          "typ": 5.3,
          "max": 11,
          "conditions": "CL = 50 pF; VCC = 5 V ± 0.5 V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Propagation delay A or B to B or A (tPHL)",
          "symbol": "tPHL",
          "kind": "timing",
          "unit": "ns",
          "min": 1,
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