SN74AXC8T245PWR

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  "type": "component",
  "slug": "sn74axc8t245pwr",
  "title": "SN74AXC8T245PWR",
  "brief": "Texas Instruments Buffers / Drivers, TSSOP-24. 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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    "logic ics",
    "sn74axc8t245pwr",
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  "component": {
    "mpn": "SN74AXC8T245PWR",
    "manufacturer": "Texas Instruments",
    "package": "TSSOP-24",
    "pin_count": 24,
    "category": "Logic ICs",
    "subcategory": "Buffers / Drivers",
    "datasheet": "https://www.ti.com/lit/ds/symlink/sn74axc8t245.pdf",
    "parts": {
      "symbol": "sn74axc8t245pwr.kicad_sym",
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      "model_3d_step": "sn74axc8t245pwr-etched.step",
      "model_3d_step_plain": "sn74axc8t245pwr.step",
      "lbr": "sn74axc8t245pwr.lbr"
    },
    "distributor_links": {
      "lcsc": "C882718",
      "digikey": "296-48831-2-ND"
    },
    "distributor_check": {
      "checked_at": "2026-10-22T21:33:12Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-48831-2-ND",
        "status": "found"
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      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VCCA",
        "type": "power_in",
        "description": "A-port supply voltage, 0.65V ≤ VCCA ≤ 3.6V."
      },
      {
        "number": "2",
        "name": "DIR1",
        "type": "input",
        "description": "Direction-control signal 1, referenced to VCCA."
      },
      {
        "number": "3",
        "name": "A1",
        "type": "bidirectional",
        "description": "Input/output A1, referenced to VCCA."
      },
      {
        "number": "4",
        "name": "A2",
        "type": "bidirectional",
        "description": "Input/output A2, referenced to VCCA."
      },
      {
        "number": "5",
        "name": "A3",
        "type": "bidirectional",
        "description": "Input/output A3, referenced to VCCA."
      },
      {
        "number": "6",
        "name": "A4",
        "type": "bidirectional",
        "description": "Input/output A4, referenced to VCCA."
      },
      {
        "number": "7",
        "name": "A5",
        "type": "bidirectional",
        "description": "Input/output A5, referenced to VCCA."
      },
      {
        "number": "8",
        "name": "A6",
        "type": "bidirectional",
        "description": "Input/output A6, referenced to VCCA."
      },
      {
        "number": "9",
        "name": "A7",
        "type": "bidirectional",
        "description": "Input/output A7, referenced to VCCA."
      },
      {
        "number": "10",
        "name": "A8",
        "type": "bidirectional",
        "description": "Input/output A8, referenced to VCCA."
      },
      {
        "number": "11",
        "name": "DIR2",
        "type": "input",
        "description": "Direction-control signal 2, referenced to VCCA; tie to GND to maintain backward compatibility with SN74AVC8T245."
      },
      {
        "number": "12",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "13",
        "name": "GND",
        "type": "power_in",
        "description": "Ground."
      },
      {
        "number": "14",
        "name": "B8",
        "type": "bidirectional",
        "description": "Input/output B8, referenced to VCCB."
      },
      {
        "number": "15",
        "name": "B7",
        "type": "bidirectional",
        "description": "Input/output B7, referenced to VCCB."
      },
      {
        "number": "16",
        "name": "B6",
        "type": "bidirectional",
        "description": "Input/output B6, referenced to VCCB."
      },
      {
        "number": "17",
        "name": "B5",
        "type": "bidirectional",
        "description": "Input/output B5, referenced to VCCB."
      },
      {
        "number": "18",
        "name": "B4",
        "type": "bidirectional",
        "description": "Input/output B4, referenced to VCCB."
      },
      {
        "number": "19",
        "name": "B3",
        "type": "bidirectional",
        "description": "Input/output B3, referenced to VCCB."
      },
      {
        "number": "20",
        "name": "B2",
        "type": "bidirectional",
        "description": "Input/output B2, referenced to VCCB."
      },
      {
        "number": "21",
        "name": "B1",
        "type": "bidirectional",
        "description": "Input/output B1, referenced to VCCB."
      },
      {
        "number": "22",
        "name": "OE",
        "type": "input",
        "description": "Output Enable, referenced to VCCA; pull to GND to enable all outputs, pull to VCCA to place all outputs in high-impedance mode."
      },
      {
        "number": "23",
        "name": "VCCB",
        "type": "power_in",
        "description": "B-port supply voltage, 0.65V ≤ VCCB ≤ 3.6V."
      },
      {
        "number": "24",
        "name": "VCCB",
        "type": "power_in",
        "description": "B-port supply voltage, 0.65V ≤ VCCB ≤ 3.6V."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
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        "primary_model": "claude-sonnet-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The PW and RHL pin numbers share one column in Table 4-1, so I used that column for the PW package. "
        ],
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        "cost_usd": 0.0989,
        "at": "2026-10-22T21:32:56"
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      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/sn74axc8t245.pdf",
        "pages": 39,
        "sha256": "6cf4003c438c0546",
        "source_tier": "mfr"
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      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 24,
        "described": 24,
        "cites_pages": true,
        "refuses_to_fabricate": true
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    },
    "viewers": {
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      "footprint": "viewers/footprint.html"
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        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
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        "checked": "2026-10-22",
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  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "TSSOP-24",
      "Category": "Logic ICs",
      "Pins": "24"
    },
    "characteristics": {
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      "source": "datasheet",
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          "unit": "V",
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          "max": 3.6,
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        {
          "name": "Supply voltage VCCB",
          "symbol": "VCCB",
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        {
          "name": "High-level input voltage, data inputs",
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          "conditions": "VCCI = 3V - 3.6V",
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          "conditions": "VCCI = 3V - 3.6V",
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          "name": "Input voltage",
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        {
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        {
          "name": "Input transition rise or fall rate",
          "symbol": "Δt/Δv",
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        {
          "name": "Operating free-air temperature",
          "symbol": "TA",
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          "unit": "°C",
          "min": -40,
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          "conditions": "",
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          "name": "Supply voltage VCCA abs max",
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          "name": "Supply voltage VCCB abs max",
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        {
          "name": "Input voltage, I/O ports A",
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          "kind": "absolute_maximum",
          "unit": "V",
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          "typ": null,
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          "conditions": "A port",
          "source_page": 4,
          "source": "datasheet"
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        {
          "name": "Input voltage, control inputs",
          "symbol": "VI",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.5,
          "typ": null,
          "max": 4.2,
          "conditions": "Control inputs",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Output voltage high-Z or power-off",
          "symbol": "VO",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.5,
          "typ": null,
          "max": 4.2,
          "conditions": "A port or B port",
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          "name": "Output voltage high or low state, A port",
          "symbol": "VO",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.5,
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          "max": 0.2,
          "conditions": "A port, max is VCCA + 0.2",
          "source_page": 4,
          "source": "datasheet"
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        {
          "name": "Input clamp current",
          "symbol": "IIK",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": -50,
          "typ": null,
          "max": null,
          "conditions": "VI < 0",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Output clamp current",
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          "kind": "absolute_maximum",
          "unit": "mA",
          "min": -50,
          "typ": null,
          "max": null,
          "conditions": "VO < 0",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Continuous output current",
          "symbol": "IO",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": -50,
          "typ": null,
          "max": 50,
          "conditions": "",
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        {
          "name": "Continuous current through VCCA, VCCB, or GND",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": -100,
          "typ": null,
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        {
          "name": "Junction temperature",
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          "unit": "°C",
          "min": null,
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          "max": 150,
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        {
          "name": "Storage temperature",
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          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
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        {
          "name": "ESD HBM",
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          "kind": "absolute_maximum",
          "unit": "V",
          "min": -8000,
          "typ": null,
          "max": 8000,
          "conditions": "Human-body model, ANSI/ESDA/JEDEC JS-001",
          "source_page": 4,
          "source": "datasheet"
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        {
          "name": "ESD CDM",
          "symbol": "V(ESD)",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -1000,
          "typ": null,
          "max": 1000,
          "conditions": "Charged-device model, JESD22-C101",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Junction-to-ambient thermal resistance",
          "symbol": "RθJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 92,
          "max": null,
          "conditions": "PW (TSSOP) 24 pins",
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          "source": "datasheet"
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        {
          "name": "Junction-to-case (top) thermal resistance",
          "symbol": "RθJC(top)",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 29.3,
          "max": null,
          "conditions": "PW (TSSOP) 24 pins",
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          "source": "datasheet"
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        {
          "name": "Junction-to-board thermal resistance",
          "symbol": "RθJB",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 46.7,
          "max": null,
          "conditions": "PW (TSSOP) 24 pins",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Junction-to-top characterization parameter",
          "symbol": "ψJT",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 1.5,
          "max": null,
          "conditions": "PW (TSSOP) 24 pins",
          "source_page": 5,
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        {
          "name": "Junction-to-board characterization parameter",
          "symbol": "ψJB",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 46.2,
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          "conditions": "PW (TSSOP) 24 pins",
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        {
          "name": "High-level output voltage",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": 0,
          "typ": null,
          "max": null,
          "conditions": "VI = VIH, IOH = –100µA, VCCA/VCCB 0.7V - 3.6V, min = VCCO – 0.1 (–40°C to 125°C)",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "High-level output voltage",
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          "unit": "V",
          "min": 2.3,
          "typ": null,
          "max": null,
          "conditions": "VI = VIH, IOH = -12mA, VCCA = VCCB = 3V, –40°C to 125°C",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Low-level output voltage",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.1,
          "conditions": "VI = VIL, IOL = 100µA, VCCA/VCCB 0.7V - 3.6V, –40°C to 125°C",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Low-level output voltage",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.7,
          "conditions": "VI = VIL, IOL = 12mA, VCCA = VCCB = 3V, –40°C to 125°C",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Input leakage current, control inputs",
          "symbol": "II",
          "kind": "electrical",
          "unit": "µA",
          "min": -1,
          "typ": null,
          "max": 1,
          "conditions": "VI = VCCA or GND, VCCA/VCCB 0.65V - 3.6V, –40°C to 125°C",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Partial power down current, A port",
          "symbol": "Ioff",
          "kind": "electrical",
          "unit": "µA",
          "min": -8,
          "typ": null,
          "max": 8,
          "conditions": "VI or VO = 0V - 3.6V, VCCA = 0V, VCCB = 0V - 3.6V, –40°C to 125°C",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Partial power down current, B port",
          "symbol": "Ioff",
          "kind": "electrical",
          "unit": "µA",
          "min": -8,
          "typ": null,
          "max": 8,
          "conditions": "VI or VO = 0V - 3.6V, VCCA = 0V - 3.6V, VCCB = 0V, –40°C to 125°C",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "High-impedance state output current, A port",
          "symbol": "IOZ",
          "kind": "electrical",
          "unit": "µA",
          "min": -8,
          "typ": null,
          "max": 8,
          "conditions": "VO = VCCO or GND, VI = VCCI or GND, OE = VIH, 3.6V, –40°C to 125°C",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "High-impedance state output current, B port",
          "symbol": "IOZ",
          "kind": "electrical",
          "unit": "µA",
          "min": -8,
          "typ": null,
          "max": 8,
          "conditions": "VO = VCCO or GND, VI = VCCI or GND, OE = VIH, 3.6V, –40°C to 125°C",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "VCCA supply current",
          "symbol": "ICCA",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": null,
          "max": 40,
          "conditions": "VI = VCCI or GND, IO = 0mA, VCCA/VCCB 0.65V - 3.6V, –40°C to 125°C",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "VCCB supply current",
          "symbol": "ICCB",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": null,
          "max": 38,
          "conditions": "VI = VCCI or GND, IO = 0mA, VCCA/VCCB 0.65V - 3.6V, –40°C to 125°C",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Combined supply current",
          "symbol": "ICCA + ICCB",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": null,
          "max": 55,
          "conditions": "VI = VCCI or GND, IO = 0mA, 0.65V - 3.6V, –40°C to 125°C",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Input capacitance, control inputs",
          "symbol": "Ci",
          "kind": "electrical",
          "unit": "pF",
          "min": null,
          "typ": 4.5,
          "max": null,
          "conditions": "VI = 3.3V or GND, VCCA = VCCB = 3.3V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Data I/O capacitance",
          "symbol": "Cio",
          "kind": "electrical",
          "unit": "pF",
          "min": null,
          "typ": 5.7,
          "max": null,
          "conditions": "OE = VCCA, VO = 1.65V DC + 1MHz -16dBm sine wave, 3.3V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Propagation delay A to B",
          "symbol": "tpd",
          "kind": "timing",
          "unit": "ns",
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