SN74HCT244QPWRQ1

{
  "slug": "sn74hct244qpwrq1",
  "version": "0.1.0",
  "type": "component",
  "description": "Texas Instruments Buffers, Drivers, Receivers, Transceivers, TSSOP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
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    "logic",
    "sn74hct244qpwrq1",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
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  "component": {
    "mpn": "SN74HCT244QPWRQ1",
    "manufacturer": "Texas Instruments",
    "package": "TSSOP-20",
    "pin_count": 20,
    "category": "Logic",
    "subcategory": "Buffers, Drivers, Receivers, Transceivers",
    "datasheet": "https://www.ti.com/cn/lit/gpn/sn74hct244-q1",
    "parts": {
      "symbol": "sn74hct244qpwrq1.kicad_sym",
      "footprint": "sn74hct244qpwrq1.kicad_mod",
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      "lbr": "sn74hct244qpwrq1.lbr"
    },
    "distributor_links": {
      "lcsc": "C544591",
      "digikey": "296-44962-2-ND",
      "mouser": "595-SN74HCT244QPWRQ1"
    },
    "distributor_check": {
      "checked_at": "2026-10-02T00:51:51Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-44962-2-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "595-SN74HCT244QPWRQ1",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "1OE",
        "type": "input",
        "description": "Output Enable 1 input (active low), enables Y1-Y4 outputs when low and places them in high-impedance when high, TTL input compatible with VIH ≥ 2V and VIL ≤ 0.8V."
      },
      {
        "number": "2",
        "name": "1A1",
        "type": "input",
        "description": "Data input A1 for buffer 1, non-inverted data passes to Y1 when 1OE is low, TTL input compatible with maximum input current II ≤ ±100nA."
      },
      {
        "number": "3",
        "name": "2Y4",
        "type": "tri_state",
        "description": "Output Y4 for buffer 2, tri-state driver with ±6mA capability at 5V, output leakage current ≤ ±10µA when 2OE is high."
      },
      {
        "number": "4",
        "name": "1A2",
        "type": "input",
        "description": "Data input A2 for buffer 1, non-inverted data passes to Y2 when 1OE is low, TTL input compatible with maximum input current II ≤ ±100nA."
      },
      {
        "number": "5",
        "name": "2Y3",
        "type": "tri_state",
        "description": "Output Y3 for buffer 2, tri-state driver with ±6mA capability at 5V, output leakage current ≤ ±10µA when 2OE is high."
      },
      {
        "number": "6",
        "name": "1A3",
        "type": "input",
        "description": "Data input A3 for buffer 1, non-inverted data passes to Y3 when 1OE is low, TTL input compatible with maximum input current II ≤ ±100nA."
      },
      {
        "number": "7",
        "name": "2Y2",
        "type": "tri_state",
        "description": "Output Y2 for buffer 2, tri-state driver with ±6mA capability at 5V, output leakage current ≤ ±10µA when 2OE is high."
      },
      {
        "number": "8",
        "name": "1A4",
        "type": "input",
        "description": "Data input A4 for buffer 1, non-inverted data passes to Y4 when 1OE is low, TTL input compatible with maximum input current II ≤ ±100nA."
      },
      {
        "number": "9",
        "name": "2Y1",
        "type": "tri_state",
        "description": "Output Y1 for buffer 2, tri-state driver with ±6mA capability at 5V, output leakage current ≤ ±10µA when 2OE is high."
      },
      {
        "number": "10",
        "name": "GND",
        "type": "power_in",
        "description": "Ground (0V reference), negative supply return for device operation."
      },
      {
        "number": "11",
        "name": "2A1",
        "type": "input",
        "description": "Data input A1 for buffer 2, non-inverted data passes to Y1 when 2OE is low, TTL input compatible with maximum input current II ≤ ±100nA."
      },
      {
        "number": "12",
        "name": "1Y4",
        "type": "tri_state",
        "description": "Output Y4 for buffer 1, tri-state driver with ±6mA capability at 5V, output leakage current ≤ ±10µA when 1OE is high."
      },
      {
        "number": "13",
        "name": "2A2",
        "type": "input",
        "description": "Data input A2 for buffer 2, non-inverted data passes to Y2 when 2OE is low, TTL input compatible with maximum input current II ≤ ±100nA."
      },
      {
        "number": "14",
        "name": "1Y3",
        "type": "tri_state",
        "description": "Output Y3 for buffer 1, tri-state driver with ±6mA capability at 5V, output leakage current ≤ ±10µA when 1OE is high."
      },
      {
        "number": "15",
        "name": "2A3",
        "type": "input",
        "description": "Data input A3 for buffer 2, non-inverted data passes to Y3 when 2OE is low, TTL input compatible with maximum input current II ≤ ±100nA."
      },
      {
        "number": "16",
        "name": "1Y2",
        "type": "tri_state",
        "description": "Output Y2 for buffer 1, tri-state driver with ±6mA capability at 5V, output leakage current ≤ ±10µA when 1OE is high."
      },
      {
        "number": "17",
        "name": "2A4",
        "type": "input",
        "description": "Data input A4 for buffer 2, non-inverted data passes to Y4 when 2OE is low, TTL input compatible with maximum input current II ≤ ±100nA."
      },
      {
        "number": "18",
        "name": "1Y1",
        "type": "tri_state",
        "description": "Output Y1 for buffer 1, tri-state driver with ±6mA capability at 5V, output leakage current ≤ ±10µA when 1OE is high."
      },
      {
        "number": "19",
        "name": "2OE",
        "type": "input",
        "description": "Output Enable 2 input (active low), enables Y1-Y4 outputs when low and places them in high-impedance when high, TTL input compatible with VIH ≥ 2V and VIL ≤ 0.8V."
      },
      {
        "number": "20",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply voltage for device operation, recommended operating range 4.5-5.5V, requires 0.1µF bypass capacitor."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-4-5-20251001",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [],
        "pages_sent": 17,
        "cost_usd": 0.1668,
        "at": "2026-10-02T00:51:33"
      },
      "datasheet": {
        "url": "https://www.ti.com/cn/lit/gpn/sn74hct244-q1",
        "pages": 17,
        "sha256": "3bffd969574117bd",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 20,
        "described": 20,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
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}