SN74ABT821ADWR

{
  "schema_version": 1,
  "type": "component",
  "slug": "sn74abt821adwr",
  "title": "SN74ABT821ADWR",
  "brief": "Texas Instruments Flip Flops, SOIC-24-300mil. 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",
    "sn74abt821adwr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "SN74ABT821ADWR",
    "manufacturer": "Texas Instruments",
    "package": "SOIC-24-300mil",
    "pin_count": 24,
    "category": "Logic",
    "subcategory": "Flip Flops",
    "datasheet": "https://www.ti.com/lit/ds/symlink/sn74abt821a.pdf",
    "parts": {
      "symbol": "sn74abt821adwr.kicad_sym",
      "footprint": "sn74abt821adwr.kicad_mod",
      "model_3d": "sn74abt821adwr-hero.glb",
      "model_3d_plain": "sn74abt821adwr-etched.glb",
      "model_3d_step": "sn74abt821adwr-etched.step",
      "model_3d_step_plain": "sn74abt821adwr.step",
      "lbr": "sn74abt821adwr.lbr"
    },
    "distributor_links": {
      "lcsc": "C2871100",
      "digikey": "296-14677-2-ND",
      "mouser": "595-SN74ABT821ADWR"
    },
    "distributor_check": {
      "checked_at": "2026-11-05T22:56:54Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "296-14677-2-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "595-SN74ABT821ADWR",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "OE",
        "type": "input",
        "description": "Buffered output-enable input places the ten Q outputs in the high-impedance state when high and does not affect the latched data; the outputs are in the high-impedance state during power up or power down when VCC is below 2.1 V."
      },
      {
        "number": "2",
        "name": "1D",
        "type": "input",
        "description": "Data input to flip-flop 1 that is captured on the positive transition of CLK; the recommended setup time is 2.1 ns and hold time is 1.3 ns."
      },
      {
        "number": "3",
        "name": "2D",
        "type": "input",
        "description": "Data input to flip-flop 2 that is captured on the positive transition of CLK; the recommended setup time is 2.1 ns and hold time is 1.3 ns."
      },
      {
        "number": "4",
        "name": "3D",
        "type": "input",
        "description": "Data input to flip-flop 3 that is captured on the positive transition of CLK; the recommended setup time is 2.1 ns and hold time is 1.3 ns."
      },
      {
        "number": "5",
        "name": "4D",
        "type": "input",
        "description": "Data input to flip-flop 4 that is captured on the positive transition of CLK; the recommended setup time is 2.1 ns and hold time is 1.3 ns."
      },
      {
        "number": "6",
        "name": "5D",
        "type": "input",
        "description": "Data input to flip-flop 5 that is captured on the positive transition of CLK; the recommended setup time is 2.1 ns and hold time is 1.3 ns."
      },
      {
        "number": "7",
        "name": "6D",
        "type": "input",
        "description": "Data input to flip-flop 6 that is captured on the positive transition of CLK; the recommended setup time is 2.1 ns and hold time is 1.3 ns."
      },
      {
        "number": "8",
        "name": "7D",
        "type": "input",
        "description": "Data input to flip-flop 7 that is captured on the positive transition of CLK; the recommended setup time is 2.1 ns and hold time is 1.3 ns."
      },
      {
        "number": "9",
        "name": "8D",
        "type": "input",
        "description": "Data input to flip-flop 8 that is captured on the positive transition of CLK; the recommended setup time is 2.1 ns and hold time is 1.3 ns."
      },
      {
        "number": "10",
        "name": "9D",
        "type": "input",
        "description": "Data input to flip-flop 9 that is captured on the positive transition of CLK; the recommended setup time is 2.1 ns and hold time is 1.3 ns."
      },
      {
        "number": "11",
        "name": "10D",
        "type": "input",
        "description": "Data input to flip-flop 10 that is captured on the positive transition of CLK; the recommended setup time is 2.1 ns and hold time is 1.3 ns."
      },
      {
        "number": "12",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference pin for the device; the recommended supply range is 4.5 V to 5.5 V on VCC relative to this pin."
      },
      {
        "number": "13",
        "name": "CLK",
        "type": "input",
        "description": "Clock input on whose positive transition the ten D inputs are latched and transferred to the Q outputs; maximum clock frequency is 125 MHz with pulse widths of at least 2.9 ns high and 3.8 ns low."
      },
      {
        "number": "14",
        "name": "10Q",
        "type": "tri_state",
        "description": "Three-state buffered output of flip-flop 10 that drives high-capacitance or low-impedance bus loads with up to 32 mA IOH and 64 mA IOL."
      },
      {
        "number": "15",
        "name": "9Q",
        "type": "tri_state",
        "description": "Three-state buffered output of flip-flop 9 that drives high-capacitance or low-impedance bus loads with up to 32 mA IOH and 64 mA IOL."
      },
      {
        "number": "16",
        "name": "8Q",
        "type": "tri_state",
        "description": "Three-state buffered output of flip-flop 8 that drives high-capacitance or low-impedance bus loads with up to 32 mA IOH and 64 mA IOL."
      },
      {
        "number": "17",
        "name": "7Q",
        "type": "tri_state",
        "description": "Three-state buffered output of flip-flop 7 that drives high-capacitance or low-impedance bus loads with up to 32 mA IOH and 64 mA IOL."
      },
      {
        "number": "18",
        "name": "6Q",
        "type": "tri_state",
        "description": "Three-state buffered output of flip-flop 6 that drives high-capacitance or low-impedance bus loads with up to 32 mA IOH and 64 mA IOL."
      },
      {
        "number": "19",
        "name": "5Q",
        "type": "tri_state",
        "description": "Three-state buffered output of flip-flop 5 that drives high-capacitance or low-impedance bus loads with up to 32 mA IOH and 64 mA IOL."
      },
      {
        "number": "20",
        "name": "4Q",
        "type": "tri_state",
        "description": "Three-state buffered output of flip-flop 4 that drives high-capacitance or low-impedance bus loads with up to 32 mA IOH and 64 mA IOL."
      },
      {
        "number": "21",
        "name": "3Q",
        "type": "tri_state",
        "description": "Three-state buffered output of flip-flop 3 that drives high-capacitance or low-impedance bus loads with up to 32 mA IOH and 64 mA IOL."
      },
      {
        "number": "22",
        "name": "2Q",
        "type": "tri_state",
        "description": "Three-state buffered output of flip-flop 2 that drives high-capacitance or low-impedance bus loads with up to 32 mA IOH and 64 mA IOL."
      },
      {
        "number": "23",
        "name": "1Q",
        "type": "tri_state",
        "description": "Three-state buffered output of flip-flop 1 that drives high-capacitance or low-impedance bus loads with up to 32 mA IOH and 64 mA IOL."
      },
      {
        "number": "24",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply voltage input with a recommended range of 4.5 V to 5.5 V and an absolute maximum of 7 V."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
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        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Pin numbers were taken from the DB/DW top-view figure and cross-checked against the logic symbol and"
        ],
        "pages_sent": 15,
        "cost_usd": 0.0241,
        "at": "2026-11-05T22:56:47"
      },
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/sn74abt821a.pdf",
        "pages": 15,
        "sha256": "16843c4ca7b2e96b",
        "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": {
      "symbol": "viewers/symbol.html",
      "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,
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        "sha256": "4b0d20f82f5b0124fecfe11c941274a3c865a30f7baee8b8fadd7df55972d4cd",
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "SOIC-24-300mil",
      "Category": "Logic",
      "Pins": "24"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "16843c4ca7b2e96b7519c4baabda44fc85bf622e08663dfe7e8d29e9abd37e05",
      "rows": [
        {
          "name": "Supply voltage",
          "symbol": "VCC",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 4.5,
          "typ": null,
          "max": 5.5,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "High-level input voltage",
          "symbol": "VIH",
          "kind": "recommended_operating",
          "unit": "V",
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          "typ": null,
          "max": null,
          "conditions": "",
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        {
          "name": "Low-level input voltage",
          "symbol": "VIL",
          "kind": "recommended_operating",
          "unit": "V",
          "min": null,
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          "max": 0.8,
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          "symbol": "VI",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 0,
          "typ": null,
          "max": null,
          "conditions": "max printed as VCC",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "High-level output current",
          "symbol": "IOH",
          "kind": "recommended_operating",
          "unit": "mA",
          "min": -32,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 3,
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        },
        {
          "name": "Low-level output current",
          "symbol": "IOL",
          "kind": "recommended_operating",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 64,
          "conditions": "",
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        },
        {
          "name": "Input transition rise or fall rate",
          "symbol": "∆t/∆v",
          "kind": "recommended_operating",
          "unit": "ns/V",
          "min": null,
          "typ": null,
          "max": 10,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Power-up ramp rate",
          "symbol": "∆t/∆VCC",
          "kind": "recommended_operating",
          "unit": "µs/V",
          "min": null,
          "typ": null,
          "max": 200,
          "conditions": "",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Operating free-air temperature",
          "symbol": "TA",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "",
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          "source": "datasheet"
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        {
          "name": "Supply voltage range",
          "symbol": "VCC",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.5,
          "typ": null,
          "max": 7,
          "conditions": "",
          "source_page": 3,
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        },
        {
          "name": "Input voltage range",
          "symbol": "VI",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.5,
          "typ": null,
          "max": 7,
          "conditions": "see Note 1",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Voltage applied to any output in high or power-off state",
          "symbol": "VO",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.5,
          "typ": null,
          "max": 5.5,
          "conditions": "",
          "source_page": 3,
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        },
        {
          "name": "Current into any output in low state",
          "symbol": "IO",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 128,
          "conditions": "SN74ABT821A",
          "source_page": 3,
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        },
        {
          "name": "Input clamp current",
          "symbol": "IIK",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": -18,
          "conditions": "VI < 0",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Output clamp current",
          "symbol": "IOK",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": -50,
          "conditions": "VO < 0",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature range",
          "symbol": "Tstg",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 3,
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        },
        {
          "name": "Package thermal impedance",
          "symbol": "θJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 81,
          "max": null,
          "conditions": "DW package",
          "source_page": 3,
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        },
        {
          "name": "Input clamp voltage",
          "symbol": "VIK",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": -1.2,
          "conditions": "VCC = 4.5 V, II = –18 mA",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "High-level output voltage",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": 2.5,
          "typ": null,
          "max": null,
          "conditions": "VCC = 4.5 V, IOH = –3 mA",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "High-level output voltage",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": 3,
          "typ": null,
          "max": null,
          "conditions": "VCC = 5 V, IOH = –3 mA",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "High-level output voltage",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": 2,
          "typ": null,
          "max": null,
          "conditions": "VCC = 4.5 V, IOH = –32 mA",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Low-level output voltage",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.55,
          "conditions": "VCC = 4.5 V, IOL = 64 mA",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Input current",
          "symbol": "II",
          "kind": "electrical",
          "unit": "µA",
          "min": -1,
          "typ": null,
          "max": 1,
          "conditions": "VCC = 0 to 5.5 V, VI = VCC or GND",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Power-up output high-impedance current",
          "symbol": "IOZPU",
          "kind": "electrical",
          "unit": "µA",
          "min": -50,
          "typ": null,
          "max": 50,
          "conditions": "VCC = 0 to 2.1 V, VO = 0.5 to 2.7 V, OE = X",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Power-down output high-impedance current",
          "symbol": "IOZPD",
          "kind": "electrical",
          "unit": "µA",
          "min": -50,
          "typ": null,
          "max": 50,
          "conditions": "VCC = 2.1 V to 0, VO = 0.5 to 2.7 V, OE = X",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "High-impedance output current high",
          "symbol": "IOZH",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": null,
          "max": 10,
          "conditions": "VCC = 2.1 V to 5.5 V, VO = 2.7 V, OE ≥ 2 V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "High-impedance output current low",
          "symbol": "IOZL",
          "kind": "electrical",
          "unit": "µA",
          "min": -10,
          "typ": null,
          "max": null,
          "conditions": "VCC = 2.1 V to 5.5 V, VO = 0.5 V, OE ≥ 2 V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Power-off input/output current",
          "symbol": "Ioff",
          "kind": "electrical",
          "unit": "µA",
          "min": -100,
          "typ": null,
          "max": 100,
          "conditions": "VCC = 0, VI or VO ≤ 4.5 V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Output high leakage current",
          "symbol": "ICEX",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": null,
          "max": 50,
          "conditions": "VCC = 5.5 V, VO = 5.5 V, outputs high",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Short-circuit output current",
          "symbol": "IO",
          "kind": "electrical",
          "unit": "mA",
          "min": -180,
          "typ": -100,
          "max": -50,
          "conditions": "VCC = 5.5 V, VO = 2.5 V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Quiescent supply current, outputs high",
          "symbol": "ICC",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 1,
          "max": 250,
          "conditions": "VCC = 5.5 V, IO = 0, VI = VCC or GND, outputs high",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Quiescent supply current, outputs low",
          "symbol": "ICC",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 24,
          "max": 38,
          "conditions": "VCC = 5.5 V, IO = 0, VI = VCC or GND, outputs low",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Quiescent supply current, outputs disabled",
          "symbol": "ICC",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 0.5,
          "max": 250,
          "conditions": "VCC = 5.5 V, IO = 0, VI = VCC or GND, outputs disabled",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Supply current increase per input at TTL level",
          "symbol": "∆ICC",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 1.5,
          "conditions": "VCC = 5.5 V, one input at 3.4 V, other inputs at VCC or GND",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Input capacitance",
          "symbol": "Ci",
          "kind": "electrical",
          "unit": "pF",
          "min": null,
          "typ": 3.5,
          "max": null,
          "conditions": "VI = 2.5 V or 0.5 V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Output capacitance",
          "symbol": "Co",
          "kind": "electrical",
          "unit": "pF",
          "min": null,
          "typ": 7.5,
          "max": null,
          "conditions": "VO = 2.5 V or 0.5 V",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Input hysteresis",
          "symbol": "Vhys",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": 100,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Clock frequency",
          "symbol": "fclock",
          "kind": "timing",
          "unit": "MHz",
          "min": 0,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Pulse duration CLK high",
          "symbol": "tw",
          "kind": "timing",
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