main
Ray Set visibility: public 5d87066 7d ago
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{
  "schema_version": 1,
  "type": "component",
  "slug": "xd74ls194",
  "title": "XD74LS194",
  "brief": "XINLUDA Shift Registers, DIP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
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    "logic",
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    "extractor-text"
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  "component": {
    "mpn": "XD74LS194",
    "manufacturer": "XINLUDA",
    "package": "DIP-16",
    "pin_count": 16,
    "category": "Logic",
    "subcategory": "Shift Registers",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588916401654403072",
    "parts": {
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      "footprint": "xd74ls194.kicad_mod",
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      "model_3d_plain": "xd74ls194-etched.glb",
      "model_3d_step": "xd74ls194-etched.step",
      "model_3d_step_plain": "xd74ls194.step",
      "lbr": "xd74ls194.lbr"
    },
    "distributor_links": {
      "lcsc": "C609770"
    },
    "distributor_check": {
      "checked_at": "2026-10-16T11:22:44Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "CLR",
        "type": "input",
        "description": "Active-low direct overriding clear input that sets all outputs QA-QD low regardless of clock."
      },
      {
        "number": "2",
        "name": "SR SER",
        "type": "input",
        "description": "Shift-right serial data input, entered on the rising clock edge when S0 is high and S1 is low."
      },
      {
        "number": "3",
        "name": "A",
        "type": "input",
        "description": "Parallel data input A, loaded into QA on the rising clock edge when S0 and S1 are both high."
      },
      {
        "number": "4",
        "name": "B",
        "type": "input",
        "description": "Parallel data input B, loaded into QB on the rising clock edge when S0 and S1 are both high."
      },
      {
        "number": "5",
        "name": "C",
        "type": "input",
        "description": "Parallel data input C, loaded into QC on the rising clock edge when S0 and S1 are both high."
      },
      {
        "number": "6",
        "name": "D",
        "type": "input",
        "description": "Parallel data input D, loaded into QD on the rising clock edge when S0 and S1 are both high."
      },
      {
        "number": "7",
        "name": "SL SER",
        "type": "input",
        "description": "Shift-left serial data input, entered on the rising clock edge when S0 is low and S1 is high."
      },
      {
        "number": "8",
        "name": "GND",
        "type": "power_in",
        "description": "Ground supply pin."
      },
      {
        "number": "9",
        "name": "S0",
        "type": "input",
        "description": "Mode control input S0, which together with S1 selects hold, shift right, shift left or parallel load."
      },
      {
        "number": "10",
        "name": "S1",
        "type": "input",
        "description": "Mode control input S1, which together with S0 selects hold, shift right, shift left or parallel load."
      },
      {
        "number": "11",
        "name": "CLK",
        "type": "input",
        "description": "Clock input, positive-edge triggered."
      },
      {
        "number": "12",
        "name": "QD",
        "type": "output",
        "description": "Register output D, the last stage in the shift-right direction, with IOL up to 8 mA."
      },
      {
        "number": "13",
        "name": "QC",
        "type": "output",
        "description": "Register output C, with IOL up to 8 mA."
      },
      {
        "number": "14",
        "name": "QB",
        "type": "output",
        "description": "Register output B, with IOL up to 8 mA."
      },
      {
        "number": "15",
        "name": "QA",
        "type": "output",
        "description": "Register output A, the first stage in the shift-right direction, with IOL up to 8 mA."
      },
      {
        "number": "16",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply voltage, recommended 4.75 V to 5.25 V, absolute maximum 7 V."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
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        "primary_model": "claude-sonnet-5-5",
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        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
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        "at": "2026-10-16T11:22:26"
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        "sha256": "17a30b1f0ab3fd5384a1231e3c63c394888d5b952c542a8c189e023ed3467464",
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  "metadata": {
    "specs": {
      "Manufacturer": "XINLUDA",
      "Package": "DIP-16",
      "Category": "Logic",
      "Pins": "16"
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          "min": 4.75,
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          "max": 5.25,
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          "max": -400,
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          "name": "Width of any input pulse",
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          "name": "Clear inactive-state setup time",
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          "min": 0,
          "typ": null,
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        {
          "name": "Operating free-air temperature range",
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          "kind": "recommended_operating",
          "unit": "C",
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          "typ": null,
          "max": 70,
          "conditions": "",
          "source_page": 6,
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          "name": "Supply voltage",
          "symbol": "VCC",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 7,
          "conditions": "",
          "source_page": 5,
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        {
          "name": "Input voltage",
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          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 7,
          "conditions": "74LS194",
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          "source": "datasheet"
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        {
          "name": "Operating free-air temperature range",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "C",
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          "max": 70,
          "conditions": "DIP package",
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        {
          "name": "Storage temperature range",
          "symbol": "Tstg",
          "kind": "absolute_maximum",
          "unit": "C",
          "min": -65,
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          "min": 2,
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          "min": null,
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          "max": 0.8,
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          "name": "Input clamp voltage",
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          "max": -1.5,
          "conditions": "VCC = MIN, II = −18 mA",
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          "kind": "electrical",
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          "min": 2.7,
          "typ": 3.5,
          "max": null,
          "conditions": "VCC = MIN, VIL = VIL MAX, VIH = 2 V, IOH = −400 μA",
          "source_page": 6,
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          "name": "Low-level output voltage",
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          "typ": 0.25,
          "max": 0.4,
          "conditions": "VCC = MIN, VIH = 2 V, VIL = VIL MAX, IOL = 4 mA",
          "source_page": 6,
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          "name": "Low-level output voltage",
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          "conditions": "VCC = MIN, VIH = 2 V, VIL = VIL MAX, IOL = 8 mA",
          "source_page": 6,
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          "min": null,
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          "conditions": "VCC = MAX, VI = 2.7 V",
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          "kind": "electrical",
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          "name": "Short-circuit output current",
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          "kind": "electrical",
          "unit": "mA",
          "min": -20,
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          "conditions": "VCC = MAX",
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          "min": null,
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          "conditions": "VCC = MAX",
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          "name": "Maximum clock frequency",
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          "min": 25,
          "typ": 36,
          "max": null,
          "conditions": "",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Propagation delay time, high-to-low-level output from clear",
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          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 19,
          "max": 30,
          "conditions": "CL = 15 pF, RL = 2 k",
          "source_page": 7,
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        {
          "name": "Propagation delay time, low-to-high-level output from clear",
          "symbol": "tPLH",
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          "min": null,
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          "max": 22,
          "conditions": "CL = 15 pF, RL = 2 k",
          "source_page": 7,
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        {
          "name": "Propagation delay time, high-to-low-level output (third row)",
          "symbol": "tPHL",
          "kind": "timing",
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          "min": null,
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          "conditions": "CL = 15 pF, RL = 2 k",
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  "sections": [
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  "discovery_triggers": [
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  ],
  "discovery_pitch": "XD74LS194 (XINLUDA) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
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}