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Ray Set visibility: public 56e4fb4 7d ago
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{
  "schema_version": 1,
  "type": "component",
  "slug": "pca9538pw",
  "title": "PCA9538PW",
  "brief": "NXP Semicon I/O Expanders, TSSOP-16. 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",
    "interface ics",
    "pca9538pw",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "PCA9538PW",
    "manufacturer": "NXP Semicon",
    "package": "TSSOP-16",
    "pin_count": 16,
    "category": "Interface ICs",
    "subcategory": "I/O Expanders",
    "datasheet": "https://www.nxp.com/docs/en/data-sheet/PCA9538PW.pdf",
    "parts": {
      "symbol": "pca9538pw.kicad_sym",
      "footprint": "pca9538pw.kicad_mod",
      "model_3d": "pca9538pw-hero.glb",
      "model_3d_plain": "pca9538pw-etched.glb",
      "model_3d_step": "pca9538pw-etched.step",
      "model_3d_step_plain": "pca9538pw.step",
      "lbr": "pca9538pw.lbr"
    },
    "distributor_links": {
      "lcsc": "C2669741",
      "mouser": "771-PCA9538PW"
    },
    "distributor_check": {
      "checked_at": "2026-11-02T16:59:39Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": "771-PCA9538PW",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "A0",
        "type": "input",
        "description": "Address input 0 sets one of the fixed hardware-selectable bits of the I2C-bus target address (1 1 1 0 0 A1 A0)."
      },
      {
        "number": "2",
        "name": "A1",
        "type": "input",
        "description": "Address input 1 sets one of the fixed hardware-selectable bits of the I2C-bus target address (1 1 1 0 0 A1 A0)."
      },
      {
        "number": "3",
        "name": "RESET",
        "type": "input",
        "description": "Active LOW reset input that holds the registers and I2C-bus state machine in their default state while held LOW for at least tw(rst), and requires a pullup resistor to VDD if unused."
      },
      {
        "number": "4",
        "name": "IO0",
        "type": "bidirectional",
        "description": "Input/output 0 is a general-purpose I/O that defaults to an input at reset and can be raised above VDD up to a maximum of 5.5 V when configured as an input."
      },
      {
        "number": "5",
        "name": "IO1",
        "type": "bidirectional",
        "description": "Input/output 1 is a general-purpose I/O that defaults to an input at reset and can be raised above VDD up to a maximum of 5.5 V when configured as an input."
      },
      {
        "number": "6",
        "name": "IO2",
        "type": "bidirectional",
        "description": "Input/output 2 is a general-purpose I/O that defaults to an input at reset and can be raised above VDD up to a maximum of 5.5 V when configured as an input."
      },
      {
        "number": "7",
        "name": "IO3",
        "type": "bidirectional",
        "description": "Input/output 3 is a general-purpose I/O that defaults to an input at reset and can be raised above VDD up to a maximum of 5.5 V when configured as an input."
      },
      {
        "number": "8",
        "name": "VSS",
        "type": "power_in",
        "description": "Supply ground; it must be connected to the supply ground for proper device operation."
      },
      {
        "number": "9",
        "name": "IO4",
        "type": "bidirectional",
        "description": "Input/output 4 is a general-purpose I/O that defaults to an input at reset and can be raised above VDD up to a maximum of 5.5 V when configured as an input."
      },
      {
        "number": "10",
        "name": "IO5",
        "type": "bidirectional",
        "description": "Input/output 5 is a general-purpose I/O that defaults to an input at reset and can be raised above VDD up to a maximum of 5.5 V when configured as an input."
      },
      {
        "number": "11",
        "name": "IO6",
        "type": "bidirectional",
        "description": "Input/output 6 is a general-purpose I/O that defaults to an input at reset and can be raised above VDD up to a maximum of 5.5 V when configured as an input."
      },
      {
        "number": "12",
        "name": "IO7",
        "type": "bidirectional",
        "description": "Input/output 7 is a general-purpose I/O that defaults to an input at reset and can be raised above VDD up to a maximum of 5.5 V when configured as an input."
      },
      {
        "number": "13",
        "name": "INT",
        "type": "output",
        "description": "Open-drain active LOW interrupt output that is activated when any input state differs from its Input Port register state."
      },
      {
        "number": "14",
        "name": "SCL",
        "type": "input",
        "description": "Serial clock line for the I2C-bus/SMBus interface, supporting 0 Hz to 400 kHz clock frequency with a noise filter on its input."
      },
      {
        "number": "15",
        "name": "SDA",
        "type": "bidirectional",
        "description": "Serial data line for the I2C-bus/SMBus interface, with a noise filter on its input."
      },
      {
        "number": "16",
        "name": "VDD",
        "type": "power_in",
        "description": "Supply voltage with an operating range of 2.3 V to 5.5 V (3.0 V to 5.5 V for PCA9538PW/Q900)."
      }
    ],
    "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": [],
        "pages_sent": 14,
        "cost_usd": 0.0178,
        "at": "2026-11-02T16:59:25"
      },
      "datasheet": {
        "url": "https://www.nxp.com/docs/en/data-sheet/PCA9538PW.pdf",
        "pages": 37,
        "sha256": "fcc5a3c0acdca85d",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 16,
        "described": 16,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "pca9538pw.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.4,
          5,
          1.1
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "6ad5e98224d02a427d9a6b929a28dbc158b9925fba5adec12db05079f1016948",
        "checked": "2026-11-02",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "pca9538pw-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.4,
          5,
          1.1
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "4f37dd7fd1af6fe29c5dc0134a1a633888d044eab80b8fa958819f479cb57d5a",
        "checked": "2026-11-02",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "NXP Semicon",
      "Package": "TSSOP-16",
      "Category": "Interface ICs",
      "Pins": "16"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "fcc5a3c0acdca85d4e542553b50fe0bca17075c27721edd6e22a894252a9a0e5",
      "rows": [
        {
          "name": "Supply voltage",
          "symbol": "VDD",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.5,
          "typ": null,
          "max": 6,
          "conditions": "",
          "source_page": 14,
          "source": "datasheet"
        },
        {
          "name": "Input current",
          "symbol": "II",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": -20,
          "typ": null,
          "max": 20,
          "conditions": "",
          "source_page": 14,
          "source": "datasheet"
        },
        {
          "name": "Voltage on an input/output pin",
          "symbol": "VI/O",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 5.5,
          "conditions": "min printed as VSS - 0.5",
          "source_page": 14,
          "source": "datasheet"
        },
        {
          "name": "Output current on pin IOn",
          "symbol": "IO(IOn)",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": -50,
          "typ": null,
          "max": 50,
          "conditions": "",
          "source_page": 14,
          "source": "datasheet"
        },
        {
          "name": "Supply current",
          "symbol": "IDD",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 85,
          "conditions": "",
          "source_page": 14,
          "source": "datasheet"
        },
        {
          "name": "Ground supply current",
          "symbol": "ISS",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 100,
          "conditions": "",
          "source_page": 14,
          "source": "datasheet"
        },
        {
          "name": "Total power dissipation",
          "symbol": "Ptot",
          "kind": "absolute_maximum",
          "unit": "mW",
          "min": null,
          "typ": null,
          "max": 200,
          "conditions": "",
          "source_page": 14,
          "source": "datasheet"
        },
        {
          "name": "Storage temperature",
          "symbol": "Tstg",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 14,
          "source": "datasheet"
        },
        {
          "name": "Ambient temperature, operating",
          "symbol": "Tamb",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "All devices except PCA9538PW/Q900",
          "source_page": 14,
          "source": "datasheet"
        },
        {
          "name": "Maximum junction temperature",
          "symbol": "Tj(max)",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 14,
          "source": "datasheet"
        },
        {
          "name": "Supply voltage",
          "symbol": "VDD",
          "kind": "electrical",
          "unit": "V",
          "min": 2.3,
          "typ": null,
          "max": 5.5,
          "conditions": "",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "Supply current",
          "symbol": "IDD",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 104,
          "max": 175,
          "conditions": "Operating mode; VDD = 5.5 V; no load; fSCL = 100 kHz",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "LOW-level standby current",
          "symbol": "IstbL",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 0.25,
          "max": 1,
          "conditions": "Standby mode; VDD = 5.5 V; no load; VI = VSS; fSCL = 0 kHz; I/O = inputs",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "HIGH-level standby current",
          "symbol": "IstbH",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 0.25,
          "max": 1,
          "conditions": "Standby mode; VDD = 5.5 V; no load; VI = VDD; fSCL = 0 kHz; I/O = inputs",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "Power-on reset voltage",
          "symbol": "VPOR",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 1.7,
          "max": 2.2,
          "conditions": "No load; VI = VDD or VSS",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "LOW-level input voltage, SCL and SDA",
          "symbol": "VIL",
          "kind": "electrical",
          "unit": "V",
          "min": -0.5,
          "typ": null,
          "max": null,
          "conditions": "Input SCL; input/output SDA; upper limit +0.3VDD",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "HIGH-level input voltage, SCL and SDA",
          "symbol": "VIH",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 5.5,
          "conditions": "Input SCL; input/output SDA; lower limit 0.7VDD",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "LOW-level output current, SDA",
          "symbol": "IOL",
          "kind": "electrical",
          "unit": "mA",
          "min": 3,
          "typ": 7,
          "max": null,
          "conditions": "VOL = 0.4 V",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "Leakage current, SCL",
          "symbol": "IL",
          "kind": "electrical",
          "unit": "μA",
          "min": -1,
          "typ": null,
          "max": 1,
          "conditions": "VI = VDD = VSS",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "Input capacitance, SCL",
          "symbol": "Ci",
          "kind": "electrical",
          "unit": "pF",
          "min": null,
          "typ": 5,
          "max": 10,
          "conditions": "VI = VSS",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "LOW-level input voltage, I/Os",
          "symbol": "VIL",
          "kind": "electrical",
          "unit": "V",
          "min": -0.5,
          "typ": null,
          "max": null,
          "conditions": "I/Os; upper limit +0.3VDD",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "HIGH-level input voltage, I/Os",
          "symbol": "VIH",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 5.5,
          "conditions": "I/Os; lower limit 0.7VDD",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "LOW-level output current, I/Os",
          "symbol": "IOL",
          "kind": "electrical",
          "unit": "mA",
          "min": 8,
          "typ": 10,
          "max": null,
          "conditions": "VOL = 0.5 V; VDD = 2.3 V",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "LOW-level output current, I/Os",
          "symbol": "IOL",
          "kind": "electrical",
          "unit": "mA",
          "min": 8,
          "typ": 14,
          "max": null,
          "conditions": "VOL = 0.5 V; VDD = 3.0 V",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "LOW-level output current, I/Os",
          "symbol": "IOL",
          "kind": "electrical",
          "unit": "mA",
          "min": 8,
          "typ": 17,
          "max": null,
          "conditions": "VOL = 0.5 V; VDD = 4.5 V",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "LOW-level output current, I/Os",
          "symbol": "IOL",
          "kind": "electrical",
          "unit": "mA",
          "min": 10,
          "typ": 13,
          "max": null,
          "conditions": "VOL = 0.7 V; VDD = 2.3 V",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "LOW-level output current, I/Os",
          "symbol": "IOL",
          "kind": "electrical",
          "unit": "mA",
          "min": 10,
          "typ": 19,
          "max": null,
          "conditions": "VOL = 0.7 V; VDD = 3.0 V",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "LOW-level output current, I/Os",
          "symbol": "IOL",
          "kind": "electrical",
          "unit": "mA",
          "min": 10,
          "typ": 24,
          "max": null,
          "conditions": "VOL = 0.7 V; VDD = 4.5 V",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "HIGH-level output voltage, I/Os",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": 1.8,
          "typ": null,
          "max": null,
          "conditions": "IOH = -8 mA; VDD = 2.3 V",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "HIGH-level output voltage, I/Os",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": 2.6,
          "typ": null,
          "max": null,
          "conditions": "IOH = -8 mA; VDD = 3.0 V",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "HIGH-level output voltage, I/Os",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": 4.1,
          "typ": null,
          "max": null,
          "conditions": "IOH = -8 mA; VDD = 4.5 V",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "HIGH-level output voltage, I/Os",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": 1.7,
          "typ": null,
          "max": null,
          "conditions": "IOH = -10 mA; VDD = 2.3 V",
          "source_page": 15,
          "source": "datasheet"
        },
        {
          "name": "HIGH-level output voltage, I/Os",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": 2.5,
          "typ": null,
          "max": null,
          "conditions": "IOH = -10 mA; VDD = 3.0 V",
          "source_page": 16,
          "source": "datasheet"
        },
        {
          "name": "HIGH-level output voltage, I/Os",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": 4,
          "typ": null,
          "max": null,
          "conditions": "IOH = -10 mA; VDD = 4.5 V",
          "source_page": 16,
          "source": "datasheet"
        },
        {
          "name": "Input leakage current, I/Os",
          "symbol": "ILI",
          "kind": "electrical",
          "unit": "μA",
          "min": -1,
          "typ": null,
          "max": 1,
          "conditions": "VI = VDD = VSS",
          "source_page": 16,
          "source": "datasheet"
        },
        {
          "name": "Input capacitance, I/Os",
          "symbol": "Ci",
          "kind": "electrical",
          "unit": "pF",
          "min": null,
          "typ": 5,
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