PCF8574P

{
  "schema_version": 1,
  "type": "component",
  "slug": "pcf8574p",
  "title": "PCF8574P",
  "brief": "HGSEMI I/O Expanders, 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",
  "tags": [
    "component",
    "interface",
    "pcf8574p",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "PCF8574P",
    "manufacturer": "HGSEMI",
    "package": "DIP-16",
    "pin_count": 16,
    "category": "Interface",
    "subcategory": "I/O Expanders",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8758163432698982400",
    "parts": {
      "symbol": "pcf8574p.kicad_sym",
      "footprint": "pcf8574p.kicad_mod",
      "model_3d": "pcf8574p-hero.glb",
      "model_3d_plain": "pcf8574p-etched.glb",
      "model_3d_step": "pcf8574p-etched.step",
      "model_3d_step_plain": "pcf8574p.step",
      "lbr": "pcf8574p.lbr"
    },
    "distributor_links": {
      "lcsc": "C398073"
    },
    "distributor_check": {
      "checked_at": "2026-10-15T18:07:41Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "A0",
        "type": "input",
        "description": "Hardware address input 0, one of three pins that set the device's I2C slave address (up to 8 PCF8574 devices on one bus)."
      },
      {
        "number": "2",
        "name": "A1",
        "type": "input",
        "description": "Hardware address input 1, one of three pins that set the device's I2C slave address (up to 8 PCF8574 devices on one bus)."
      },
      {
        "number": "3",
        "name": "A2",
        "type": "input",
        "description": "Hardware address input 2, one of three pins that set the device's I2C slave address (up to 8 PCF8574 devices on one bus)."
      },
      {
        "number": "4",
        "name": "P0",
        "type": "bidirectional",
        "description": "Quasi-bidirectional I/O 0 with latched output; LOW-level output current IOL is 10 mA min to 25 mA max at VOL = 1 V with VDD = 5 V, and it is HIGH at power-on."
      },
      {
        "number": "5",
        "name": "P1",
        "type": "bidirectional",
        "description": "Quasi-bidirectional I/O 1 with latched output; LOW-level output current IOL is 10 mA min to 25 mA max at VOL = 1 V with VDD = 5 V, and it is HIGH at power-on."
      },
      {
        "number": "6",
        "name": "P2",
        "type": "bidirectional",
        "description": "Quasi-bidirectional I/O 2 with latched output; LOW-level output current IOL is 10 mA min to 25 mA max at VOL = 1 V with VDD = 5 V, and it is HIGH at power-on."
      },
      {
        "number": "7",
        "name": "P3",
        "type": "bidirectional",
        "description": "Quasi-bidirectional I/O 3 with latched output; LOW-level output current IOL is 10 mA min to 25 mA max at VOL = 1 V with VDD = 5 V, and it is HIGH at power-on."
      },
      {
        "number": "8",
        "name": "VSS",
        "type": "power_in",
        "description": "Supply ground, 0 V reference for the device."
      },
      {
        "number": "9",
        "name": "P4",
        "type": "bidirectional",
        "description": "Quasi-bidirectional I/O 4 with latched output; LOW-level output current IOL is 10 mA min to 25 mA max at VOL = 1 V with VDD = 5 V, and it is HIGH at power-on."
      },
      {
        "number": "10",
        "name": "P5",
        "type": "bidirectional",
        "description": "Quasi-bidirectional I/O 5 with latched output; LOW-level output current IOL is 10 mA min to 25 mA max at VOL = 1 V with VDD = 5 V, and it is HIGH at power-on."
      },
      {
        "number": "11",
        "name": "P6",
        "type": "bidirectional",
        "description": "Quasi-bidirectional I/O 6 with latched output; LOW-level output current IOL is 10 mA min to 25 mA max at VOL = 1 V with VDD = 5 V, and it is HIGH at power-on."
      },
      {
        "number": "12",
        "name": "P7",
        "type": "bidirectional",
        "description": "Quasi-bidirectional I/O 7 with latched output; LOW-level output current IOL is 10 mA min to 25 mA max at VOL = 1 V with VDD = 5 V, and it is HIGH at power-on."
      },
      {
        "number": "13",
        "name": "INT",
        "type": "output",
        "description": "Open-drain interrupt output, active LOW, signalling a change on the port inputs to the microcontroller; minimum IOL is 1.6 mA at VOL = 0.4 V."
      },
      {
        "number": "14",
        "name": "SCL",
        "type": "input",
        "description": "I2C-bus serial clock line, which must be pulled up to the positive supply and runs at up to 100 kHz."
      },
      {
        "number": "15",
        "name": "SDA",
        "type": "bidirectional",
        "description": "I2C-bus serial data line, which must be pulled up to the positive supply and carries data in both directions."
      },
      {
        "number": "16",
        "name": "VDD",
        "type": "power_in",
        "description": "Supply voltage, specified from 2.5 V to 6.0 V."
      }
    ],
    "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": [
          "extractor flagged: The datasheet pin table gives signal names and functions but no ERC electrical types. Types were ass; The ordering table lists PCF8574P as DIP-16 (marking PCF8574). The pin numbers come from the DIP-16/"
        ],
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        "cost_usd": 0.0531,
        "at": "2026-10-15T18:07:23"
      },
      "datasheet": {
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        "pages": 18,
        "sha256": "b4f2128e4d380a5d",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 16,
        "described": 16,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
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        "units": "mm",
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        "seat": "body on z = 0, through-hole leads below",
        "extents_mm": [
          7.874,
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        "zmin_mm": -3.3,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "17a30b1f0ab3fd5384a1231e3c63c394888d5b952c542a8c189e023ed3467464",
        "checked": "2026-10-15",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "HGSEMI",
      "Package": "DIP-16",
      "Category": "Interface",
      "Pins": "16"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "b4f2128e4d380a5da3d36eca622195a0e3166b3ae06ce846f12b164e50055bab",
      "rows": [
        {
          "name": "Supply voltage",
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          "kind": "absolute_maximum",
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          "max": 7,
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        },
        {
          "name": "DC input current",
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          "unit": "mA",
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        {
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        {
          "name": "Supply current",
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          "name": "Total power dissipation",
          "symbol": "Ptot",
          "kind": "absolute_maximum",
          "unit": "mW",
          "min": null,
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          "max": 400,
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        {
          "name": "Power dissipation per output",
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        {
          "name": "Storage temperature",
          "symbol": "Tstg",
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          "unit": "℃",
          "min": -65,
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        {
          "name": "Operating ambient temperature",
          "symbol": "Tamb",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "",
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          "source": "datasheet"
        },
        {
          "name": "Lead temperature (soldering)",
          "symbol": "TL",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": null,
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        {
          "name": "Supply voltage",
          "symbol": "VDD",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 2.5,
          "typ": null,
          "max": 6,
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          "source": "datasheet"
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        {
          "name": "Supply current, operating mode",
          "symbol": "IDD",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 40,
          "max": 100,
          "conditions": "operating mode; VDD = 6 V; no load; VI = VDD or VSS; fSCL = 100 kHz",
          "source_page": 11,
          "source": "datasheet"
        },
        {
          "name": "Standby current",
          "symbol": "Istb",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 2.5,
          "max": 10,
          "conditions": "standby mode; VDD = 6 V; no load; VI = VDD or VSS",
          "source_page": 11,
          "source": "datasheet"
        },
        {
          "name": "Power-on reset voltage",
          "symbol": "VPOR",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 1.3,
          "max": 2.4,
          "conditions": "VDD = 6 V; no load; VI = VDD or VSS; note 1",
          "source_page": 11,
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        {
          "name": "LOW level input voltage (SCL, SDA)",
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          "kind": "electrical",
          "unit": "V",
          "min": -0.5,
          "typ": null,
          "max": null,
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          "source_page": 11,
          "source": "datasheet"
        },
        {
          "name": "LOW level output current (SDA)",
          "symbol": "IOL",
          "kind": "electrical",
          "unit": "mA",
          "min": 3,
          "typ": null,
          "max": null,
          "conditions": "VOL = 0.4 V",
          "source_page": 11,
          "source": "datasheet"
        },
        {
          "name": "Leakage current (SCL, SDA)",
          "symbol": "IL",
          "kind": "electrical",
          "unit": "µA",
          "min": -1,
          "typ": null,
          "max": 1,
          "conditions": "VI = VDD or VSS",
          "source_page": 11,
          "source": "datasheet"
        },
        {
          "name": "Input capacitance (SCL, SDA)",
          "symbol": "Ci",
          "kind": "electrical",
          "unit": "pF",
          "min": null,
          "typ": null,
          "max": 7,
          "conditions": "VI = VSS",
          "source_page": 11,
          "source": "datasheet"
        },
        {
          "name": "LOW level input voltage (I/Os)",
          "symbol": "VIL",
          "kind": "electrical",
          "unit": "V",
          "min": -0.5,
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        {
          "name": "Maximum allowed input current through protection diode",
          "symbol": "IIHL(max)",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
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          "max": 400,
          "conditions": "VI ≥ VDD or VI ≤ VSS",
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          "name": "LOW level output current (I/Os)",
          "symbol": "IOL",
          "kind": "electrical",
          "unit": "mA",
          "min": 10,
          "typ": 25,
          "max": null,
          "conditions": "VOL = 1 V; VDD = 5 V",
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          "source": "datasheet"
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        {
          "name": "HIGH level output current (I/Os)",
          "symbol": "IOH",
          "kind": "electrical",
          "unit": "µA",
          "min": 30,
          "typ": null,
          "max": 300,
          "conditions": "VOH = VSS",
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        {
          "name": "Input capacitance (I/Os)",
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          "kind": "electrical",
          "unit": "pF",
          "min": null,
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          "max": 10,
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        {
          "name": "Output capacitance (I/Os)",
          "symbol": "Co",
          "kind": "electrical",
          "unit": "pF",
          "min": null,
          "typ": null,
          "max": 10,
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        {
          "name": "Output data valid time",
          "symbol": "tpv",
          "kind": "timing",
          "unit": "µs",
          "min": null,
          "typ": null,
          "max": 4,
          "conditions": "CL ≤ 100 pF (see Figs 10 and 11)",
          "source_page": 12,
          "source": "datasheet"
        },
        {
          "name": "LOW level output current (INT)",
          "symbol": "IOL",
          "kind": "electrical",
          "unit": "mA",
          "min": 1.6,
          "typ": null,
          "max": null,
          "conditions": "VOL = 0.4 V",
          "source_page": 12,
          "source": "datasheet"
        },
        {
          "name": "Leakage current (INT)",
          "symbol": "IL",
          "kind": "electrical",
          "unit": "µA",
          "min": -1,
          "typ": null,
          "max": 1,
          "conditions": "VI = VDD or VSS",
          "source_page": 12,
          "source": "datasheet"
        },
        {
          "name": "Input data valid time",
          "symbol": "tiv",
          "kind": "timing",
          "unit": "µs",
          "min": null,
          "typ": null,
          "max": 4,
          "conditions": "CL ≤ 100 pF",
          "source_page": 12,
          "source": "datasheet"
        },
        {
          "name": "Reset delay time",
          "symbol": "tir",
          "kind": "timing",
          "unit": "µs",
          "min": null,
          "typ": null,
          "max": 4,
          "conditions": "CL ≤ 100 pF",
          "source_page": 12,
          "source": "datasheet"
        },
        {
          "name": "LOW level input voltage (A0 to A2)",
          "symbol": "VIL",
          "kind": "electrical",
          "unit": "V",
          "min": -0.5,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 12,
          "source": "datasheet"
        },
        {
          "name": "Input leakage current (A0 to A2)",
          "symbol": "ILI",
          "kind": "electrical",
          "unit": "nA",
          "min": -250,
          "typ": null,
          "max": 250,
          "conditions": "pin at VDD or VSS",
          "source_page": 12,
          "source": "datasheet"
        },
        {
          "name": "SCL clock frequency",
          "symbol": "fSCL",
          "kind": "timing",
          "unit": "kHz",
          "min": null,
          "typ": null,
          "max": 100,
          "conditions": "",
          "source_page": 13,
          "source": "datasheet"
        },
        {
          "name": "Tolerable spike width on bus",
          "symbol": "tSW",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": null,
          "max": 100,
          "conditions": "",
          "source_page": 13,
          "source": "datasheet"
        },
        {
          "name": "Bus free time",
          "symbol": "tBUF",
          "kind": "timing",
          "unit": "µs",
          "min": 4.7,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 13,
          "source": "datasheet"
        },
        {
          "name": "START condition set-up time",
          "symbol": "tSU;STA",
          "kind": "timing",
          "unit": "µs",
          "min": 4.7,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 13,
          "source": "datasheet"
        },
        {
          "name": "START condition hold time",
          "symbol": "tHD;STA",
          "kind": "timing",
          "unit": "µs",
          "min": 4,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 13,
          "source": "datasheet"
        },
        {
          "name": "SCL LOW time",
          "symbol": "tLOW",
          "kind": "timing",
          "unit": "µs",
          "min": 4.7,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 13,
          "source": "datasheet"
        },
        {
          "name": "SCL HIGH time",
          "symbol": "tHIGH",
          "kind": "timing",
          "unit": "µs",
          "min": 4,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 13,
          "source": "datasheet"
        },
        {
          "name": "SCL and SDA rise time",
          "symbol": "tr",
          "kind": "timing",
          "unit": "µs",
          "min": null,
          "typ": null,
          "max": 1,
          "conditions": "",
          "source_page": 13,
          "source": "datasheet"
        },
        {
          "name": "SCL and SDA fall time",
          "symbol": "tf",
          "kind": "timing",
          "unit": "µs",
          "min": null,
          "typ": null,
          "max": 0.3,
          "conditions": "",
          "source_page": 13,
          "source": "datasheet"
        },
        {
          "name": "Data set-up time",
          "symbol": "tSU;DAT",
          "kind": "timing",
          "unit": "ns",
          "min": 250,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 13,
          "source": "datasheet"
        },
        {
          "name": "Data hold time",
          "symbol": "tHD;DAT",
          "kind": "timing",
          "unit": "ns",
          "min": 0,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 13,
          "source": "datasheet"
        },
        {
          "name": "SCL LOW to data out valid",
          "symbol": "tVD;DAT",
          "kind": "timing",
          "unit": "µs",
          "min": null,
          "typ": null,
          "max": 3.4,
          "conditions": "",
          "source_page": 13,
          "source": "datasheet"
        },
        {
          "name": "STOP condition set-up time",
          "symbol": "tSU;STO",
          "kind": "timing",
          "unit": "µs",
          "min": 4,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 13,
          "source": "datasheet"
        },
        {
          "name": "HIGH level output current (I/Os)",
          "symbol": "IOHt",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": -1,
          "max": null,
          "conditions": "Transient pull-up current HIGH during acknowledge (see Fig.14); VOH = VSS; VDD = 2.5 V",
          "source_page": 12,
          "source": "datasheet"
        },
        {
          "name": "Input data set-up time",
          "symbol": "tsu",
          "kind": "timing",
          "unit": "µs",
          "min": null,
          "typ": 0,
          "max": null,
          "conditions": "CL ≤ 100 pF",
          "source_page": 12,
          "source": "datasheet"
        },
        {
          "name": "Input data hold time",
          "symbol": "th",
          "kind": "timing",
          "unit": "µs",
          "min": null,
          "typ": 4,
          "max": null,
          "conditions": "CL ≤ 100 pF",
          "source_page": 12,
          "source": "datasheet"
        }
      ]
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