PCF8591

{
  "schema_version": 1,
  "type": "component",
  "slug": "pcf8591",
  "title": "PCF8591",
  "brief": "NXP 8-bit ADC and DAC with I2C, SOIC-16. Four-channel ADC plus one DAC output on one bus. Datasheet-verified.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "data-converter",
    "adc",
    "dac",
    "i2c",
    "soic-16",
    "nxp"
  ],
  "component": {
    "mpn": "PCF8591",
    "manufacturer": "NXP",
    "package": "SOIC-16",
    "pin_count": 16,
    "category": "Data Converter",
    "subcategory": "ADC + DAC",
    "datasheet": "https://www.nxp.com/docs/en/data-sheet/PCF8591.pdf",
    "parts": {
      "symbol": "pcf8591.kicad_sym",
      "footprint": "pcf8591.kicad_mod",
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      "model_3d_plain": "pcf8591.glb",
      "model_3d_step": "pcf8591-etched.step",
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      "lbr": "pcf8591.lbr"
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    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "AIN0",
        "type": "input",
        "description": "Analog input channel 0 to the A/D converter. Selectable as single-ended or differential input via the control byte."
      },
      {
        "number": "2",
        "name": "AIN1",
        "type": "input",
        "description": "Analog input channel 1 to the A/D converter. Selectable as single-ended or differential input via the control byte."
      },
      {
        "number": "3",
        "name": "AIN2",
        "type": "input",
        "description": "Analog input channel 2 to the A/D converter. Selectable as single-ended or differential input via the control byte."
      },
      {
        "number": "4",
        "name": "AIN3",
        "type": "input",
        "description": "Analog input channel 3 to the A/D converter. Selectable as single-ended or differential input via the control byte."
      },
      {
        "number": "5",
        "name": "A0",
        "type": "input",
        "description": "Hardware slave address bit 0. Tied to VSS or VDD to program the I2C slave address (LSB of hardware address)."
      },
      {
        "number": "6",
        "name": "A1",
        "type": "input",
        "description": "Hardware slave address bit 1. Tied to VSS or VDD to program the I2C slave address."
      },
      {
        "number": "7",
        "name": "A2",
        "type": "input",
        "description": "Hardware slave address bit 2. Tied to VSS or VDD to program the I2C slave address (MSB of hardware address)."
      },
      {
        "number": "8",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground supply / digital ground reference (0 V)."
      },
      {
        "number": "9",
        "name": "SDA",
        "type": "bidirectional",
        "description": "I2C-bus serial data input/output line. Open-drain; requires an external pull-up resistor to VDD."
      },
      {
        "number": "10",
        "name": "SCL",
        "type": "input",
        "description": "I2C-bus serial clock input from the master. Requires an external pull-up resistor to VDD."
      },
      {
        "number": "11",
        "name": "OSC",
        "type": "bidirectional",
        "description": "Oscillator input/output. When the internal oscillator is used (EXT tied to VSS), OSC provides the oscillator frequency output; when EXT is tied to VDD, OSC becomes the external clock input."
      },
      {
        "number": "12",
        "name": "EXT",
        "type": "input",
        "description": "External/internal oscillator select. Tie to VSS to enable the internal oscillator; tie to VDD to disable the internal oscillator and use an external clock applied at OSC."
      },
      {
        "number": "13",
        "name": "AGND",
        "type": "power_in",
        "description": "Analog ground supply for the ADC/DAC resistor divider chain. Must be connected to the system analog ground; may sit at a DC offset with respect to VSS."
      },
      {
        "number": "14",
        "name": "VREF",
        "type": "input",
        "description": "Voltage reference input for the on-chip ADC/DAC resistor divider chain. Sets the analog full-scale span between AGND and VREF; must be kept stable during conversion."
      },
      {
        "number": "15",
        "name": "AOUT",
        "type": "output",
        "description": "Analog output from the on-chip 8-bit D/A converter. Buffered by an auto-zeroed unity-gain amplifier; high-impedance when the analog-output-enable flag in the control register is 0."
      },
      {
        "number": "16",
        "name": "VDD",
        "type": "power_in",
        "description": "Positive supply voltage, 2.5 V to 6.0 V."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://www.nxp.com/docs/en/data-sheet/PCF8591.pdf",
        "pages": 31,
        "sha256": "b89feb48ffdbebfe",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 16,
        "described": 16,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
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      "footprint": "viewers/footprint.html"
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        "units": "mm",
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        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
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        "checked": "2026-10-07",
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  },
  "metadata": {
    "specs": {
      "Type": "8-bit ADC (4-ch) + 8-bit DAC",
      "Interface": "I2C",
      "ADC inputs": "4 single-ended or 2 differential",
      "DAC": "1 analog output (AOUT)",
      "Reference": "External (VREF)",
      "Addresses": "8 (A0-A2)",
      "Supply": "2.5-6 V",
      "Package": "SOIC-16"
    }
  },
  "sections": [
    "hero",
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    "breadcrumbs",
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  "discovery_triggers": [
    "pcf8591",
    "i2c adc dac",
    "8-bit adc dac module",
    "4 channel adc with dac"
  ],
  "discovery_pitch": "NXP PCF8591 8-bit ADC + DAC with I2C (SOIC-16) with datasheet-verified pinout, KiCad symbol/footprint/3D, and full provenance.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
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  "variants": [
    {
      "mpn": "PCF8591T (SOIC-16)",
      "kind": "packaging"
    },
    {
      "mpn": "PCF8591P (DIP-16)",
      "kind": "packaging"
    },
    {
      "mpn": "PCF8591TS (SSOP-20)",
      "kind": "packaging"
    }
  ]
}