π161U31

{
  "schema_version": 1,
  "type": "component",
  "slug": "161u31",
  "title": "π161U31",
  "brief": "2Pai Semi Digital Isolators, SOIC-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",
    "π161u31",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "π161U31",
    "manufacturer": "2Pai Semi",
    "package": "SOIC-16",
    "pin_count": 16,
    "category": "Interface ICs",
    "subcategory": "Digital Isolators",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/5cb4aff9a542ee02bb712f8324a18f54.pdf",
    "parts": {
      "symbol": "161u31.kicad_sym",
      "footprint": "161u31.kicad_mod",
      "model_3d": "161u31-hero.glb",
      "model_3d_plain": "161u31-etched.glb",
      "model_3d_step": "161u31-etched.step",
      "model_3d_step_plain": "161u31.step",
      "lbr": "161u31.lbr"
    },
    "distributor_links": {
      "lcsc": "C471607"
    },
    "distributor_check": {
      "checked_at": "2026-10-21T14:36:22Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VDD1",
        "type": "power_in",
        "description": "Supply voltage for isolator side 1, which operates from 3.0 V to 5.5 V."
      },
      {
        "number": "2",
        "name": "VIA",
        "type": "input",
        "description": "Logic input A on side 1; the high-level input must be at least 0.7×VDD1 and the low-level input at most 0.3×VDD1."
      },
      {
        "number": "3",
        "name": "VIB",
        "type": "input",
        "description": "Logic input B on side 1; the high-level input must be at least 0.7×VDD1 and the low-level input at most 0.3×VDD1."
      },
      {
        "number": "4",
        "name": "VIC",
        "type": "input",
        "description": "Logic input C on side 1; the high-level input must be at least 0.7×VDD1 and the low-level input at most 0.3×VDD1."
      },
      {
        "number": "5",
        "name": "VID",
        "type": "input",
        "description": "Logic input D on side 1; the high-level input must be at least 0.7×VDD1 and the low-level input at most 0.3×VDD1."
      },
      {
        "number": "6",
        "name": "VIE",
        "type": "input",
        "description": "Logic input E on side 1; the high-level input must be at least 0.7×VDD1 and the low-level input at most 0.3×VDD1."
      },
      {
        "number": "7",
        "name": "VOF",
        "type": "output",
        "description": "Logic output F on side 1, with a maximum average output current of ±6 mA (IOH −6 mA, IOL 6 mA)."
      },
      {
        "number": "8",
        "name": "GND1",
        "type": "power_in",
        "description": "Ground reference for isolator side 1."
      },
      {
        "number": "9",
        "name": "GND2",
        "type": "power_in",
        "description": "Ground reference for isolator side 2."
      },
      {
        "number": "10",
        "name": "VIF",
        "type": "input",
        "description": "Logic input F on side 2; the high-level input must be at least 0.7×VDD2 and the low-level input at most 0.3×VDD2."
      },
      {
        "number": "11",
        "name": "VOE",
        "type": "output",
        "description": "Logic output E on side 2, with a maximum average output current of ±6 mA (IOH −6 mA, IOL 6 mA)."
      },
      {
        "number": "12",
        "name": "VOD",
        "type": "output",
        "description": "Logic output D on side 2, with a maximum average output current of ±6 mA (IOH −6 mA, IOL 6 mA)."
      },
      {
        "number": "13",
        "name": "VOC",
        "type": "output",
        "description": "Logic output C on side 2, with a maximum average output current of ±6 mA (IOH −6 mA, IOL 6 mA)."
      },
      {
        "number": "14",
        "name": "VOB",
        "type": "output",
        "description": "Logic output B on side 2, with a maximum average output current of ±6 mA (IOH −6 mA, IOL 6 mA)."
      },
      {
        "number": "15",
        "name": "VOA",
        "type": "output",
        "description": "Logic output A on side 2, with a maximum average output current of ±6 mA (IOH −6 mA, IOL 6 mA)."
      },
      {
        "number": "16",
        "name": "VDD2",
        "type": "power_in",
        "description": "Supply voltage for isolator side 2, which operates from 3.0 V to 5.5 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 pin assignments were taken from the π161Uxx Pin Function Descriptions table on page 2. The pin-c; The datasheet gives the 3.0 V to 5.5 V supply range and the ±6 mA output current limits in the recom"
        ],
        "pages_sent": 16,
        "cost_usd": 0.0858,
        "at": "2026-10-21T14:31:49"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/5cb4aff9a542ee02bb712f8324a18f54.pdf",
        "pages": 16,
        "sha256": "d12e9cd6aa221f61",
        "source_tier": "lcsc"
      },
      "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": "161u31.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          9.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "d5eeddb4c0b304dc61950919b126fc61d7586abd5f16ab71a2a79759ec6498bf",
        "checked": "2026-10-21",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "161u31-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "d76767698add624a8b5ed22dffd1424fe9ca6b644d42c3c46913bad87bec5eb9",
        "checked": "2026-10-21",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "2Pai Semi",
      "Package": "SOIC-16",
      "Category": "Interface ICs",
      "Pins": "16"
    },
    "appearance": {
      "housing": {
        "quote": "In accordance with DIN V VDE V 0884-10, eachπ160U3x/π161U3x/π162U3x /π163U3x is proof tested by applying an insulation test voltage ≥ 1326 V peak for 1 sec (partial discharge detection limit = 5 pC); ",
        "page": 8,
        "doc": "ds.pdf",
        "material": "pC"
      },
      "version": 1,
      "datasheet_sha256": "d12e9cd6aa221f61a9792af80cc49f429173913d9a96741a2c9e5e00ae839220"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
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      "rows": [
        {
          "name": "Supply Voltages (VDD1-GND1, VDD2-GND2)",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.5,
          "typ": null,
          "max": 7,
          "conditions": "",
          "source_page": 4,
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        },
        {
          "name": "Input Voltages (VIA, VIB); max VDDx + 0.5 V",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.5,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Output Voltages (VOA, VOB); max VDDx + 0.5 V",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.5,
          "typ": null,
          "max": null,
          "conditions": "",
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        },
        {
          "name": "Average Output Current per Pin, Side 1",
          "symbol": "IO1",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": -10,
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        {
          "name": "Average Output Current per Pin, Side 2",
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          "unit": "mA",
          "min": -10,
          "typ": null,
          "max": 10,
          "conditions": "",
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          "source": "datasheet"
        },
        {
          "name": "Common-Mode Transients Immunity",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "kV/µs",
          "min": -150,
          "typ": null,
          "max": 150,
          "conditions": "See Figure21 for CMTI measurement",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Storage Temperature (TST) Range",
          "symbol": "TST",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Supply Voltage",
          "symbol": "VDDx",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 3,
          "typ": null,
          "max": 5.5,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "High Level Input Signal Voltage (min 0.7*VDDx; max VDDx)",
          "symbol": "VIH",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 0.7,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Low Level Input Signal Voltage (min 0; max 0.3*VDDx)",
          "symbol": "VIL",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 0,
          "typ": null,
          "max": 0.3,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "High Level Output Current",
          "symbol": "IOH",
          "kind": "recommended_operating",
          "unit": "mA",
          "min": -6,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Low Level Output Current",
          "symbol": "IOL",
          "kind": "recommended_operating",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 6,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Maximum Data Rate",
          "symbol": "",
          "kind": "recommended_operating",
          "unit": "Kbps",
          "min": 0,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Junction Temperature",
          "symbol": "TJ",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Ambient Operating Temperature",
          "symbol": "TA",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Minimum Pulse Width",
          "symbol": "PW",
          "kind": "timing",
          "unit": "us",
          "min": 6.5,
          "typ": null,
          "max": null,
          "conditions": "Within pulse width distortion (PWD) limit",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Propagation Delay Time (tpHL, tpLH)",
          "symbol": "tpHL, tpLH",
          "kind": "timing",
          "unit": "us",
          "min": null,
          "typ": 3,
          "max": 4.5,
          "conditions": "50% input to 50% output @ 5VDC supply",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Propagation Delay Time (tpHL, tpLH)",
          "symbol": "tpHL, tpLH",
          "kind": "timing",
          "unit": "us",
          "min": null,
          "typ": 3.2,
          "max": 4.8,
          "conditions": "50% input to 50% output @ 3.3VDC supply",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Pulse Width Distortion",
          "symbol": "PWD",
          "kind": "timing",
          "unit": "us",
          "min": 0,
          "typ": 0.02,
          "max": 0.2,
          "conditions": "@ 5VDC supply; |tpHL - tpLH|",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Part to Part Propagation Delay Skew",
          "symbol": "tPSK",
          "kind": "timing",
          "unit": "us",
          "min": null,
          "typ": null,
          "max": 0.3,
          "conditions": "Max difference between any two devices at same temperature, load and voltage; @ 5VDC supply",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Channel to Channel Propagation Delay Skew",
          "symbol": "tCSK",
          "kind": "timing",
          "unit": "us",
          "min": 0,
          "typ": null,
          "max": 0.2,
          "conditions": "Max difference between any two output channels in one device; @ 5VDC supply",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Output Signal Rise/Fall Time",
          "symbol": "tr/tf",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": null,
          "max": 1.5,
          "conditions": "10% to 90% signal terminated 50",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Common-Mode Transient Immunity",
          "symbol": "CMTI",
          "kind": "timing",
          "unit": "kV/µs",
          "min": 100,
          "typ": 150,
          "max": null,
          "conditions": "VIN = VDDx2 or 0V, VCM = 1000 V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "ESD (HBM - Human body model)",
          "symbol": "ESD",
          "kind": "electrical",
          "unit": "kV",
          "min": -8,
          "typ": null,
          "max": 8,
          "conditions": "All pins",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Rising Input Signal Voltage Threshold (min 0.6*VDDx; typ 0.7*VDDx)",
          "symbol": "VIT+",
          "kind": "electrical",
          "unit": "V",
          "min": 0.6,
          "typ": 0.7,
          "max": null,
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          "source_page": 5,
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        },
        {
          "name": "Falling Input Signal Voltage Threshold (min 0.3*VDDx; typ 0.4*VDDx)",
          "symbol": "VIT-",
          "kind": "electrical",
          "unit": "V",
          "min": 0.3,
          "typ": 0.4,
          "max": null,
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          "source": "datasheet"
        },
        {
          "name": "Low Level Output Voltage",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
          "min": 0,
          "typ": null,
          "max": 0.1,
          "conditions": "20 µA output current",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Low Level Output Voltage",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 0.1,
          "max": 0.2,
          "conditions": "2 mA output current",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Input Current per Signal Channel",
          "symbol": "IIN",
          "kind": "electrical",
          "unit": "µA",
          "min": -10,
          "typ": 0.5,
          "max": 10,
          "conditions": "0 V ≤ Signal voltage ≤ VDDX1",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "VDDx1 Undervoltage Rising Threshold",
          "symbol": "VDDxUV+",
          "kind": "electrical",
          "unit": "V",
          "min": 2.45,
          "typ": 2.65,
          "max": 2.9,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "VDDx1 Undervoltage Falling Threshold",
          "symbol": "VDDxUV−",
          "kind": "electrical",
          "unit": "V",
          "min": 2.3,
          "typ": 2.5,
          "max": 2.75,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Rated Dielectric Insulation Voltage (π16xU3x)",
          "symbol": "",
          "kind": "electrical",
          "unit": "V rms",
          "min": null,
          "typ": null,
          "max": 3000,
          "conditions": "1-minute duration",
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          "source": "datasheet"
        },
        {
          "name": "Quiescent Supply Current (π161Uxx @5VDC supply, side 1)",
          "symbol": "IDD1 (Q)",
          "kind": "electrical",
          "unit": "µA",
          "min": 536,
          "typ": 670,
          "max": 870,
          "conditions": "@ 5VDC Supply; 5V Input signal; CL = 0 pF",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Quiescent Supply Current (π161Uxx @5VDC supply, side 2)",
          "symbol": "IDD2 (Q)",
          "kind": "electrical",
          "unit": "µA",
          "min": 1949,
          "typ": 2436,
          "max": 3167,
          "conditions": "@ 5VDC Supply; 5V Input signal; CL = 0 pF",
          "source_page": 6,
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        },
        {
          "name": "Quiescent Supply Current (π161Uxx @5VDC supply, side 1)",
          "symbol": "IDD1 (Q)",
          "kind": "electrical",
          "unit": "µA",
          "min": 738,
          "typ": 923,
          "max": 1199,
          "conditions": "@ 5VDC Supply; 0V Input signal; CL = 0 pF",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Quiescent Supply Current (π161Uxx @5VDC supply, side 2)",
          "symbol": "IDD2 (Q)",
          "kind": "electrical",
          "unit": "µA",
          "min": 1847,
          "typ": 2309,
          "max": 3002,
          "conditions": "@ 5VDC Supply; 0V Input signal; CL = 0 pF",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Quiescent Supply Current (π161Uxx @3.3VDC supply, side 1)",
          "symbol": "IDD1 (Q)",
          "kind": "electrical",
          "unit": "µA",
          "min": 529,
          "typ": 662,
          "max": 860,
          "conditions": "@ 3.3VDC Supply; 3.3V Input signal; CL = 0 pF",
          "source_page": 6,
          "source": "datasheet"
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        {
          "name": "Quiescent Supply Current (π161Uxx @3.3VDC supply, side 2)",
          "symbol": "IDD2 (Q)",
          "kind": "electrical",
          "unit": "µA",
          "min": 1926,
          "typ": 2408,
          "max": 3130,
          "conditions": "@ 3.3VDC Supply; 3.3V Input signal; CL = 0 pF",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Quiescent Supply Current (π161Uxx @3.3VDC supply, side 1)",
          "symbol": "IDD1 (Q)",
          "kind": "electrical",
          "unit": "µA",
          "min": 630,
          "typ": 788,
          "max": 1024,
          "conditions": "@ 3.3VDC Supply; 0V Input signal; CL = 0 pF",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Quiescent Supply Current (π161Uxx @3.3VDC supply, side 2)",
          "symbol": "IDD2 (Q)",
          "kind": "electrical",
          "unit": "µA",
          "min": 1797,
          "typ": 2246,
          "max": 2920,
          "conditions": "@ 3.3VDC Supply; 0V Input signal; CL = 0 pF",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Total Supply Current vs Data Throughput (π161Uxx, 2 Kbps, side 1)",
          "symbol": "IDD1",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 0.79,
          "max": 1.18,
          "conditions": "@ 5VDC supply; 2 Kbps; CL = 0 pF",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Total Supply Current vs Data Throughput (π161Uxx, 50 Kbps, side 1)",
          "symbol": "IDD1",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 0.79,
          "max": 1.19,
          "conditions": "@ 5VDC supply; 50 Kbps; CL = 0 pF",
          "source_page": 7,
          "source": "datasheet"
        },
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