π120E31Q

{
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  "type": "component",
  "slug": "120e31q",
  "title": "π120E31Q",
  "brief": "2Pai Semi Digital Isolators, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
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    "communication interface chip-uart-485-232",
    "π120e31q",
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  "component": {
    "mpn": "π120E31Q",
    "manufacturer": "2Pai Semi",
    "package": "SOIC-8",
    "pin_count": 8,
    "category": "Communication Interface Chip/UART/485/232",
    "subcategory": "Digital Isolators",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/0ce5fc54bef52c7f88419fe1dc577c35.pdf",
    "parts": {
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      "model_3d_step_plain": "120e31q.step",
      "lbr": "120e31q.lbr"
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    "distributor_links": {
      "lcsc": "C3445868"
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      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
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      "mouser": {
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    },
    "pins": [
      {
        "number": "1",
        "name": "VDD1",
        "type": "power_in",
        "description": "Supply voltage for isolator side 1, operating range 3 V to 5.5 V (absolute maximum 7.0 V) referenced to GND1."
      },
      {
        "number": "2",
        "name": "VIA",
        "type": "input",
        "description": "Logic input A on side 1, with VIH of 0.7*VDD1 minimum and VIL of 0.3*VDD1 maximum; default output is high if left open (fail-safe high, '1' variant)."
      },
      {
        "number": "3",
        "name": "VIB",
        "type": "input",
        "description": "Logic input B on side 1, with VIH of 0.7*VDD1 minimum and VIL of 0.3*VDD1 maximum; default output is high if left open (fail-safe high, '1' variant)."
      },
      {
        "number": "4",
        "name": "GND1",
        "type": "power_in",
        "description": "Ground 1, the ground reference for isolator side 1."
      },
      {
        "number": "5",
        "name": "GND2",
        "type": "power_in",
        "description": "Ground 2, the ground reference for isolator side 2."
      },
      {
        "number": "6",
        "name": "VOB",
        "type": "output",
        "description": "Logic output B on side 2, rated for ±6 mA recommended output current (±10 mA absolute maximum)."
      },
      {
        "number": "7",
        "name": "VOA",
        "type": "output",
        "description": "Logic output A on side 2, rated for ±6 mA recommended output current (±10 mA absolute maximum)."
      },
      {
        "number": "8",
        "name": "VDD2",
        "type": "power_in",
        "description": "Supply voltage for isolator side 2, operating range 3 V to 5.5 V (absolute maximum 7.0 V) referenced to GND2."
      }
    ],
    "provenance": {
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        "guard_notes": [
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        "at": "2026-10-27T00:50:49"
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      "pins": {
        "total": 8,
        "described": 8,
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  "metadata": {
    "specs": {
      "Manufacturer": "2Pai Semi",
      "Package": "SOIC-8",
      "Category": "Communication Interface Chip/UART/485/232",
      "Pins": "8"
    },
    "appearance": {
      "housing": {
        "quote": "In accordance with DIN V VDE V 0884-11, each π120E3x/π121E3x/π122E3x is proof tested by applying an insulation test voltage ≥ 848 V peak for 1 sec (partial discharge detection limit = 5 pC); each π120",
        "page": 9,
        "doc": "ds.pdf",
        "material": "pC"
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          "conditions": "TA = 25°C",
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          "name": "Supply Voltage",
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        {
          "name": "Data Rate",
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          "min": 0,
          "typ": null,
          "max": 200,
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        {
          "name": "Junction Temperature",
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          "min": -40,
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          "conditions": "",
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        {
          "name": "Ambient Operating Temperature",
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          "min": -40,
          "typ": null,
          "max": 125,
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        {
          "name": "Minimum Pulse Width",
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          "kind": "timing",
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          "min": null,
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          "name": "Maximum Data Rate",
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        {
          "name": "Propagation Delay Time",
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          "max": 12.5,
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          "min": 6.5,
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          "max": 13.5,
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        {
          "name": "Pulse Width Distortion",
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          "name": "Pulse Width Distortion",
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          "name": "Part to Part Propagation Delay Skew",
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        {
          "name": "Channel to Channel Propagation Delay Skew",
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        {
          "name": "Channel to Channel Propagation Delay Skew",
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          "max": 2,
          "conditions": "@ 3.3VDC supply",
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          "source": "datasheet"
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        {
          "name": "Output Signal Rise/Fall Time",
          "symbol": "tr/tf",
          "kind": "timing",
          "unit": "ns",
          "min": null,
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          "max": null,
          "conditions": "See Figure 13",
          "source_page": 5,
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        {
          "name": "Common-Mode Transient Immunity",
          "symbol": "CMTI",
          "kind": "electrical",
          "unit": "kV/µs",
          "min": null,
          "typ": 75,
          "max": null,
          "conditions": "VIN = VDDx or 0V, VCM = 1000 V",
          "source_page": 5,
          "source": "datasheet"
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        {
          "name": "Jitter",
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          "kind": "timing",
          "unit": "ps p-p",
          "min": null,
          "typ": 120,
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          "name": "Jitter",
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          "name": "ESD (HBM)",
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          "name": "Low Level Output Voltage",
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          "max": 0.1,
          "conditions": "20 µA output current",
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        {
          "name": "Low Level Output Voltage",
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          "name": "VDDx Undervoltage Rising Threshold",
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        {
          "name": "VDDx Undervoltage Falling Threshold",
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          "unit": "V",
          "min": 2.3,
          "typ": 2.6,
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          "name": "VDDx Hysteresis",
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        {
          "name": "Dynamic Input Supply Current per Channel",
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          "kind": "electrical",
          "unit": "µA/Mbps",
          "min": null,
          "typ": 9,
          "max": null,
          "conditions": "Inputs switching, 50% duty cycle square wave, CL = 0 pF @ 5VDC Supply",
          "source_page": 5,
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          "name": "Dynamic Output Supply Current per Channel",
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          "kind": "electrical",
          "unit": "µA/Mbps",
          "min": null,
          "typ": 38,
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          "typ": 5,
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          "conditions": "Inputs switching, 50% duty cycle square wave, CL = 0 pF @ 3.3VDC Supply",
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          "name": "Dynamic Output Supply Current per Channel",
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          "min": null,
          "typ": 23,
          "max": null,
          "conditions": "Inputs switching, 50% duty cycle square wave, CL = 0 pF @ 3.3VDC Supply",
          "source_page": 5,
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          "name": "Quiescent Supply Current, Side 1 (π120E3x)",
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          "kind": "electrical",
          "unit": "mA",
          "min": 0.06,
          "typ": 0.08,
          "max": 0.1,
          "conditions": "5VDC, VI=0V for π12xEx0",
          "source_page": 6,
          "source": "datasheet"
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          "name": "Quiescent Supply Current, Side 2 (π120E3x)",
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          "kind": "electrical",
          "unit": "mA",
          "min": 0.78,
          "typ": 0.98,
          "max": 1.27,
          "conditions": "5VDC, VI=5V for π12xEx1",
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          "source": "datasheet"
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        {
          "name": "Quiescent Supply Current, Side 1 (π120E3x)",
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          "unit": "mA",
          "min": 0.16,
          "typ": 0.2,
          "max": 0.26,
          "conditions": "5VDC, VI=5V for π12xEx0",
          "source_page": 6,
          "source": "datasheet"
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        {
          "name": "Quiescent Supply Current, Side 2 (π120E3x)",
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          "min": 0.74,
          "typ": 0.92,
          "max": 1.2,
          "conditions": "5VDC, VI=0V for π12xEx1",
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          "name": "Quiescent Supply Current, Side 1 (π120E3x)",
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          "source_page": 7,
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          "name": "Quiescent Supply Current, Side 2 (π120E3x)",
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          "unit": "mA",
          "min": 0.77,
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          "name": "Quiescent Supply Current, Side 1 (π120E3x)",
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          "conditions": "3.3VDC, VI=0V for π12xEx1",
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          "name": "Rated Dielectric Insulation Voltage",
          "symbol": "",
          "kind": "electrical",
          "unit": "V rms",
          "min": null,
          "typ": 3000,
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          "name": "Minimum External Air Gap (Clearance)",
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          "typ": null,
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        {
          "name": "IC Junction to Ambient Thermal Resistance",
          "symbol": "θJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
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