SI8621EC-B-IS

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  "slug": "si8621ec-b-is",
  "title": "SI8621EC-B-IS",
  "brief": "Skyworks Solutions 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",
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    "signal isolation devices",
    "si8621ec-b-is",
    "factory-2.0.0",
    "extractor-text"
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    "mpn": "SI8621EC-B-IS",
    "manufacturer": "Skyworks Solutions",
    "package": "SOIC-8",
    "pin_count": 8,
    "category": "Signal Isolation Devices",
    "subcategory": "Digital Isolators",
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      "lbr": "si8621ec-b-is.lbr"
    },
    "distributor_links": {
      "lcsc": "C7010821",
      "mouser": "634-SI8621EC-B-IS"
    },
    "distributor_check": {
      "checked_at": "2026-10-19T08:55:35Z",
      "source": "Component Ocean /api/assign-pns",
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    "pins": [
      {
        "number": "1",
        "name": "VDD1",
        "type": "power_in",
        "description": "Side 1 power supply; the powered state is defined as 2.5 V < VDD < 5.5 V, and the device requires a 0.1 µF bypass capacitor between VDD1 and GND1."
      },
      {
        "number": "2",
        "name": "A1",
        "type": "bidirectional",
        "description": "Side 1 digital input or output with Schmitt-trigger inputs."
      },
      {
        "number": "3",
        "name": "A2",
        "type": "bidirectional",
        "description": "Side 1 digital input or output on the Si862x family (not present on Si861x, where this pin is NA)."
      },
      {
        "number": "4",
        "name": "GND1",
        "type": "power_in",
        "description": "Side 1 ground."
      },
      {
        "number": "5",
        "name": "GND2",
        "type": "power_in",
        "description": "Side 2 ground."
      },
      {
        "number": "6",
        "name": "B2",
        "type": "bidirectional",
        "description": "Side 2 digital input or output on the Si862x family (not present on Si861x, where this pin is NA)."
      },
      {
        "number": "7",
        "name": "B1",
        "type": "bidirectional",
        "description": "Side 2 digital input or output with Schmitt-trigger inputs."
      },
      {
        "number": "8",
        "name": "VDD2",
        "type": "power_in",
        "description": "Side 2 power supply; the powered state is defined as 2.5 V < VDD < 5.5 V, and the device requires a 0.1 µF bypass capacitor between VDD2 and GND2."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
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        "guard_notes": [
          "extractor flagged: The SOIC-8 pin table has separate columns for Si861x and Si862x. SI8621 is an Si862x part, so I used; The datasheet gives no KiCad ERC type for the digital I/O pins; they are labeled only 'Digital I/O'."
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        "at": "2026-10-19T08:52:42"
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      "Package": "SOIC-8",
      "Category": "Signal Isolation Devices",
      "Pins": "8"
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        "quote": "2. The recommended card reflow profile is per the JEDEC/IPC J-STD-020D specification for Small Body Components.",
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          "name": "Positive-Going Input Threshold",
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        {
          "name": "Input Hysteresis",
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          "name": "High Level Input Voltage",
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          "name": "Low Level Output Voltage",
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          "name": "Input Leakage Current (Si86xxxB/C/D variant)",
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        {
          "name": "Output Impedance tolerance (nominal approx. 50 Ω)",
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        {
          "name": "DC Supply Current VDD1 (Si8621 Ex)",
          "symbol": "",
          "kind": "electrical",
          "unit": "mA",
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        {
          "name": "DC Supply Current VDD2 (Si8621 Ex)",
          "symbol": "",
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        {
          "name": "DC Supply Current VDD1 (Si8621 Ex)",
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          "name": "DC Supply Current VDD2 (Si8621 Ex)",
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          "name": "1 Mbps Supply Current VDD1 (Si8621)",
          "symbol": "",
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          "conditions": "All inputs = 500 kHz square wave, CL = 15 pF on all outputs",
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          "name": "1 Mbps Supply Current VDD2 (Si8621)",
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          "name": "10 Mbps Supply Current VDD1 (Si8621)",
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          "name": "10 Mbps Supply Current VDD2 (Si8621)",
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          "conditions": "All inputs = 5 MHz square wave, CL = 15 pF on all outputs",
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          "name": "100 Mbps Supply Current VDD1 (Si8621)",
          "symbol": "",
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          "name": "100 Mbps Supply Current VDD2 (Si8621)",
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          "conditions": "All inputs = 50 MHz square wave, CL = 15 pF on all outputs",
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          "name": "Data Rate",
          "symbol": "",
          "kind": "timing",
          "unit": "Mbps",
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          "name": "Minimum Pulse Width",
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          "name": "Propagation Delay",
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          "min": 5,
          "typ": 8,
          "max": 13,
          "conditions": "See Figure 4.1 Propagation Delay Timing",
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          "name": "Pulse Width Distortion",
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          "name": "Propagation Delay Skew (P-P)",
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          "name": "Channel-Channel Skew",
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          "name": "Output Rise Time",
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          "name": "Output Fall Time",
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          "name": "Common Mode Transient Immunity (Si86xxxB/C/D)",
          "symbol": "CMTI",
          "kind": "electrical",
          "unit": "kV/µs",
          "min": 35,
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          "name": "Start-up Time",
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          "name": "Supply Voltage VDD1",
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          "name": "Supply Voltage VDD2",
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          "name": "Storage Temperature",
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          "name": "Junction Temperature",
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          "name": "Supply Voltage",
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          "min": -0.5,
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          "max": 7,
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          "name": "Input Voltage",
          "symbol": "VI",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.5,
          "typ": null,
          "max": null,
          "conditions": "Printed maximum is VDD + 0.5",
          "source_page": 27,
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          "name": "Output Voltage",
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          "unit": "V",
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          "conditions": "Printed maximum is VDD + 0.5",
          "source_page": 27,
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          "name": "Output Current Drive Channel",
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          "unit": "mA",
          "min": null,
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          "max": 10,
          "conditions": "",
          "source_page": 27,
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        {
          "name": "Lead Solder Temperature (10 s)",
          "symbol": "",
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          "unit": "°C",
          "min": null,
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          "max": 260,
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          "name": "Maximum Isolation (Input to Output) (1 sec), SOIC-8 & DFN-8",
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          "name": "Output High Level Voltage",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 4.8,
          "max": null,
          "conditions": "loh = –4 mA",
          "source_page": 11,
          "source": "datasheet"
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        {
          "name": "IC Junction-to-Air Thermal Resistance (SOIC-8)",
          "symbol": "θJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 140,
          "max": null,
          "conditions": "SOIC-8 column of Table 4.10",
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