SI8400AB-B-IS

{
  "schema_version": 1,
  "type": "component",
  "slug": "si8400ab-b-is",
  "title": "SI8400AB-B-IS",
  "brief": "Skyworks Solutions I2C 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": [
    "component",
    "signal isolation devices",
    "si8400ab-b-is",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "SI8400AB-B-IS",
    "manufacturer": "Skyworks Solutions",
    "package": "SOIC-8",
    "pin_count": 8,
    "category": "Signal Isolation Devices",
    "subcategory": "I2C Isolators",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/a10d8e436293ea12f65df4fdb070ee7c.pdf",
    "parts": {
      "symbol": "si8400ab-b-is.kicad_sym",
      "footprint": "si8400ab-b-is.kicad_mod",
      "model_3d": "si8400ab-b-is-hero.glb",
      "model_3d_plain": "si8400ab-b-is-etched.glb",
      "model_3d_step": "si8400ab-b-is-etched.step",
      "model_3d_step_plain": "si8400ab-b-is.step",
      "lbr": "si8400ab-b-is.lbr"
    },
    "distributor_links": {
      "lcsc": "C7011630",
      "digikey": "SI8400AB-B-IS-ND",
      "mouser": "634-SI8400AB-B-IS"
    },
    "distributor_check": {
      "checked_at": "2026-10-31T02:04:40Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "SI8400AB-B-IS-ND",
        "status": "found",
        "lifecycle": "Not For New Designs"
      },
      "mouser": {
        "pn": "634-SI8400AB-B-IS",
        "status": "found",
        "lifecycle": "Not Recommended for New Designs"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "AVDD",
        "type": "power_in",
        "description": "Side A power supply terminal; connect to a source of 3.0 to 5.5 V."
      },
      {
        "number": "2",
        "name": "ASDA",
        "type": "bidirectional",
        "description": "Side A data (open drain) input or output."
      },
      {
        "number": "3",
        "name": "ASCL",
        "type": "bidirectional",
        "description": "Side A clock input or output; open drain I/O for Si8400/01."
      },
      {
        "number": "4",
        "name": "AGND",
        "type": "power_in",
        "description": "Side A ground terminal."
      },
      {
        "number": "5",
        "name": "BGND",
        "type": "power_in",
        "description": "Side B ground terminal."
      },
      {
        "number": "6",
        "name": "BSCL",
        "type": "bidirectional",
        "description": "Side B clock input or output; open drain I/O for Si8400/01."
      },
      {
        "number": "7",
        "name": "BSDA",
        "type": "bidirectional",
        "description": "Side B data (open drain) input or output."
      },
      {
        "number": "8",
        "name": "BVDD",
        "type": "power_in",
        "description": "Side B power supply terminal; connect to a source of 3.0 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: Pin 3 (ASCL) and pin 6 (BSCL) are shared across Si8400/01/02 in the source table. The Si8402 variant; The datasheet ordering guide lists SI8400AB-B-IS as Revision B, 2.5 kVRMS, NB SOIC-8 (alternative pa"
        ],
        "pages_sent": 17,
        "cost_usd": 0.0751,
        "at": "2026-10-31T02:04:25"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/a10d8e436293ea12f65df4fdb070ee7c.pdf",
        "pages": 34,
        "sha256": "42eb9c2871c52c24",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 8,
        "described": 8,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "si8400ab-b-is.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          4.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "07f46cff378d30e6c27dfd5a03092c795323f86d91c71fc7e743f4f418dc553a",
        "checked": "2026-10-31",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "si8400ab-b-is-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          4.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "da8f8734814714976a33a7fa7695a081da0a4beee86e0ce507b8bfffd0e0ff26",
        "checked": "2026-10-31",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ],
    "package_dims": {
      "package_code": "NB SOIC-8",
      "source_page": 26,
      "D": {
        "nom_mm": 4.9,
        "range_mm": [
          4.8,
          5
        ]
      },
      "E1": {
        "nom_mm": 3.9,
        "range_mm": [
          3.8,
          4
        ]
      },
      "E": {
        "nom_mm": 6,
        "range_mm": [
          5.8,
          6.2
        ]
      },
      "e": {
        "nom_mm": 1.27,
        "range_mm": [
          null,
          null
        ]
      },
      "A": {
        "nom_mm": 1.55,
        "range_mm": [
          1.35,
          1.75
        ]
      },
      "source": "datasheet package drawing, every number found on its page (extract_pins --task dims)",
      "model_check": {
        "file": "si8400ab-b-is.step",
        "verdict": "PASS",
        "reasons": [
          "height and body within the datasheet's package drawing"
        ],
        "by": "factory/package_fit.py"
      }
    }
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Skyworks Solutions",
      "Package": "SOIC-8",
      "Category": "Signal Isolation Devices",
      "Pins": "8"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "42eb9c2871c52c24405beb9271fe3143d5482ac997ce1917c62f2a135413f488",
      "rows": [
        {
          "name": "Storage Temperature",
          "symbol": "TSTG",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Ambient Temperature Under Bias",
          "symbol": "TA",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Supply Voltage (Revision B)",
          "symbol": "VDD",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.5,
          "typ": null,
          "max": 6,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Input Voltage",
          "symbol": "VI",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.5,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Output Voltage",
          "symbol": "VO",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.5,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Side A output current drive (I2C channels)",
          "symbol": "IO",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": -15,
          "typ": null,
          "max": 15,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Side B output current drive (I2C channels)",
          "symbol": "IO",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": -75,
          "typ": null,
          "max": 75,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Lead Solder Temperature",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 260,
          "conditions": "10 s",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Maximum Isolation Voltage",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "VRMS",
          "min": null,
          "typ": null,
          "max": 3600,
          "conditions": "1 s",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Maximum Working Insulation Voltage",
          "symbol": "VIORM",
          "kind": "absolute_maximum",
          "unit": "V peak",
          "min": null,
          "typ": null,
          "max": 560,
          "conditions": "",
          "source_page": 10,
          "source": "datasheet"
        },
        {
          "name": "AVDD current",
          "symbol": "Idda",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 4.2,
          "max": 6.3,
          "conditions": "All channels = 0 dc",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "BVDD current",
          "symbol": "Iddb",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 3.9,
          "max": 5.9,
          "conditions": "All channels = 0 dc",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "AVDD current",
          "symbol": "Idda",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 2.3,
          "max": 3.5,
          "conditions": "All channels = 1 dc",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "BVDD current",
          "symbol": "Iddb",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 1.9,
          "max": 2.9,
          "conditions": "All channels = 1 dc",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "AVDD current",
          "symbol": "Idda",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 3.2,
          "max": 4.8,
          "conditions": "All channels = 1.7 MHz",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "BVDD current",
          "symbol": "Iddb",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 2.9,
          "max": 4.4,
          "conditions": "All channels = 1.7 MHz",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Logic Input Threshold (Side A)",
          "symbol": "I2CVT",
          "kind": "electrical",
          "unit": "mV",
          "min": 450,
          "typ": 550,
          "max": 650,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Logic Low Output Voltage (Side A)",
          "symbol": "I2CVOL",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": null,
          "max": 910,
          "conditions": "ISDAA = ISCLA = 3.0 mA",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Logic Low Output Voltage (Side A)",
          "symbol": "I2CVOL",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": null,
          "max": 825,
          "conditions": "ISDAA = ISCLA = 0.5 mA",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Logic Low Output Voltage (Side A), full temperature range",
          "symbol": "I2CVOL",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": null,
          "max": 955,
          "conditions": "TA = -40 to 125 °C, ISDAA = ISCLA = 3.0 mA (Table 3 note 3)",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Logic Low Output Voltage (Side A), full temperature range",
          "symbol": "I2CVOL",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": null,
          "max": 875,
          "conditions": "TA = -40 to 125 °C, ISDAA = ISCLA = 0.5 mA (Table 3 note 3)",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Input/Output Logic Low Level Difference (Side A)",
          "symbol": "I2CV",
          "kind": "electrical",
          "unit": "mV",
          "min": 50,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Logic Low Input Voltage (Side B)",
          "symbol": "I2CVIL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.8,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Logic High Input Voltage (Side B)",
          "symbol": "I2CVIH",
          "kind": "electrical",
          "unit": "V",
          "min": 2,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Logic Low Output Voltage (Side B)",
          "symbol": "I2CVOL",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": null,
          "max": 400,
          "conditions": "ISCLB = 35 mA",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "SCL and SDA Logic High Leakage (Side A)",
          "symbol": "Isdaa, Iscla",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 2,
          "max": 10,
          "conditions": "SDAA, SCLA = VSSA",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "SCL and SDA Logic High Leakage (Side B)",
          "symbol": "Isdab, Isclb",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 2,
          "max": 10,
          "conditions": "SDAB, SCLB = VSSB",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "VDD Undervoltage Threshold",
          "symbol": "VDDUV+",
          "kind": "electrical",
          "unit": "V",
          "min": 2.15,
          "typ": 2.3,
          "max": 2.5,
          "conditions": "AVDD, BVDD rising",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "VDD Negative-going Lockout Hysteresis",
          "symbol": "VDDH-",
          "kind": "electrical",
          "unit": "mV",
          "min": 45,
          "typ": 75,
          "max": 95,
          "conditions": "AVDD, BVDD falling",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Start-up Time",
          "symbol": "tSTART",
          "kind": "timing",
          "unit": "µs",
          "min": null,
          "typ": 15,
          "max": 40,
          "conditions": "",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Maximum I2C bus Frequency",
          "symbol": "Fmax",
          "kind": "timing",
          "unit": "MHz",
          "min": null,
          "typ": null,
          "max": 1.7,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Propagation Delay, Side A to side B rising (5 V)",
          "symbol": "Tphab",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 25,
          "max": 29,
          "conditions": "5 V operation; no bus capacitance, R1 = 1400, R2 = 499",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Propagation Delay, Side A to side B falling (5 V)",
          "symbol": "Tplab",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 15,
          "max": 22,
          "conditions": "5 V operation; no bus capacitance, R1 = 1400, R2 = 499",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Propagation Delay, Side B to side A rising (5 V)",
          "symbol": "Tphba",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 20,
          "max": 30,
          "conditions": "5 V operation; no bus capacitance, R1 = 1400, R2 = 499",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Propagation Delay, Side B to side A falling (5 V)",
          "symbol": "Tplba",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 9,
          "max": 12,
          "conditions": "5 V operation; no bus capacitance, R1 = 1400, R2 = 499",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Propagation Delay, Side A to side B rising (3.3 V)",
          "symbol": "Tphab",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 28,
          "max": 35,
          "conditions": "3.3 V operation; R1 = 806, R2 = 499",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Propagation Delay, Side A to side B falling (3.3 V)",
          "symbol": "Tplab",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 13,
          "max": 18,
          "conditions": "3.3 V operation; R1 = 806, R2 = 499",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Propagation Delay, Side B to side A rising (3.3 V)",
          "symbol": "Tphba",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 20,
          "max": 40,
          "conditions": "3.3 V operation; R1 = 806, R2 = 499",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Propagation Delay, Side B to side A falling (3.3 V)",
          "symbol": "Tplba",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 10,
          "max": 15,
          "conditions": "3.3 V operation; R1 = 806, R2 = 499",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Pulse Width Distortion, Side A low to Side B low (5 V)",
          "symbol": "PWDAB",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 9,
          "max": 15,
          "conditions": "5 V operation; no bus capacitance, R1 = 1400, R2 = 499",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Pulse Width Distortion, Side B low to Side A low (5 V)",
          "symbol": "PWDBA",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 11,
          "max": 20,
          "conditions": "5 V operation; no bus capacitance, R1 = 1400, R2 = 499",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Pulse Width Distortion, Side A low to Side B low (3.3 V)",
          "symbol": "PWDAB",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 15,
          "max": 22,
          "conditions": "3.3 V operation; R1 = 806, R2 = 499",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Pulse Width Distortion, Side B low to Side A low (3.3 V)",
          "symbol": "PWDBA",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 11,
          "max": 30,
          "conditions": "3.3 V operation; R1 = 806, R2 = 499",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Case Temperature (safety limiting)",
          "symbol": "TS",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "NB SOIC-8",
          "source_page": 10,
          "source": "datasheet"
        },
        {
          "name": "Safety Input Current (NB SOIC-8)",
          "symbol": "IS",
          "kind": "absolute_maximum",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 160,
          "conditions": "AVDD, BVDD = 5.5 V, TJ = 150 °C, TA = 25 °C; JA = 140 °C/W (NB SOIC-8)",
          "source_page": 10,
          "source": "datasheet"
        },
        {
          "name": "Device Power Dissipation (NB SOIC-8)",
          "symbol": "PD",
          "kind": "absolute_maximum",
          "unit": "W",
          "min": null,
          "typ": null,
          "max": 220,
          "conditions": "",
          "source_page": 10,
          "source": "datasheet"
        },
        {
          "name": "Supply Voltage (AVDD, BVDD) operating range",
          "symbol": "VDD",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 3,
          "typ": null,
          "max": 5.5,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Operating Ambient Temperature",
          "symbol": "TA",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "IC Junction-to-Air Thermal Resistance (NB SOIC-8)",
          "symbol": "θJA",
          "kind": "thermal",
          "unit": "°C/W",
          "min": null,
          "typ": 140,
          "max": null,
          "conditions": "",
          "source_page": 11,
          "source": "datasheet"
        }
      ]
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "si8400ab-b-is"
  ],
  "discovery_pitch": "SI8400AB-B-IS (Skyworks Solutions) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "si8400ab-b-is.kicad_sym",
    "si8400ab-b-is.kicad_mod",
    "si8400ab-b-is.glb",
    "si8400ab-b-is.step",
    "si8400ab-b-is.lbr",
    "docs/hero.png",
    "docs/si8400ab-b-is-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "si8400ab-b-is-hero.glb",
    "si8400ab-b-is-hero.overlay.json",
    "si8400ab-b-is-etched.glb"
  ],
  "visibility": {
    "public": true
  }
}