CA-IS3740LW

{
  "schema_version": 1,
  "type": "component",
  "slug": "ca-is3740lw",
  "title": "CA-IS3740LW",
  "brief": "Chipanalog 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": [
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    "communication interface chip-uart-485-232",
    "ca-is3740lw",
    "factory-2.0.0",
    "extractor-text"
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  "component": {
    "mpn": "CA-IS3740LW",
    "manufacturer": "Chipanalog",
    "package": "SOIC-16",
    "pin_count": 16,
    "category": "Communication Interface Chip/UART/485/232",
    "subcategory": "Digital Isolators",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/a47611d83f8b8be5a0525e8630cfd482.pdf",
    "parts": {
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      "lbr": "ca-is3740lw.lbr"
    },
    "distributor_links": {
      "lcsc": "C2836462"
    },
    "distributor_check": {
      "checked_at": "2026-10-28T21:47:35Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "VDDA",
        "type": "power_in",
        "description": "A-side supply voltage, with a recommended operating range of 2.375 V to 5.5 V."
      },
      {
        "number": "2",
        "name": "GNDA",
        "type": "power_in",
        "description": "A-side ground reference point."
      },
      {
        "number": "3",
        "name": "VI1",
        "type": "input",
        "description": "A-side logic input for channel 1, a Schmitt-trigger input with VIH of at least 2.0 V and VIL of at most 0.8 V."
      },
      {
        "number": "4",
        "name": "VI2",
        "type": "input",
        "description": "A-side logic input for channel 2, a Schmitt-trigger input with VIH of at least 2.0 V and VIL of at most 0.8 V."
      },
      {
        "number": "5",
        "name": "VI3",
        "type": "input",
        "description": "A-side logic input for channel 3 on the CA-IS3740 (the datasheet label is VI3/VO3, but VI3 is an input on this device), with VIH of at least 2.0 V and VIL of at most 0.8 V."
      },
      {
        "number": "6",
        "name": "VI4",
        "type": "input",
        "description": "A-side logic input for channel 4 on the CA-IS3740 (the datasheet label is VI4/VO4, but VI4 is an input on this device), with VIH of at least 2.0 V and VIL of at most 0.8 V."
      },
      {
        "number": "7",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection on the CA-IS3740; the pin may be left floating or tied to VDD or GND."
      },
      {
        "number": "8",
        "name": "GNDA",
        "type": "power_in",
        "description": "A-side ground reference point."
      },
      {
        "number": "9",
        "name": "GNDB",
        "type": "power_in",
        "description": "B-side ground reference point."
      },
      {
        "number": "10",
        "name": "ENB",
        "type": "input",
        "description": "B-side output enable, internally pulled up to local VDD; a logic low puts outputs VO1 to VO4 into high impedance, and it should be tied to a defined logic level in noisy environments."
      },
      {
        "number": "11",
        "name": "VO4",
        "type": "output",
        "description": "B-side logic output for channel 4 on the CA-IS3740, with a typical output impedance of 50 Ω."
      },
      {
        "number": "12",
        "name": "VO3",
        "type": "output",
        "description": "B-side logic output for channel 3 on the CA-IS3740, with a typical output impedance of 50 Ω."
      },
      {
        "number": "13",
        "name": "VO2",
        "type": "output",
        "description": "B-side logic output for channel 2, with a typical output impedance of 50 Ω."
      },
      {
        "number": "14",
        "name": "VO1",
        "type": "output",
        "description": "B-side logic output for channel 1, with a typical output impedance of 50 Ω."
      },
      {
        "number": "15",
        "name": "GNDB",
        "type": "power_in",
        "description": "B-side ground reference point."
      },
      {
        "number": "16",
        "name": "VDDB",
        "type": "power_in",
        "description": "B-side supply voltage, with a recommended operating range of 2.375 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 datasheet labels these pins as dual-function (VI3/VO3 and VI4/VO4) across the CA-IS374x family. ; The pinout figure and table cover both the SOIC16-NB and SOIC16-WB packages under one 16-pin top vie"
        ],
        "pages_sent": 25,
        "cost_usd": 0.1241,
        "at": "2026-10-28T21:47:19"
      },
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        "pages": 25,
        "sha256": "fd7bb5373a55db4c",
        "source_tier": "lcsc"
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      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 16,
        "described": 16,
        "cites_pages": true,
        "refuses_to_fabricate": true
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        "zmin_mm": 0,
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "Chipanalog",
      "Package": "SOIC-16",
      "Category": "Communication Interface Chip/UART/485/232",
      "Pins": "16"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
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          "name": "Supply voltage VDDA, VDDB",
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        {
          "name": "Input voltage Ax, Bx, ENx",
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        {
          "name": "Output current IO",
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          "min": -20,
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        {
          "name": "Storage temperature range TSTG",
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          "unit": "°C",
          "min": -65,
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          "name": "Supply voltage VDDA, VDDB",
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          "min": 2.375,
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        {
          "name": "UVLO threshold on rising VDD",
          "symbol": "VDD(UVLO+)",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 1.95,
          "typ": 2.24,
          "max": 2.37,
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        {
          "name": "UVLO threshold on falling VDD",
          "symbol": "VDD(UVLO-)",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 1.88,
          "typ": 2.1,
          "max": 2.325,
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        {
          "name": "UVLO hysteresis",
          "symbol": "VHYS(UVLO)",
          "kind": "recommended_operating",
          "unit": "mV",
          "min": 70,
          "typ": 140,
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        {
          "name": "High-level output current IOH",
          "symbol": "IOH",
          "kind": "recommended_operating",
          "unit": "mA",
          "min": -4,
          "typ": null,
          "max": null,
          "conditions": "VDDO = 5V",
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        {
          "name": "Low-level output current IOL",
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          "kind": "recommended_operating",
          "unit": "mA",
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          "name": "High-level output current IOH",
          "symbol": "IOH",
          "kind": "recommended_operating",
          "unit": "mA",
          "min": -2,
          "typ": null,
          "max": null,
          "conditions": "VDDO = 3.3V",
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        {
          "name": "Low-level output current IOL",
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          "kind": "recommended_operating",
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          "conditions": "VDDO = 3.3V",
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        {
          "name": "High-level output current IOH",
          "symbol": "IOH",
          "kind": "recommended_operating",
          "unit": "mA",
          "min": -1,
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          "max": null,
          "conditions": "VDDO = 2.5V",
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          "name": "Low-level output current IOL",
          "symbol": "IOL",
          "kind": "recommended_operating",
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          "typ": null,
          "max": 1,
          "conditions": "VDDO = 2.5V",
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        {
          "name": "Input threshold logic high",
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        {
          "name": "Input threshold logic low",
          "symbol": "VIL",
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          "typ": null,
          "max": 0.8,
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        },
        {
          "name": "Signaling data rate",
          "symbol": "DR",
          "kind": "recommended_operating",
          "unit": "Mbps",
          "min": 0,
          "typ": null,
          "max": 150,
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        },
        {
          "name": "Ambient temperature TA",
          "symbol": "TA",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": 27,
          "max": 125,
          "conditions": "",
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        {
          "name": "Output logic-low voltage VOL",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 0.2,
          "max": 0.4,
          "conditions": "VDDA=VDDB=5V±10%, TA=-40 to 125°C; IOL = 4mA",
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        {
          "name": "Input threshold logic high VIT+(IN)",
          "symbol": "VIT+(IN)",
          "kind": "electrical",
          "unit": "V",
          "min": 2,
          "typ": null,
          "max": null,
          "conditions": "VDDA=VDDB=5V±10%, TA=-40 to 125°C",
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        {
          "name": "Input threshold logic low VIT-(IN)",
          "symbol": "VIT-(IN)",
          "kind": "electrical",
          "unit": "V",
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          "max": 0.8,
          "conditions": "VDDA=VDDB=5V±10%, TA=-40 to 125°C",
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        },
        {
          "name": "Input high-level leakage current IIH",
          "symbol": "IIH",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": null,
          "max": 20,
          "conditions": "VDDA=VDDB=5V±10%, TA=-40 to 125°C; VIH = VDDA at Ax, Bx or ENx",
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        },
        {
          "name": "Input low-level leakage current IIL",
          "symbol": "IIL",
          "kind": "electrical",
          "unit": "µA",
          "min": -20,
          "typ": null,
          "max": null,
          "conditions": "VDDA=VDDB=5V±10%, TA=-40 to 125°C; VIL = 0 V at Ax, Bx or ENx",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Common-mode transient immunity CMTI",
          "symbol": "CMTI",
          "kind": "electrical",
          "unit": "kV/µs",
          "min": 100,
          "typ": 150,
          "max": null,
          "conditions": "VDDA=VDDB=5V±10%, TA=-40 to 125°C; VI = VDDI1 or 0 V, VCM = 1200 V; Fig 8-4",
          "source_page": 9,
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        },
        {
          "name": "Output impedance tolerance (typ 50 Ω)",
          "symbol": "ZO",
          "kind": "tolerance",
          "unit": "%",
          "min": -40,
          "typ": null,
          "max": 40,
          "conditions": "Normal isolator channel output impedance, footnote 2",
          "source_page": 9,
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        {
          "name": "Supply current IDDA, enable-off, CA-IS3740L",
          "symbol": "IDDA",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 1.3,
          "max": 2.1,
          "conditions": "VDDA=VDDB=5V±10%; ENB = 0 V; VIN = 0V (CA-IS3740L)",
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        },
        {
          "name": "Supply current IDDB, enable-off, CA-IS3740L",
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          "conditions": "VDDA=VDDB=5V±10%; ENB = 0 V; VIN = 0V (CA-IS3740L)",
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        {
          "name": "Supply current IDDA, DC signal, CA-IS3740L",
          "symbol": "IDDA",
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          "unit": "mA",
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          "conditions": "VDDA=VDDB=5V±10%; ENB = VDDB; VIN = 0V (CA-IS3740L)",
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        {
          "name": "Supply current IDDB, DC signal, CA-IS3740L",
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        },
        {
          "name": "Supply current IDDA, AC 1 Mbps",
          "symbol": "IDDA",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 3.9,
          "max": 5.8,
          "conditions": "VDDA=VDDB=5V±10%; ENB = VDDB; all inputs 50% duty 5V square wave; CL = 15 pF; 1Mbps (500kHz)",
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        {
          "name": "Supply current IDDB, AC 1 Mbps",
          "symbol": "IDDB",
          "kind": "electrical",
          "unit": "mA",
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          "source": "datasheet"
        },
        {
          "name": "Supply current IDDA, AC 10 Mbps",
          "symbol": "IDDA",
          "kind": "electrical",
          "unit": "mA",
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          "conditions": "VDDA=VDDB=5V±10%; ENB = VDDB; all inputs 50% duty 5V square wave; CL = 15 pF; 10Mbps (5MHz)",
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        },
        {
          "name": "Supply current IDDB, AC 10 Mbps",
          "symbol": "IDDB",
          "kind": "electrical",
          "unit": "mA",
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          "conditions": "VDDA=VDDB=5V±10%; ENB = VDDB; all inputs 50% duty 5V square wave; CL = 15 pF; 10Mbps (5MHz)",
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          "source": "datasheet"
        },
        {
          "name": "Supply current IDDA, AC 100 Mbps",
          "symbol": "IDDA",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 4.7,
          "max": 6.8,
          "conditions": "VDDA=VDDB=5V±10%; ENB = VDDB; all inputs 50% duty 5V square wave; CL = 15 pF; 100Mbps (50MHz)",
          "source_page": 10,
          "source": "datasheet"
        },
        {
          "name": "Supply current IDDB, AC 100 Mbps",
          "symbol": "IDDB",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 41,
          "max": 54.7,
          "conditions": "VDDA=VDDB=5V±10%; ENB = VDDB; all inputs 50% duty 5V square wave; CL = 15 pF; 100Mbps (50MHz)",
          "source_page": 10,
          "source": "datasheet"
        },
        {
          "name": "Propagation pulse width minimum PWmin",
          "symbol": "PWmin",
          "kind": "timing",
          "unit": "ns",
          "min": 5,
          "typ": null,
          "max": null,
          "conditions": "VDDA=VDDB=5V±10%, TA=-40 to 125°C",
          "source_page": 13,
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        },
        {
          "name": "Propagation delay tPLH, tPHL",
          "symbol": "tPLH, tPHL",
          "kind": "timing",
          "unit": "ns",
          "min": 5,
          "typ": 12,
          "max": 16,
          "conditions": "VDDA=VDDB=5V±10%; Fig 8-1",
          "source_page": 13,
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        },
        {
          "name": "Pulse width distortion PWD",
          "symbol": "PWD",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 0.2,
          "max": 4.5,
          "conditions": "|tPLH - tPHL|; VDDA=VDDB=5V±10%",
          "source_page": 13,
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        },
        {
          "name": "Channel-to-channel output skew tsk(o)",
          "symbol": "tsk(o)",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 0.4,
          "max": 2.5,
          "conditions": "Same-direction channels; VDDA=VDDB=5V±10%; footnote 1",
          "source_page": 13,
          "source": "datasheet"
        },
        {
          "name": "Part-to-part output skew tsk(pp)",
          "symbol": "tsk(pp)",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 2,
          "max": 4.5,
          "conditions": "VDDA=VDDB=5V±10%; footnote 2",
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        },
        {
          "name": "Output rise time tr",
          "symbol": "tr",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 2.5,
          "max": 4,
          "conditions": "VDDA=VDDB=5V±10%; Fig 8-1",
          "source_page": 13,
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