ISL32478EIBZ-T

{
  "schema_version": 1,
  "type": "component",
  "slug": "isl32478eibz-t",
  "title": "ISL32478EIBZ-T",
  "brief": "RENESAS RS-485 / RS-422 ICs, 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",
    "interface",
    "isl32478eibz-t",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "ISL32478EIBZ-T",
    "manufacturer": "RENESAS",
    "package": "SOIC-8",
    "pin_count": 8,
    "category": "Interface",
    "subcategory": "RS-485 / RS-422 ICs",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588924577724706816",
    "parts": {
      "symbol": "isl32478eibz-t.kicad_sym",
      "footprint": "isl32478eibz-t.kicad_mod",
      "model_3d": "isl32478eibz-t-hero.glb",
      "model_3d_plain": "isl32478eibz-t-etched.glb",
      "model_3d_step": "isl32478eibz-t-etched.step",
      "model_3d_step_plain": "isl32478eibz-t.step",
      "lbr": "isl32478eibz-t.lbr"
    },
    "distributor_links": {
      "lcsc": "C2672002"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T10:37:37Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "RO",
        "type": "output",
        "description": "Receiver output; RO is high if A-B is at or above the threshold stated as 10mV and low if A-B is at or below 200mV, and RO is high if A and B are floating, shorted together, or on a terminated undriven bus."
      },
      {
        "number": "2",
        "name": "RE",
        "type": "input",
        "description": "Receiver output enable; RO is enabled when RE is low and is high impedance when RE is high, with an internal pull-down."
      },
      {
        "number": "3",
        "name": "DE",
        "type": "input",
        "description": "Driver output enable; the driver outputs (A/Y and B/Z) are enabled when DE is high and are high impedance when DE is low, with an internal pull-up."
      },
      {
        "number": "4",
        "name": "DI",
        "type": "input",
        "description": "Driver input; a low on DI forces output Y low and output Z high, and a high on DI forces Y high and Z low."
      },
      {
        "number": "5",
        "name": "GND",
        "type": "power_in",
        "description": "Ground connection."
      },
      {
        "number": "6",
        "name": "A/Y",
        "type": "bidirectional",
        "description": "±60V fault and ±16.5kV HBM ESD protected RS-485/RS-422 level non-inverting receiver input and driver output; it is an input when DE = 0 and an output when DE = 1."
      },
      {
        "number": "7",
        "name": "B/Z",
        "type": "bidirectional",
        "description": "±60V fault and ±16.5kV HBM ESD protected RS-485/RS-422 level inverting receiver input and driver output; it is an input when DE = 0 and an output when DE = 1."
      },
      {
        "number": "8",
        "name": "VCC",
        "type": "power_in",
        "description": "System power supply input, 4.5V to 5.5V."
      }
    ],
    "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 description text prints the RO thresholds as 'A-B ≥ 10mV' and 'A-B ≤ 200mV' without minus si; The pin descriptions for the 8-lead device give the ESD rating as ±16.5kV HBM for A/Y and B/Z, while"
        ],
        "pages_sent": 9,
        "cost_usd": 0.0715,
        "at": "2026-10-18T10:35:56"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588924577724706816",
        "pages": 21,
        "sha256": "d78425ae58ecdc0d",
        "source_tier": "lcsc"
      },
      "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": "isl32478eibz-t.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": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "isl32478eibz-t-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": "8e00d641f94418fe5eb0e201e70e79059eb4e353b1f30968d6a785ba3680c86c",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "RENESAS",
      "Package": "SOIC-8",
      "Category": "Interface",
      "Pins": "8"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "d78425ae58ecdc0d4a9a98dd875e084203f531904e65c43ad9eca50e8e7b79b0",
      "rows": [
        {
          "name": "Driver Differential VOUT (Loaded), RL = 100Ω (RS-422)",
          "symbol": "VOD2",
          "kind": "electrical",
          "unit": "V",
          "min": 2.4,
          "typ": 3.2,
          "max": null,
          "conditions": "RL = 100Ω (RS-422), Full temp range",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Driver Differential VOUT (Loaded), RL = 54Ω (RS-485)",
          "symbol": "VOD2",
          "kind": "electrical",
          "unit": "V",
          "min": 1.5,
          "typ": 2.5,
          "max": null,
          "conditions": "RL = 54Ω (RS-485), Full temp range; printed max is VCC",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Driver Differential VOUT (Loaded), RL = 54Ω (PROFIBUS)",
          "symbol": "VOD2",
          "kind": "electrical",
          "unit": "V",
          "min": 2,
          "typ": 2.5,
          "max": null,
          "conditions": "RL = 54Ω (PROFIBUS, VCC ≥ 5V), Full temp range",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Driver Differential VOUT (Loaded), six 120Ω terminations",
          "symbol": "VOD2",
          "kind": "electrical",
          "unit": "V",
          "min": 0.8,
          "typ": 1.3,
          "max": null,
          "conditions": "RL = 21Ω, VCC ≥ 4.75V, Full temp range",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Change in Magnitude of Driver Differential VOUT",
          "symbol": "ΔVOD",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.2,
          "conditions": "RL = 54Ω or 100Ω (Figure 5A)",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Driver Differential VOUT with Common-Mode Load (-7V to 12V)",
          "symbol": "VOD3",
          "kind": "electrical",
          "unit": "V",
          "min": 1.5,
          "typ": 2.1,
          "max": null,
          "conditions": "RL = 60Ω, -7V ≤ VCM ≤ 12V; printed max is VCC",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Driver Differential VOUT with Common-Mode Load (-15V to 15V)",
          "symbol": "VOD3",
          "kind": "electrical",
          "unit": "V",
          "min": 1.7,
          "typ": 2.3,
          "max": null,
          "conditions": "RL = 60Ω, -15V ≤ VCM ≤ 15V, VCC ≥ 4.75V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Driver Common-Mode VOUT",
          "symbol": "VOC",
          "kind": "electrical",
          "unit": "V",
          "min": -1,
          "typ": null,
          "max": 3,
          "conditions": "RL = 54Ω or 100Ω (Figure 5A)",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Change in Magnitude of Driver Common-Mode VOUT",
          "symbol": "ΔVOC",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.2,
          "conditions": "RL = 54Ω or 100Ω (Figure 5A)",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Driver Short-Circuit Current",
          "symbol": "IOSD",
          "kind": "electrical",
          "unit": "mA",
          "min": -250,
          "typ": null,
          "max": 250,
          "conditions": "DE = VCC, -15V ≤ VO ≤ 15V (Note 10)",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Driver Short-Circuit Current at first foldback",
          "symbol": "IOSD1",
          "kind": "electrical",
          "unit": "mA",
          "min": -83,
          "typ": null,
          "max": 83,
          "conditions": "At first foldback, 22V ≤ VO ≤ -22V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Driver Short-Circuit Current at second foldback",
          "symbol": "IOSD2",
          "kind": "electrical",
          "unit": "mA",
          "min": -13,
          "typ": null,
          "max": 13,
          "conditions": "At second foldback, 35V ≤ VO ≤ -35V",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Logic Input High Voltage",
          "symbol": "VIH",
          "kind": "electrical",
          "unit": "V",
          "min": 2.5,
          "typ": null,
          "max": null,
          "conditions": "DE, DI, RE, Full temp range",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Logic Input Low Voltage",
          "symbol": "VIL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": null,
          "max": 0.8,
          "conditions": "DE, DI, RE, Full temp range",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Logic Input Current DI",
          "symbol": "IIN1",
          "kind": "electrical",
          "unit": "µA",
          "min": -1,
          "typ": null,
          "max": 1,
          "conditions": "DI, Full temp range",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Logic Input Current DE, RE",
          "symbol": "IIN1",
          "kind": "electrical",
          "unit": "µA",
          "min": -15,
          "typ": 6,
          "max": 15,
          "conditions": "DE, RE, Full temp range",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Input/Output Current (A/Y, B/Z), VIN = 12V",
          "symbol": "IIN2",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 110,
          "max": 250,
          "conditions": "DE = 0V, VCC = 0V or 5.5V, VIN = 12V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Input/Output Current (A/Y, B/Z), VIN = -7V",
          "symbol": "IIN2",
          "kind": "electrical",
          "unit": "µA",
          "min": -200,
          "typ": -75,
          "max": null,
          "conditions": "DE = 0V, VCC = 0V or 5.5V, VIN = -7V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Input/Output Current (A/Y, B/Z), VIN = ±15V",
          "symbol": "IIN2",
          "kind": "electrical",
          "unit": "µA",
          "min": -800,
          "typ": 240,
          "max": 800,
          "conditions": "DE = 0V, VCC = 0V or 5.5V, VIN = ±15V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Input/Output Current (A/Y, B/Z), VIN = ±60V",
          "symbol": "IIN2",
          "kind": "electrical",
          "unit": "mA",
          "min": -6,
          "typ": 0.5,
          "max": 6,
          "conditions": "DE = 0V, VCC = 0V or 5.5V, VIN = ±60V (Note 18)",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Receiver Differential Threshold Voltage",
          "symbol": "VTH",
          "kind": "electrical",
          "unit": "mV",
          "min": -200,
          "typ": -100,
          "max": -10,
          "conditions": "-15V ≤ VCM ≤ 15V, Full temp range",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Receiver Input Hysteresis",
          "symbol": "ΔVTH",
          "kind": "electrical",
          "unit": "mV",
          "min": 25,
          "typ": null,
          "max": 25,
          "conditions": "-15V ≤ VCM ≤ 15V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Receiver Output High Voltage, IO = -8mA",
          "symbol": "VOH",
          "kind": "electrical",
          "unit": "V",
          "min": 2.8,
          "typ": 4.2,
          "max": null,
          "conditions": "IO = -8mA, VID = -10mV, Full temp range",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Receiver Output Low Voltage",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
          "typ": 0.27,
          "max": 0.4,
          "conditions": "IO = 6mA, VID = -200mV, Full temp range",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Receiver Output Low Current",
          "symbol": "IOL",
          "kind": "electrical",
          "unit": "mA",
          "min": 15,
          "typ": 22,
          "max": null,
          "conditions": "VO = 1V, VID = -200mV, Full temp range",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Three-State Receiver Output Current",
          "symbol": "IOZR",
          "kind": "electrical",
          "unit": "µA",
          "min": -1,
          "typ": 0.01,
          "max": 1,
          "conditions": "0V ≤ VO ≤ VCC, Full temp range",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Receiver Short-Circuit Current",
          "symbol": "IOSR",
          "kind": "electrical",
          "unit": "mA",
          "min": 12,
          "typ": null,
          "max": 110,
          "conditions": "0V ≤ VO ≤ VCC, Full temp range",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "No-Load Supply Current",
          "symbol": "ICC",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 2.3,
          "max": 4.5,
          "conditions": "DE = VCC, RE = 0V or VCC, DI = 0V or VCC, Full temp range",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Shutdown Supply Current",
          "symbol": "ISHDN",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 10,
          "max": 50,
          "conditions": "DE = 0V, RE = VCC, DI = 0V or VCC, Full temp range",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Driver Rise or Fall Time (15Mbps)",
          "symbol": "tR, tF",
          "kind": "timing",
          "unit": "ns",
          "min": 5,
          "typ": 17,
          "max": 30,
          "conditions": "RD = 54Ω, CD = 50pF (Figure 6)",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Driver Differential Output Delay (15Mbps)",
          "symbol": "tPLH, tPHL",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 21,
          "max": 45,
          "conditions": "RD = 54Ω, CD = 50pF (Figure 6)",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Driver Differential Output Skew (15Mbps)",
          "symbol": "tSKEW",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 3,
          "max": 6,
          "conditions": "RD = 54Ω, CD = 50pF (Figure 6)",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Maximum Data Rate (Driver, 15Mbps)",
          "symbol": "fMAX",
          "kind": "timing",
          "unit": "Mbps",
          "min": 15,
          "typ": 25,
          "max": null,
          "conditions": "CD = 470pF (Figure 8)",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Driver Enable to Output High (15Mbps)",
          "symbol": "tZH",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": null,
          "max": 100,
          "conditions": "SW = GND (Figure 7), (Note 11)",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Driver Enable to Output Low (15Mbps)",
          "symbol": "tZL",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": null,
          "max": 100,
          "conditions": "SW = VCC (Figure 7), (Note 11)",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Driver Disable from Output Low",
          "symbol": "tLZ",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": null,
          "max": 120,
          "conditions": "SW = VCC (Figure 7)",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Driver Disable from Output High",
          "symbol": "tHZ",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": null,
          "max": 120,
          "conditions": "SW = GND (Figure 7)",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Time to Shutdown",
          "symbol": "tSHDN",
          "kind": "timing",
          "unit": "ns",
          "min": 60,
          "typ": 160,
          "max": 600,
          "conditions": "(Note 13)",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Driver Enable from Shutdown to Output High",
          "symbol": "tZH(SHDN)",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": null,
          "max": 2000,
          "conditions": "SW = GND (Figure 7), (Notes 13, 14)",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Driver Enable from Shutdown to Output Low",
          "symbol": "tZL(SHDN)",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": null,
          "max": 2000,
          "conditions": "SW = VCC (Figure 7), (Notes 13, 14)",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Maximum Data Rate (Receiver, 15Mbps)",
          "symbol": "fMAX",
          "kind": "timing",
          "unit": "Mbps",
          "min": 15,
          "typ": 25,
          "max": null,
          "conditions": "(Figure 9)",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Receiver Input to Output Delay (15Mbps)",
          "symbol": "tPLH, tPHL",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 35,
          "max": 70,
          "conditions": "(Figure 9)",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Receiver Skew (15Mbps)",
          "symbol": "tSKD",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 4,
          "max": 10,
          "conditions": "(Figure 9)",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Receiver Enable to Output Low",
          "symbol": "tZL",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": null,
          "max": 50,
          "conditions": "RL = 1kΩ, CL = 15pF, SW = VCC (Figure 10), (Note 12)",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Receiver Enable to Output High",
          "symbol": "tZH",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": null,
          "max": 50,
          "conditions": "RL = 1kΩ, CL = 15pF, SW = GND (Figure 10), (Note 12)",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Receiver Disable from Output Low",
          "symbol": "tLZ",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": null,
          "max": 50,
          "conditions": "RL = 1kΩ, CL = 15pF, SW = VCC (Figure 10)",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Receiver Disable from Output High",
          "symbol": "tHZ",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": null,
          "max": 50,
          "conditions": "RL = 1kΩ, CL = 15pF, SW = GND (Figure 10)",
          "source_page": 8,
          "source": "datasheet"
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        {
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