CA-IF4905S

{
  "schema_version": 1,
  "type": "component",
  "slug": "ca-if4905s",
  "title": "CA-IF4905S",
  "brief": "Chipanalog 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",
    "ca-if4905s",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "CA-IF4905S",
    "manufacturer": "Chipanalog",
    "package": "SOIC-8",
    "pin_count": 8,
    "category": "Interface",
    "subcategory": "RS-485 / RS-422 ICs",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8604440374123241472",
    "parts": {
      "symbol": "ca-if4905s.kicad_sym",
      "footprint": "ca-if4905s.kicad_mod",
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      "model_3d_plain": "ca-if4905s-etched.glb",
      "model_3d_step": "ca-if4905s-etched.step",
      "model_3d_step_plain": "ca-if4905s.step",
      "lbr": "ca-if4905s.lbr"
    },
    "distributor_links": {
      "lcsc": "C41383502"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T02:23:15Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "RO",
        "type": "output",
        "description": "Receiver data output: driven high when VID ≥ -20mV, low when VID ≤ -200mV, and held at fail-safe high on open, short, or idle bus; high-impedance when REB is high or open."
      },
      {
        "number": "2",
        "name": "REB",
        "type": "input",
        "description": "Receiver enable, active low with internal pull-up to VCC; REB high or open forces RO to high-impedance."
      },
      {
        "number": "3",
        "name": "DE",
        "type": "input",
        "description": "Driver enable, active high with internal pull-down to GND; DE low or open disables the driver and puts A and B in high-impedance."
      },
      {
        "number": "4",
        "name": "DI",
        "type": "input",
        "description": "Driver data input with internal pull-up to VCC; when left open with the driver enabled, output A goes high and B goes low."
      },
      {
        "number": "5",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference for the device; all voltages are referenced to GND."
      },
      {
        "number": "6",
        "name": "A",
        "type": "bidirectional",
        "description": "Non-inverting receiver input and driver output on the bus; bus pins withstand ±65V fault voltage and operate over a ±40V common-mode range (4.5V to 5.5V VCC), with ±30kV HBM ESD protection."
      },
      {
        "number": "7",
        "name": "B",
        "type": "bidirectional",
        "description": "Inverting receiver input and driver output on the bus; bus pins withstand ±65V fault voltage and operate over a ±40V common-mode range (4.5V to 5.5V VCC), with ±30kV HBM ESD protection."
      },
      {
        "number": "8",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply input, 3.0V to 5.5V; place at least a 0.1µF bypass capacitor between VCC and GND as close to the pin as possible."
      }
    ],
    "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 is in Chinese. Pin names, numbers, and functions come from Table 6-1 (page 4) and were; Pin 6 and pin 7 are typed bidirectional (bus I/O), which is the standard KiCad class for RS-485 A/B "
        ],
        "pages_sent": 19,
        "cost_usd": 0.0707,
        "at": "2026-10-18T02:21:05"
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      "datasheet": {
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        "pages": 19,
        "sha256": "3042ede74dfad5c5",
        "source_tier": "lcsc"
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      "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"
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        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
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        "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)"
      },
      {
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "Chipanalog",
      "Package": "SOIC-8",
      "Category": "Interface",
      "Pins": "8"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "3042ede74dfad5c5e0d49905c300e46ad6aace3c3fb93dee90a8f51211666cf3",
      "rows": [
        {
          "name": "VCC supply voltage (absolute maximum)",
          "symbol": "VCC",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.5,
          "typ": null,
          "max": 7,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Bus voltage A, B (absolute maximum)",
          "symbol": "VIO",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -65,
          "typ": null,
          "max": 65,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Junction temperature (absolute maximum)",
          "symbol": "TJ",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": null,
          "typ": null,
          "max": 150,
          "conditions": "",
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        },
        {
          "name": "Storage temperature (absolute maximum)",
          "symbol": "TSTG",
          "kind": "absolute_maximum",
          "unit": "°C",
          "min": -65,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "VCC supply voltage vs GND (recommended)",
          "symbol": "VCC",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 3,
          "typ": 5,
          "max": 5.5,
          "conditions": "Referenced to GND",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Bus input voltage (recommended)",
          "symbol": "VIN",
          "kind": "recommended_operating",
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          "min": -40,
          "typ": null,
          "max": 40,
          "conditions": "",
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        {
          "name": "DI, DE, REB high-level input threshold (recommended)",
          "symbol": "VIH",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 2,
          "typ": null,
          "max": null,
          "conditions": "DI, DE, REB pins",
          "source_page": 5,
          "source": "datasheet"
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        {
          "name": "DI, DE, REB low-level input threshold (recommended)",
          "symbol": "VIL",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 0,
          "typ": null,
          "max": 0.8,
          "conditions": "DI, DE, REB pins",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Differential load resistance",
          "symbol": "RL",
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          "unit": "Ω",
          "min": 54,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Data rate",
          "symbol": "1/tUI",
          "kind": "recommended_operating",
          "unit": "kbps",
          "min": null,
          "typ": null,
          "max": 500,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Operating ambient temperature",
          "symbol": "TA",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Operating junction temperature",
          "symbol": "TJ",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 150,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "|VOD| differential output voltage",
          "symbol": "|VOD|",
          "kind": "electrical",
          "unit": "V",
          "min": 1.2,
          "typ": null,
          "max": 2.8,
          "conditions": "RL = 60Ω, –40V ≤ Vtest ≤ 40V, see Fig 8-1",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "|VOD| differential output voltage",
          "symbol": "|VOD|",
          "kind": "electrical",
          "unit": "V",
          "min": 2,
          "typ": null,
          "max": 2.8,
          "conditions": "RL = 60Ω, –40V ≤ Vtest ≤ 40V, 4.5V ≤ VCC ≤ 5.5V, see Fig 8-1",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "|VOD| differential output voltage",
          "symbol": "|VOD|",
          "kind": "electrical",
          "unit": "V",
          "min": 1.7,
          "typ": null,
          "max": 3.5,
          "conditions": "RL = 100Ω, CL = 50pF, see Fig 8-2",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Change in differential output voltage",
          "symbol": "Δ|VOD|",
          "kind": "electrical",
          "unit": "mV",
          "min": -200,
          "typ": null,
          "max": 200,
          "conditions": "RL = 54Ω or 100Ω, CL = 50pF, see Fig 8-2",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Common-mode output voltage",
          "symbol": "VOC",
          "kind": "electrical",
          "unit": "V",
          "min": 1,
          "typ": null,
          "max": 3.2,
          "conditions": "RL = 54Ω or 100Ω, CL = 50pF, see Fig 8-2",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Steady-state common-mode output voltage change",
          "symbol": "ΔVOC(SS)",
          "kind": "electrical",
          "unit": "mV",
          "min": -100,
          "typ": null,
          "max": 100,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Driver short-circuit output current",
          "symbol": "IOSD",
          "kind": "electrical",
          "unit": "mA",
          "min": -200,
          "typ": null,
          "max": 200,
          "conditions": "DE = VCC, –65V ≤ VO ≤ 65V, or A and B shorted",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Bus input current",
          "symbol": "II",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": null,
          "max": 125,
          "conditions": "DE = 0V, VCC = 0V or 5.5V, VI = 12V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Bus input current",
          "symbol": "II",
          "kind": "electrical",
          "unit": "μA",
          "min": -100,
          "typ": null,
          "max": null,
          "conditions": "DE = 0V, VCC = 0V or 5.5V, VI = –7V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Bus input current",
          "symbol": "II",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": null,
          "max": 410,
          "conditions": "DE = 0V, VCC = 0V or 5.5V, VI = 40V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Bus input current",
          "symbol": "II",
          "kind": "electrical",
          "unit": "μA",
          "min": -400,
          "typ": null,
          "max": null,
          "conditions": "DE = 0V, VCC = 0V or 5.5V, VI = –40V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Bus input impedance",
          "symbol": "RI",
          "kind": "electrical",
          "unit": "kΩ",
          "min": 96,
          "typ": null,
          "max": null,
          "conditions": "Within common-mode voltage range",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Common-mode voltage range",
          "symbol": "VCM",
          "kind": "electrical",
          "unit": "V",
          "min": -25,
          "typ": null,
          "max": 25,
          "conditions": "3V ≤ VCC ≤ 3.6V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Common-mode voltage range",
          "symbol": "VCM",
          "kind": "electrical",
          "unit": "V",
          "min": -40,
          "typ": null,
          "max": 40,
          "conditions": "4.5V ≤ VCC ≤ 5.5V",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Positive input threshold voltage",
          "symbol": "VTH+",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": null,
          "max": -20,
          "conditions": "Within common-mode voltage range",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Negative input threshold voltage",
          "symbol": "VTH-",
          "kind": "electrical",
          "unit": "mV",
          "min": -200,
          "typ": null,
          "max": null,
          "conditions": "Within common-mode voltage range",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Input hysteresis voltage",
          "symbol": "VHYS2",
          "kind": "electrical",
          "unit": "mV",
          "min": 30,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Output low-level voltage",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
          "min": 0.2,
          "typ": null,
          "max": 0.4,
          "conditions": "IOL = 3mA",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "High-impedance output current",
          "symbol": "IOZR",
          "kind": "electrical",
          "unit": "μA",
          "min": -1,
          "typ": null,
          "max": 1,
          "conditions": "REB = VCC, VO = 0V or VCC",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Receiver short-circuit output current",
          "symbol": "IOSR",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": null,
          "max": 95,
          "conditions": "REB = DE = 0V, see Fig 8-3",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Input current (DI, DE, REB)",
          "symbol": "IIN",
          "kind": "electrical",
          "unit": "μA",
          "min": -10,
          "typ": null,
          "max": 10,
          "conditions": "0V ≤ VIN ≤ VCC; for DE after hot-plug protection time",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "High-level input threshold (DI, DE, REB)",
          "symbol": "VIH",
          "kind": "electrical",
          "unit": "V",
          "min": 2,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Low-level input threshold (DI, DE, REB)",
          "symbol": "VIL",
          "kind": "electrical",
          "unit": "V",
          "min": 0,
          "typ": null,
          "max": 0.8,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Static supply current, driver and receiver enabled",
          "symbol": "ICC",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 2.2,
          "max": 3.5,
          "conditions": "REB = 0V, DE = VCC, no load",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Static supply current, driver enabled, receiver disabled",
          "symbol": "ICC",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 2.2,
          "max": 3.5,
          "conditions": "REB = VCC, DE = VCC, no load",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Static supply current, driver disabled, receiver enabled",
          "symbol": "ICC",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 1.4,
          "max": 2.5,
          "conditions": "REB = 0V, DE = 0V, no load",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Static supply current, driver and receiver disabled",
          "symbol": "ICC",
          "kind": "electrical",
          "unit": "μA",
          "min": null,
          "typ": 10,
          "max": 30,
          "conditions": "REB = VCC, DE = 0V, DI = VCC, no load",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Thermal shutdown temperature",
          "symbol": "TSD",
          "kind": "electrical",
          "unit": "°C",
          "min": null,
          "typ": 185,
          "max": null,
          "conditions": "Temperature rising",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Thermal shutdown hysteresis",
          "symbol": "",
          "kind": "electrical",
          "unit": "°C",
          "min": null,
          "typ": 20,
          "max": null,
          "conditions": "",
          "source_page": 6,
          "source": "datasheet"
        },
        {
          "name": "Differential output rise/fall time",
          "symbol": "tDR, tDF",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 110,
          "max": 500,
          "conditions": "RL = 54Ω, CL = 50pF, see Fig 8-4",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Driver propagation delay",
          "symbol": "tDPHL, tDPLH",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 170,
          "max": 600,
          "conditions": "",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Driver pulse skew",
          "symbol": "tDSKEW",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 5,
          "max": 50,
          "conditions": "|tDPHL – tDPLH|",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Driver disable time",
          "symbol": "tDHZ, tDLZ",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 70,
          "max": 250,
          "conditions": "See Fig 8-5 and 8-6",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Driver enable time",
          "symbol": "tDZH, tDZL",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 180,
          "max": 900,
          "conditions": "REB = 0V, see Fig 8-5 and 8-6",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Driver enable time from shutdown",
          "symbol": "tDZH(SHDN), tDZL(SHDN)",
          "kind": "timing",
          "unit": "μs",
          "min": null,
          "typ": 3.3,
          "max": 8,
          "conditions": "REB = VCC, see Fig 8-5 and 8-6",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Receiver propagation delay",
          "symbol": "tRPHL, tRPLH",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 145,
          "max": 300,
          "conditions": "CL = 15pF, see Fig 8-7",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Receiver pulse skew",
          "symbol": "tRSKEW",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 3,
          "max": 30,
          "conditions": "|tRPHL – tRPLH|",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Receiver disable time",
          "symbol": "tRHZ, tRLZ",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": 10,
          "max": 80,
          "conditions": "See Fig 8-8",
          "source_page": 7,
          "source": "datasheet"
        },
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