MAX3237CAI+

{
  "schema_version": 1,
  "type": "component",
  "slug": "max3237cai",
  "title": "MAX3237CAI+",
  "brief": "Maxim Integrated Pre-ordered Chips, SSOP-28-208mil. 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 ics",
    "max3237cai+",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "MAX3237CAI+",
    "manufacturer": "Maxim Integrated",
    "package": "SSOP-28-208mil",
    "pin_count": 28,
    "category": "Interface ICs",
    "subcategory": "Pre-ordered Chips",
    "datasheet": "https://www.analog.com/media/en/technical-documentation/data-sheets/max3222-max3241.pdf",
    "parts": {
      "symbol": "max3237cai.kicad_sym",
      "footprint": "max3237cai.kicad_mod",
      "model_3d": "max3237cai-hero.glb",
      "model_3d_plain": "max3237cai-etched.glb",
      "model_3d_step": "max3237cai-etched.step",
      "model_3d_step_plain": "max3237cai.step",
      "lbr": "max3237cai.lbr"
    },
    "distributor_links": {
      "lcsc": "C1544158",
      "digikey": "MAX3237CAI+-ND",
      "mouser": "700-MAX3237CAI"
    },
    "distributor_check": {
      "checked_at": "2026-10-30T18:41:27Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "MAX3237CAI+-ND",
        "status": "found"
      },
      "mouser": {
        "pn": "700-MAX3237CAI",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "C2+",
        "type": "passive",
        "description": "Positive terminal of the inverting charge-pump capacitor C2, which the datasheet specifies as 0.22µF to 1.0µF for the 3.0V to 5.5V range."
      },
      {
        "number": "2",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference for the device."
      },
      {
        "number": "3",
        "name": "C2-",
        "type": "passive",
        "description": "Negative terminal of the inverting charge-pump capacitor C2."
      },
      {
        "number": "4",
        "name": "V-",
        "type": "power_out",
        "description": "Generated -5.5V charge-pump output that is pulled to ground when the device is shut down."
      },
      {
        "number": "5",
        "name": "T1OUT",
        "type": "output",
        "description": "RS-232 transmitter 1 output, guaranteed at least ±5.0V into a 3kΩ load to ground and high-impedance in shutdown."
      },
      {
        "number": "6",
        "name": "T2OUT",
        "type": "output",
        "description": "RS-232 transmitter 2 output, guaranteed at least ±5.0V into a 3kΩ load to ground and high-impedance in shutdown."
      },
      {
        "number": "7",
        "name": "T3OUT",
        "type": "output",
        "description": "RS-232 transmitter 3 output, guaranteed at least ±5.0V into a 3kΩ load to ground and high-impedance in shutdown."
      },
      {
        "number": "8",
        "name": "R1IN",
        "type": "input",
        "description": "RS-232 receiver 1 input, rated for a voltage range of ±25V."
      },
      {
        "number": "9",
        "name": "R2IN",
        "type": "input",
        "description": "RS-232 receiver 2 input, rated for a voltage range of ±25V."
      },
      {
        "number": "10",
        "name": "T4OUT",
        "type": "output",
        "description": "RS-232 transmitter 4 output, guaranteed at least ±5.0V into a 3kΩ load to ground and high-impedance in shutdown."
      },
      {
        "number": "11",
        "name": "R3IN",
        "type": "input",
        "description": "RS-232 receiver 3 input, rated for a voltage range of ±25V."
      },
      {
        "number": "12",
        "name": "T5OUT",
        "type": "output",
        "description": "RS-232 transmitter 5 output, guaranteed at least ±5.0V into a 3kΩ load to ground and high-impedance in shutdown."
      },
      {
        "number": "13",
        "name": "EN",
        "type": "input",
        "description": "Receiver enable, active low; when high the inverting R_OUT outputs are put into high-impedance, and it has no effect on T_OUT."
      },
      {
        "number": "14",
        "name": "SHDN",
        "type": "input",
        "description": "Shutdown control, active low; in shutdown the charge pumps are off, transmitter outputs are high-impedance and supply current is 1.0µA typical (10µA max) with SHDN = GND."
      },
      {
        "number": "15",
        "name": "MBAUD",
        "type": "input",
        "description": "MegaBaud control input; connect to GND for normal 250kbps operation or to VCC for 1Mbps transmission rates."
      },
      {
        "number": "16",
        "name": "R1OUTB",
        "type": "output",
        "description": "Noninverting complementary receiver 1 output that is always active, regardless of the state of EN or SHDN."
      },
      {
        "number": "17",
        "name": "T5IN",
        "type": "input",
        "description": "TTL/CMOS transmitter 5 input with logic thresholds of 0.8V low and 2.0V to 2.4V high, and no internal pullup, so unused inputs must be tied to GND or VCC."
      },
      {
        "number": "18",
        "name": "R3OUT",
        "type": "output",
        "description": "Inverting TTL/CMOS receiver 3 output that goes high-impedance when EN is high."
      },
      {
        "number": "19",
        "name": "T4IN",
        "type": "input",
        "description": "TTL/CMOS transmitter 4 input with logic thresholds of 0.8V low and 2.0V to 2.4V high, and no internal pullup, so unused inputs must be tied to GND or VCC."
      },
      {
        "number": "20",
        "name": "R2OUT",
        "type": "output",
        "description": "Inverting TTL/CMOS receiver 2 output that goes high-impedance when EN is high."
      },
      {
        "number": "21",
        "name": "R1OUT",
        "type": "output",
        "description": "Inverting TTL/CMOS receiver 1 output that goes high-impedance when EN is high."
      },
      {
        "number": "22",
        "name": "T3IN",
        "type": "input",
        "description": "TTL/CMOS transmitter 3 input with logic thresholds of 0.8V low and 2.0V to 2.4V high, and no internal pullup, so unused inputs must be tied to GND or VCC."
      },
      {
        "number": "23",
        "name": "T2IN",
        "type": "input",
        "description": "TTL/CMOS transmitter 2 input with logic thresholds of 0.8V low and 2.0V to 2.4V high, and no internal pullup, so unused inputs must be tied to GND or VCC."
      },
      {
        "number": "24",
        "name": "T1IN",
        "type": "input",
        "description": "TTL/CMOS transmitter 1 input with logic thresholds of 0.8V low and 2.0V to 2.4V high, and no internal pullup, so unused inputs must be tied to GND or VCC."
      },
      {
        "number": "25",
        "name": "C1-",
        "type": "passive",
        "description": "Negative terminal of the voltage-doubler charge-pump capacitor C1."
      },
      {
        "number": "26",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply voltage of +3.0V to +5.5V (absolute maximum +6V)."
      },
      {
        "number": "27",
        "name": "V+",
        "type": "power_out",
        "description": "Generated +5.5V charge-pump output that is pulled down to VCC when the device is shut down."
      },
      {
        "number": "28",
        "name": "C1+",
        "type": "passive",
        "description": "Positive terminal of the voltage-doubler charge-pump capacitor C1."
      }
    ],
    "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: Ordering table (page 15) lists MAX3237CAI+ with a '16' pin count but package code A28+2 (SSOP, 21-00; The datasheet text does not state the SSOP body width (208mil). Package identity is taken from the p; Pin types for the charge-pump capacitor terminals (C1+, C1-, C2+, C2-) were classed as passive becau",
          "11/28 pins cited to the wrong page (name found elsewhere): ['6:T2OUT@p6', '7:T3OUT@p6', '9:R2IN@p6', '10:T4OUT@p6']"
        ],
        "pages_sent": 17,
        "cost_usd": 0.1125,
        "at": "2026-10-30T18:41:13"
      },
      "datasheet": {
        "url": "https://www.analog.com/media/en/technical-documentation/data-sheets/max3222-max3241.pdf",
        "pages": 17,
        "sha256": "6179886183cdd63b",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 28,
        "described": 28,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
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      "footprint": "viewers/footprint.html"
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        "zmin_mm": 0,
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        "checked": "2026-10-30",
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "Maxim Integrated",
      "Package": "SSOP-28-208mil",
      "Category": "Interface ICs",
      "Pins": "28"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "6179886183cdd63b99ace03353f7245e876e6cc6aa2415a2b19c9deda7a72ce1",
      "rows": [
        {
          "name": "VCC Power-Supply Current",
          "symbol": "",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
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          "max": 2,
          "conditions": "No load, VCC = 3.3V or 5.0V, TA = +25°C",
          "source_page": 2,
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        {
          "name": "Shutdown Supply Current",
          "symbol": "",
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          "unit": "µA",
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          "conditions": "SHDN = GND, TA = +25°C",
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          "name": "Input Logic Threshold Low",
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          "name": "Output Leakage Current",
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          "name": "Output Voltage Low",
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        {
          "name": "Receiver Input Voltage Range",
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          "min": -25,
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        {
          "name": "Input Threshold Low",
          "symbol": "",
          "kind": "electrical",
          "unit": "V",
          "min": 0.6,
          "typ": 1.2,
          "max": null,
          "conditions": "TA = +25°C, VCC = 3.3V",
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        {
          "name": "Input Threshold Low",
          "symbol": "",
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          "unit": "V",
          "min": 0.8,
          "typ": 1.5,
          "max": null,
          "conditions": "TA = +25°C, VCC = 5.0V",
          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Input Threshold High",
          "symbol": "",
          "kind": "electrical",
          "unit": "V",
          "min": 1.5,
          "typ": 2.4,
          "max": null,
          "conditions": "TA = +25°C, VCC = 3.3V",
          "source_page": 2,
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        {
          "name": "Input Threshold High",
          "symbol": "",
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          "min": 1.8,
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          "conditions": "TA = +25°C, VCC = 5.0V",
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        {
          "name": "Input Resistance",
          "symbol": "",
          "kind": "electrical",
          "unit": "kΩ",
          "min": 3,
          "typ": 5,
          "max": 7,
          "conditions": "TA = +25°C",
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        {
          "name": "Output Voltage Swing",
          "symbol": "",
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          "min": 5,
          "typ": 5.4,
          "max": null,
          "conditions": "All transmitter outputs loaded with 3kΩ to ground",
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        {
          "name": "Output Resistance",
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          "kind": "electrical",
          "unit": "Ω",
          "min": 300,
          "typ": null,
          "max": null,
          "conditions": "VCC = V+ = V- = 0V, VOUT = ±2V",
          "source_page": 3,
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        },
        {
          "name": "Output Short-Circuit Current",
          "symbol": "",
          "kind": "electrical",
          "unit": "mA",
          "min": 35,
          "typ": 60,
          "max": null,
          "conditions": "",
          "source_page": 3,
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        },
        {
          "name": "Output Leakage Current (transmitters)",
          "symbol": "",
          "kind": "electrical",
          "unit": "µA",
          "min": -25,
          "typ": null,
          "max": 25,
          "conditions": "VOUT = ±12V, VCC = 0V or 3V to 5.5V, transmitters disabled",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Maximum Data Rate",
          "symbol": "",
          "kind": "timing",
          "unit": "kbps",
          "min": 250,
          "typ": null,
          "max": null,
          "conditions": "RL = 3kΩ, CL = 1000pF, one transmitter switching, MBAUD = GND",
          "source_page": 4,
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        {
          "name": "Maximum Data Rate",
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          "conditions": "VCC = 3.0V to 4.5V, RL = 3kΩ, CL = 250pF, one transmitter switching, MBAUD = VCC",
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        },
        {
          "name": "Transmitter Skew",
          "symbol": "|tPHL - tPLH|",
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        {
          "name": "Receiver Skew",
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          "name": "Receiver Output Enable Time",
          "symbol": "",
          "kind": "timing",
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          "min": null,
          "typ": null,
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          "conditions": "Normal operation",
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        {
          "name": "Receiver Output Disable Time",
          "symbol": "",
          "kind": "timing",
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          "min": null,
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          "max": 200,
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        },
        {
          "name": "Transition-Region Slew Rate",
          "symbol": "",
          "kind": "timing",
          "unit": "V/µs",
          "min": 6,
          "typ": null,
          "max": 30,
          "conditions": "VCC = 3.3V, RL = 3Ω to 7kΩ, +3V to -3V or -3V to +3V, TA = +25°C, one transmitter switching, CL = 150pF to 1000pF, MBAUD = GND",
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        {
          "name": "Transition-Region Slew Rate",
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          "min": 24,
          "typ": null,
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          "conditions": "VCC = 3.3V, RL = 3Ω to 7kΩ, +3V to -3V or -3V to +3V, TA = +25°C, one transmitter switching, CL = 150pF to 1000pF, MBAUD = VCC",
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        {
          "name": "Transition-Region Slew Rate",
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          "typ": null,
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          "conditions": "VCC = 3.3V, RL = 3Ω to 7kΩ, +3V to -3V or -3V to +3V, TA = +25°C, one transmitter switching, CL = 150pF to 2500pF, MBAUD = GND",
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        {
          "name": "VCC Supply Voltage (absolute maximum)",
          "symbol": "VCC",
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        {
          "name": "V+ (absolute maximum)",
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        {
          "name": "V- (absolute maximum)",
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        {
          "name": "V+ + V- (absolute maximum)",
          "symbol": "V+ + V-",
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          "unit": "V",
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          "name": "Input Voltage T_IN, SHDN, EN (absolute maximum)",
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          "name": "Receiver Input R_IN (absolute maximum)",
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          "name": "Transmitter Output T_OUT (absolute maximum)",
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          "conditions": "",
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        {
          "name": "Lead Temperature",
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          "unit": "°C",
          "min": null,
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