MAX3232

{
  "schema_version": 1,
  "type": "component",
  "slug": "max3232",
  "title": "MAX3232",
  "brief": "TI dual RS-232 transceiver, SOIC-16. 3-5.5 V supply, on-chip charge pump, 2 drivers + 2 receivers. The 3V MAX232. Datasheet-verified.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "interface",
    "rs-232",
    "transceiver",
    "level-shifter",
    "soic-16",
    "texas-instruments"
  ],
  "component": {
    "mpn": "MAX3232",
    "manufacturer": "Texas Instruments",
    "package": "SOIC-16",
    "pin_count": 16,
    "category": "Interface IC",
    "subcategory": "RS-232 transceiver (3 V)",
    "datasheet": "https://www.ti.com/lit/ds/symlink/max3232.pdf",
    "parts": {
      "symbol": "max3232.kicad_sym",
      "footprint": "max3232.kicad_mod",
      "model_3d": "max3232-etched.glb",
      "model_3d_plain": "max3232.glb",
      "lbr": "max3232.lbr",
      "model_3d_step": "max3232-etched.step",
      "model_3d_step_plain": "max3232.step"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "C1+",
        "type": "passive",
        "description": "Positive lead of charge-pump capacitor C1 (typ. 0.1 µF at VCC = 3.3 V, or 0.047 µF at VCC = 5 V). Connect between C1+ and C1- as part of the charge-pump network."
      },
      {
        "number": "2",
        "name": "V+",
        "type": "power_out",
        "description": "Positive charge-pump output for storage capacitor only. Nominally VCC-referenced positive rail generated by the internal charge pump (approx. +5.5 V). Connect a 0.1 µF (or 0.33 µF at 5 V) storage capacitor from V+ to GND."
      },
      {
        "number": "3",
        "name": "C1-",
        "type": "passive",
        "description": "Negative lead of charge-pump capacitor C1. Connect between C1+ and C1- as part of the charge-pump network."
      },
      {
        "number": "4",
        "name": "C2+",
        "type": "passive",
        "description": "Positive lead of charge-pump capacitor C2 (typ. 0.1 µF at 3.3 V, or 0.33 µF at 5 V). Connect between C2+ and C2- as part of the inverter charge-pump network."
      },
      {
        "number": "5",
        "name": "C2-",
        "type": "passive",
        "description": "Negative lead of charge-pump capacitor C2. Connect between C2+ and C2- as part of the inverter charge-pump network."
      },
      {
        "number": "6",
        "name": "V-",
        "type": "power_out",
        "description": "Negative charge-pump output for storage capacitor only. Inverted negative rail (approx. -5.5 V) generated by the internal charge pump. Connect a 0.1 µF (or 0.33 µF at 5 V) storage capacitor from V- to GND."
      },
      {
        "number": "7",
        "name": "DOUT2",
        "type": "output",
        "description": "RS-232 line data output for channel 2 (to remote RS-232 system). Driver output swings between V+ and V- (typ. ±5.4 V), short-circuit protected to ground (Ios ~ ±35 mA)."
      },
      {
        "number": "8",
        "name": "RIN2",
        "type": "input",
        "description": "RS-232 line data input for channel 2 (from remote RS-232 system). Includes internal 3-7 kΩ RS-232 load; input voltage range ±25 V. Thresholds: VIT+ typ 1.5-1.8 V, VIT- typ 0.6-0.8 V."
      },
      {
        "number": "9",
        "name": "ROUT2",
        "type": "output",
        "description": "Logic-level data output for channel 2 (to UART). CMOS-level output referenced to VCC; VOH ≥ VCC-0.6 V at IOH = -1 mA, VOL ≤ 0.4 V at IOL = 1.6 mA. Inverted from RIN2; open RIN gives high ROUT."
      },
      {
        "number": "10",
        "name": "DIN2",
        "type": "input",
        "description": "Logic-level data input for channel 2 (from UART). Accepts 3-V or 5-V logic (VIH ≥ 2 V at VCC = 3.3 V, ≥ 2.4 V at VCC = 5 V; VIL ≤ 0.8 V). Input range 0 to 5.5 V; must be driven valid high or low."
      },
      {
        "number": "11",
        "name": "DIN1",
        "type": "input",
        "description": "Logic-level data input for channel 1 (from UART). Accepts 3-V or 5-V logic (VIH ≥ 2 V at VCC = 3.3 V, ≥ 2.4 V at VCC = 5 V; VIL ≤ 0.8 V). Input range 0 to 5.5 V; must be driven valid high or low."
      },
      {
        "number": "12",
        "name": "ROUT1",
        "type": "output",
        "description": "Logic-level data output for channel 1 (to UART). CMOS-level output referenced to VCC; VOH ≥ VCC-0.6 V at IOH = -1 mA, VOL ≤ 0.4 V at IOL = 1.6 mA. Inverted from RIN1; open RIN gives high ROUT."
      },
      {
        "number": "13",
        "name": "RIN1",
        "type": "input",
        "description": "RS-232 line data input for channel 1 (from remote RS-232 system). Includes internal 3-7 kΩ RS-232 load; input voltage range ±25 V. Thresholds: VIT+ typ 1.5-1.8 V, VIT- typ 0.6-0.8 V."
      },
      {
        "number": "14",
        "name": "DOUT1",
        "type": "output",
        "description": "RS-232 line data output for channel 1 (to remote RS-232 system). Driver output swings between V+ and V- (typ. ±5.4 V), short-circuit protected to ground (Ios ~ ±35 mA)."
      },
      {
        "number": "15",
        "name": "GND",
        "type": "power_in",
        "description": "Device ground reference. All voltages are with respect to this network GND."
      },
      {
        "number": "16",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply voltage; connect to external 3 V to 5.5 V power supply (recommended 3.0-3.6 V or 4.5-5.5 V). ICC typical 0.3 mA, max 1 mA at no load. Bypass with 0.1 µF."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/max3232.pdf",
        "pages": 30,
        "sha256": "13b1834e8de7c628",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 16,
        "described": 16,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "max3232.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          9.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "d5eeddb4c0b304dc61950919b126fc61d7586abd5f16ab71a2a79759ec6498bf",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "max3232-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          9.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "fac43e2030741889cf21cd58e1f36624a25ff01b8396afe65bbd07eb0fb2d395",
        "checked": "2026-10-26",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Type": "Dual RS-232 transceiver",
      "Drivers / receivers": "2 / 2",
      "Supply voltage": "3-5.5 V (single)",
      "Level generation": "on-chip charge pump (4 caps)",
      "Data rate": "up to 250 kbit/s",
      "Compatibility": "pin-identical to MAX232",
      "ESD": "±15 kV (line pins)",
      "Package": "SOIC-16"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "max3232",
    "rs-232 transceiver",
    "3v rs232",
    "serial level shifter",
    "max232 3v"
  ],
  "discovery_pitch": "MAX3232 dual RS-232 transceiver (SOIC-16, 3 V) with datasheet-verified pinout, KiCad symbol/footprint/3D, and full provenance.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "max3232.kicad_sym",
    "max3232.kicad_mod",
    "max3232.glb",
    "max3232.lbr",
    "docs/hero.png",
    "docs/max3232-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "max3232-etched.step"
  ],
  "variants": [
    {
      "mpn": "MAX3232CDR (SOIC-16)",
      "kind": "packaging"
    },
    {
      "mpn": "MAX3232IDR (SOIC-16, industrial)",
      "kind": "packaging"
    }
  ]
}