ST3232BDR

{
  "schema_version": 1,
  "type": "component",
  "slug": "st3232bdr",
  "title": "ST3232BDR",
  "brief": "UMW RS232 ICs, SOP-16. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "comm-uart",
    "st3232bdr"
  ],
  "component": {
    "mpn": "ST3232BDR",
    "manufacturer": "UMW",
    "package": "SOP-16",
    "pin_count": 16,
    "category": "Comm/UART",
    "subcategory": "RS232 ICs",
    "datasheet": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2402231528_UMW-Youtai-Semiconductor-Co---Ltd--ST3232BDR_C2987706.pdf",
    "parts": {
      "symbol": "st3232bdr.kicad_sym",
      "footprint": "st3232bdr.kicad_mod",
      "model_3d": "st3232bdr-etched.glb",
      "model_3d_plain": "st3232bdr.glb",
      "model_3d_step": "st3232bdr-etched.step",
      "model_3d_step_plain": "st3232bdr.step",
      "lbr": "st3232bdr.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "C1+",
        "type": "passive",
        "description": "Positive terminal of the voltage-doubler charge-pump capacitor C1. Connect a 0.1µF ceramic capacitor between C1+ and C1- (pin 3). Part of the internal charge pump generating V+ ≈ +5.5V."
      },
      {
        "number": "2",
        "name": "V+",
        "type": "power_out",
        "description": "Regulated +5.5V rail generated internally by the charge pump. Bypass to GND with a 0.1µF capacitor. Do not load externally beyond the internal driver requirements."
      },
      {
        "number": "3",
        "name": "C1-",
        "type": "passive",
        "description": "Negative terminal of the voltage-doubler charge-pump capacitor C1. Connect to C1+ (pin 1) through a 0.1µF ceramic capacitor."
      },
      {
        "number": "4",
        "name": "C2+",
        "type": "passive",
        "description": "Positive terminal of the inverting charge-pump capacitor C2. Connect a 0.1µF ceramic capacitor between C2+ and C2- (pin 5). Part of the internal charge pump generating V- ≈ -5.5V."
      },
      {
        "number": "5",
        "name": "C2-",
        "type": "passive",
        "description": "Negative terminal of the inverting charge-pump capacitor C2. Connect to C2+ (pin 4) through a 0.1µF ceramic capacitor."
      },
      {
        "number": "6",
        "name": "V-",
        "type": "power_out",
        "description": "Regulated -5.5V rail generated internally by the inverting charge pump. Bypass to GND with a 0.1µF capacitor. Do not load externally beyond the internal driver requirements."
      },
      {
        "number": "7",
        "name": "DOUT2",
        "type": "output",
        "description": "RS-232 driver output for channel 2. Swings between V+ and V- levels (typically ±5.4V). Meets TIA/EIA-232-F output specifications; short-circuit current typically ±35 mA."
      },
      {
        "number": "8",
        "name": "RIN2",
        "type": "input",
        "description": "RS-232 receiver input for channel 2. Accepts ±25V input swing with typical 5kΩ input resistance. Positive-going threshold typ 1.5V, negative-going typ 1.2V (VCC=3.3V); ~0.3V hysteresis."
      },
      {
        "number": "9",
        "name": "ROUT2",
        "type": "output",
        "description": "TTL/CMOS receiver output for channel 2. Drives to VCC-0.1V high / 0.4V low with 1.6 mA sink current. Level-translated version of RIN2 for the host UART."
      },
      {
        "number": "10",
        "name": "DIN2",
        "type": "input",
        "description": "TTL/CMOS driver input for channel 2. VIH ≥ 2.0V (VCC=3.3V) / 2.4V (VCC=5.5V); VIL ≤ 0.8V. Accepts up to 5.5V input even with 3.3V VCC."
      },
      {
        "number": "11",
        "name": "DIN1",
        "type": "input",
        "description": "TTL/CMOS driver input for channel 1. VIH ≥ 2.0V (VCC=3.3V) / 2.4V (VCC=5.5V); VIL ≤ 0.8V. Accepts up to 5.5V input even with 3.3V VCC."
      },
      {
        "number": "12",
        "name": "ROUT1",
        "type": "output",
        "description": "TTL/CMOS receiver output for channel 1. Drives to VCC-0.1V high / 0.4V low with 1.6 mA sink current. Level-translated version of RIN1 for the host UART."
      },
      {
        "number": "13",
        "name": "RIN1",
        "type": "input",
        "description": "RS-232 receiver input for channel 1. Accepts ±25V input swing with typical 5kΩ input resistance. Positive-going threshold typ 1.5V, negative-going typ 1.2V (VCC=3.3V); ~0.3V hysteresis."
      },
      {
        "number": "14",
        "name": "DOUT1",
        "type": "output",
        "description": "RS-232 driver output for channel 1. Swings between V+ and V- levels (typically ±5.4V). Meets TIA/EIA-232-F output specifications; short-circuit current typically ±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 input, +3.0V to +5.5V. Typical supply current 1 mA (no load, VCC=3.3V). Bypass to GND with a 0.1µF ceramic capacitor."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2402231528_UMW-Youtai-Semiconductor-Co---Ltd--ST3232BDR_C2987706.pdf",
        "pages": 11,
        "sha256": "72932421b486abe4",
        "source_tier": "lcsc"
      },
      "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"
    },
    "pin1": {
      "pad": "1",
      "at": [
        -2.475,
        -4.445
      ],
      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "SOIC-16_3.9x9.9mm_P1.27mm@sha256:f9b5075740f7816c",
      "mark": "drawn"
    }
  },
  "metadata": {
    "specs": {
      "Manufacturer": "UMW",
      "Package": "SOP-16",
      "Category": "Comm/UART",
      "Pins": "16"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
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  "discovery_triggers": [
    "st3232bdr"
  ],
  "discovery_pitch": "ST3232BDR (UMW) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "st3232bdr.kicad_sym",
    "st3232bdr.kicad_mod",
    "st3232bdr.glb",
    "st3232bdr.step",
    "st3232bdr-etched.step",
    "st3232bdr.lbr",
    "docs/hero.png",
    "docs/st3232bdr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "variants": [
    {
      "mpn": "ST3232BDR",
      "kind": "packaging"
    }
  ],
  "updated_at": "2026-09-25T08:24:58.439Z"
}