ST232BDR

{
  "schema_version": 1,
  "type": "component",
  "slug": "st232bdr",
  "title": "ST232BDR",
  "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",
    "st232bdr"
  ],
  "component": {
    "mpn": "ST232BDR",
    "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--ST232BDR_C2987705.pdf",
    "parts": {
      "symbol": "st232bdr.kicad_sym",
      "footprint": "st232bdr.kicad_mod",
      "model_3d": "st232bdr-etched.glb",
      "model_3d_plain": "st232bdr.glb",
      "model_3d_step": "st232bdr-etched.step",
      "model_3d_step_plain": "st232bdr.step",
      "lbr": "st232bdr.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "C1+",
        "type": "passive",
        "description": "Positive terminal of the voltage-doubler charge-pump capacitor C1. Connect a 0.1 µF capacitor between C1+ (pin 1) and C1- (pin 3)."
      },
      {
        "number": "2",
        "name": "V+",
        "type": "power_out",
        "description": "Regulated +2·VCC (approx. +10 V) output generated by the internal charge pump. Bypass to GND with a 0.1 µF capacitor."
      },
      {
        "number": "3",
        "name": "C1-",
        "type": "passive",
        "description": "Negative terminal of the voltage-doubler charge-pump capacitor C1. Paired with C1+ (pin 1) via a 0.1 µF capacitor."
      },
      {
        "number": "4",
        "name": "C2+",
        "type": "passive",
        "description": "Positive terminal of the inverter charge-pump capacitor C2. Connect a 0.1 µF capacitor between C2+ (pin 4) and C2- (pin 5)."
      },
      {
        "number": "5",
        "name": "C2-",
        "type": "passive",
        "description": "Negative terminal of the inverter charge-pump capacitor C2. Paired with C2+ (pin 4) via a 0.1 µF capacitor."
      },
      {
        "number": "6",
        "name": "V-",
        "type": "power_out",
        "description": "Regulated -2·VCC (approx. -10 V) output generated by the internal inverting charge pump. Bypass to GND with a 0.1 µF capacitor."
      },
      {
        "number": "7",
        "name": "T2OUT",
        "type": "output",
        "description": "RS-232 driver 2 output. Swings between V+ and V- (typical ±5 V into a 3 kΩ load), inverted from the T2IN TTL/CMOS input."
      },
      {
        "number": "8",
        "name": "R2IN",
        "type": "input",
        "description": "RS-232 receiver 2 input. Accepts EIA/TIA-232E line levels (±30 V absolute max) with an internal 3-7 kΩ pull-down and hysteresis (VIL≈0.8 V, VIH≈2.4 V)."
      },
      {
        "number": "9",
        "name": "R2OUT",
        "type": "output",
        "description": "TTL/CMOS receiver 2 output (inverted from R2IN). Drives VOL ≤ 0.4 V at 3.2 mA and VOH ≥ 3.5 V at -1 mA."
      },
      {
        "number": "10",
        "name": "T2IN",
        "type": "input",
        "description": "TTL/CMOS driver 2 input. High-impedance CMOS input (VIL ≤ 0.8 V, VIH ≥ 2 V) whose logic level is inverted and level-shifted to the T2OUT RS-232 line driver."
      },
      {
        "number": "11",
        "name": "T1IN",
        "type": "input",
        "description": "TTL/CMOS driver 1 input. High-impedance CMOS input (VIL ≤ 0.8 V, VIH ≥ 2 V) whose logic level is inverted and level-shifted to the T1OUT RS-232 line driver."
      },
      {
        "number": "12",
        "name": "R1OUT",
        "type": "output",
        "description": "TTL/CMOS receiver 1 output (inverted from R1IN). Drives VOL ≤ 0.4 V at 3.2 mA and VOH ≥ 3.5 V at -1 mA."
      },
      {
        "number": "13",
        "name": "R1IN",
        "type": "input",
        "description": "RS-232 receiver 1 input. Accepts EIA/TIA-232E line levels (±30 V absolute max) with an internal 3-7 kΩ pull-down and hysteresis (VIL≈0.8 V, VIH≈2.4 V)."
      },
      {
        "number": "14",
        "name": "T1OUT",
        "type": "output",
        "description": "RS-232 driver 1 output. Swings between V+ and V- (typical ±5 V into a 3 kΩ load), inverted from the T1IN TTL/CMOS input."
      },
      {
        "number": "15",
        "name": "GND",
        "type": "power_in",
        "description": "Device ground reference and return path for the charge-pump bypass capacitors on V+ and V-."
      },
      {
        "number": "16",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply input, +4.5 V to +5.5 V. Typical quiescent supply current ICC ≤ 10 mA (no load, 25 °C). Bypass to GND with a 0.1 µF capacitor."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2402231528_UMW-Youtai-Semiconductor-Co---Ltd--ST232BDR_C2987705.pdf",
        "pages": 10,
        "sha256": "2e25f6be595237d6",
        "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"
    },
    "models_3d": [
      {
        "file": "st232bdr.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          9.9,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "d5eeddb4c0b304dc61950919b126fc61d7586abd5f16ab71a2a79759ec6498bf",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "st232bdr-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          9.9,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "1d929241ec277d39ebccdec6fc9b315526a6c001d33bc136519d11af5026fe1c",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "UMW",
      "Package": "SOP-16",
      "Category": "Comm/UART",
      "Pins": "16"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "st232bdr"
  ],
  "discovery_pitch": "ST232BDR (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",
    "st232bdr.kicad_sym",
    "st232bdr.kicad_mod",
    "st232bdr.glb",
    "st232bdr.step",
    "st232bdr-etched.step",
    "st232bdr.lbr",
    "docs/hero.png",
    "docs/st232bdr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "variants": [
    {
      "mpn": "ST232BDR",
      "kind": "packaging"
    },
    {
      "mpn": "ST232CDR",
      "kind": "unknown"
    }
  ],
  "updated_at": "2026-09-25T08:24:00.441Z"
}