MAX3243CDBR

{
  "schema_version": 1,
  "type": "component",
  "slug": "max3243cdbr",
  "title": "MAX3243CDBR",
  "brief": "Texas Instruments RS232 ICs, SSOP-28. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "interface",
    "max3243cdbr"
  ],
  "component": {
    "mpn": "MAX3243CDBR",
    "manufacturer": "Texas Instruments",
    "package": "SSOP-28",
    "pin_count": 28,
    "category": "Interface",
    "subcategory": "RS232 ICs",
    "datasheet": "https://www.ti.com/lit/ds/symlink/max3243cdbr.pdf",
    "parts": {
      "symbol": "max3243cdbr.kicad_sym",
      "footprint": "max3243cdbr.kicad_mod",
      "model_3d": "max3243cdbr-etched.glb",
      "model_3d_plain": "max3243cdbr.glb",
      "model_3d_step": "max3243cdbr-etched.step",
      "model_3d_step_plain": "max3243cdbr.step",
      "lbr": "max3243cdbr.lbr"
    },
    "distributor_links": {
      "lcsc": "C414614"
    },
    "pins": [
      {
        "number": "1",
        "name": "C2+",
        "type": "passive",
        "description": "Positive lead of C2 charge-pump flying capacitor (0.1 µF at Vcc = 3.3 V; 0.33 µF at Vcc = 5 V)."
      },
      {
        "number": "2",
        "name": "C2-",
        "type": "passive",
        "description": "Negative lead of C2 charge-pump flying capacitor."
      },
      {
        "number": "3",
        "name": "V-",
        "type": "power_out",
        "description": "Negative charge-pump output for storage capacitor only (approximately -5.5 V). Bypass to GND with a 0.1-0.33 µF capacitor."
      },
      {
        "number": "4",
        "name": "RIN1",
        "type": "input",
        "description": "RS-232 receiver 1 line data input from remote RS-232 system. Input voltage range ±25 V; input resistance 3-7 kΩ."
      },
      {
        "number": "5",
        "name": "RIN2",
        "type": "input",
        "description": "RS-232 receiver 2 line data input from remote RS-232 system. Feeds both ROUT2 (gated by FORCEOFF) and the always-active ROUT2B (ring-indicator)."
      },
      {
        "number": "6",
        "name": "RIN3",
        "type": "input",
        "description": "RS-232 receiver 3 line data input from remote RS-232 system."
      },
      {
        "number": "7",
        "name": "RIN4",
        "type": "input",
        "description": "RS-232 receiver 4 line data input from remote RS-232 system."
      },
      {
        "number": "8",
        "name": "RIN5",
        "type": "input",
        "description": "RS-232 receiver 5 line data input from remote RS-232 system."
      },
      {
        "number": "9",
        "name": "DOUT1",
        "type": "output",
        "description": "RS-232 line data output 1 (to remote RS-232 system). Typical VOH = 5.4 V, VOL = -5.4 V into RL = 3 kΩ. High-Z when FORCEOFF is low."
      },
      {
        "number": "10",
        "name": "DOUT2",
        "type": "output",
        "description": "RS-232 line data output 2 (to remote RS-232 system). High-Z when FORCEOFF is low."
      },
      {
        "number": "11",
        "name": "DOUT3",
        "type": "output",
        "description": "RS-232 line data output 3 (to remote RS-232 system). High-Z when FORCEOFF is low."
      },
      {
        "number": "12",
        "name": "DIN3",
        "type": "input",
        "description": "Logic-level data input 3 from UART (drives DOUT3). Accepts 3-V logic on Vcc = 3.3 V and 5-V logic on Vcc = 3.3-5.5 V."
      },
      {
        "number": "13",
        "name": "DIN2",
        "type": "input",
        "description": "Logic-level data input 2 from UART (drives DOUT2)."
      },
      {
        "number": "14",
        "name": "DIN1",
        "type": "input",
        "description": "Logic-level data input 1 from UART (drives DOUT1)."
      },
      {
        "number": "15",
        "name": "ROUT5",
        "type": "output",
        "description": "Logic-level data output 5 to UART (from RIN5). Gated to high-Z by FORCEOFF/auto-powerdown."
      },
      {
        "number": "16",
        "name": "ROUT4",
        "type": "output",
        "description": "Logic-level data output 4 to UART (from RIN4). Gated to high-Z by FORCEOFF/auto-powerdown."
      },
      {
        "number": "17",
        "name": "ROUT3",
        "type": "output",
        "description": "Logic-level data output 3 to UART (from RIN3). Gated to high-Z by FORCEOFF/auto-powerdown."
      },
      {
        "number": "18",
        "name": "ROUT2",
        "type": "output",
        "description": "Logic-level data output 2 to UART (from RIN2). Gated to high-Z by FORCEOFF/auto-powerdown."
      },
      {
        "number": "19",
        "name": "ROUT1",
        "type": "output",
        "description": "Logic-level data output 1 to UART (from RIN1). Gated to high-Z by FORCEOFF/auto-powerdown."
      },
      {
        "number": "20",
        "name": "ROUT2B",
        "type": "output",
        "description": "Always-active non-inverting logic output for RIN2, typically used as a ring-indicator that stays live during auto-powerdown so a wake-on-ring can be detected."
      },
      {
        "number": "21",
        "name": "INVALID",
        "type": "output",
        "description": "Active-low status output; asserts low when all RIN inputs are unpowered/idle (no valid RS-232 signal). Used to trigger auto-powerdown of drivers."
      },
      {
        "number": "22",
        "name": "FORCEOFF",
        "type": "input",
        "description": "Active-low driver disable. Low forces DOUT1-3 and ROUT1-5 to high-Z per device functional modes. Tie high (or to Vcc) for normal operation."
      },
      {
        "number": "23",
        "name": "FORCEON",
        "type": "input",
        "description": "Driver force-on control. High forces drivers on unconditionally; low selects automatic power-down mode (driven by INVALID)."
      },
      {
        "number": "24",
        "name": "C1-",
        "type": "passive",
        "description": "Negative lead of C1 charge-pump flying capacitor (0.047 µF at Vcc = 3.3 V; 0.1 µF at Vcc = 5 V)."
      },
      {
        "number": "25",
        "name": "GND",
        "type": "power_in",
        "description": "Device ground reference (0 V)."
      },
      {
        "number": "26",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply voltage input; 3 V to 5.5 V (recommended 3.0-3.6 V at 3.3-V rail or 4.5-5.5 V at 5-V rail). Bypass with 0.1 µF to GND."
      },
      {
        "number": "27",
        "name": "V+",
        "type": "power_out",
        "description": "Positive charge-pump output for storage capacitor only (approximately +5.5 V). Bypass to GND with 0.1-0.33 µF capacitor."
      },
      {
        "number": "28",
        "name": "C1+",
        "type": "passive",
        "description": "Positive lead of C1 charge-pump flying capacitor."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/max3243cdbr.pdf",
        "pages": 31,
        "sha256": "71f52706280573a4",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 28,
        "described": 28,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "pin1": {
      "pad": "1",
      "at": [
        -3.5,
        -4.225
      ],
      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "SSOP-28_5.3x10.2mm_P0.65mm@sha256:bbb0d0449b996c0a",
      "mark": "drawn"
    },
    "models_3d": [
      {
        "file": "max3243cdbr.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          7.8,
          10.2,
          2.1
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "7aa76979ae41da44bded1ed74115012868f2f3f5a757faf32bb9df4f92c1e313",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "max3243cdbr-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          7.8,
          10.2,
          2.1
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "f7f996d30d42d83e715cdc9ad0096c6af40fe4aadabffaa62737acdfa959e625",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "SSOP-28",
      "Category": "Interface",
      "Pins": "28"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "max3243cdbr"
  ],
  "discovery_pitch": "MAX3243CDBR (Texas Instruments) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "max3243cdbr.kicad_sym",
    "max3243cdbr.kicad_mod",
    "max3243cdbr.glb",
    "max3243cdbr.step",
    "max3243cdbr-etched.step",
    "max3243cdbr.lbr",
    "docs/hero.png",
    "docs/max3243cdbr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "variants": [
    {
      "mpn": "MAX3243CDBRDW",
      "kind": "packaging"
    },
    {
      "mpn": "MAX3243CDBRCDW",
      "kind": "packaging"
    },
    {
      "mpn": "MAX3243CDBRIDW",
      "kind": "packaging"
    },
    {
      "mpn": "MAX3243CDBRCDWR",
      "kind": "packaging"
    },
    {
      "mpn": "MAX3243CDBRIDWR",
      "kind": "packaging"
    },
    {
      "mpn": "MAX3243CDBR",
      "kind": "packaging"
    },
    {
      "mpn": "MAX3243CDBRIDB",
      "kind": "packaging"
    },
    {
      "mpn": "MAX3243CDBRIDBR",
      "kind": "packaging"
    },
    {
      "mpn": "MAX3243CDBRPW",
      "kind": "packaging"
    },
    {
      "mpn": "MAX3243CDBRCPW",
      "kind": "packaging"
    },
    {
      "mpn": "MAX3243CDBRIPW",
      "kind": "packaging"
    },
    {
      "mpn": "MAX3243CDBRCPWR",
      "kind": "packaging"
    },
    {
      "mpn": "MAX3243CDBRIPWR",
      "kind": "packaging"
    }
  ],
  "updated_at": "2026-09-28T18:30:17.875Z"
}