COSMAX3222

{
  "schema_version": 1,
  "type": "component",
  "slug": "cosmax3222",
  "title": "COSMAX3222",
  "brief": "COSINE RS232 ICs, TSSOP-20. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "interface",
    "cosmax3222"
  ],
  "component": {
    "mpn": "COSMAX3222",
    "manufacturer": "COSINE",
    "package": "TSSOP-20",
    "pin_count": 20,
    "category": "Interface",
    "subcategory": "RS232 ICs",
    "datasheet": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2404151526_COSINE-COSMAX3222_C19078605.pdf",
    "parts": {
      "symbol": "cosmax3222.kicad_sym",
      "footprint": "cosmax3222.kicad_mod",
      "model_3d": "cosmax3222-etched.glb",
      "model_3d_plain": "cosmax3222.glb",
      "model_3d_step": "cosmax3222-etched.step",
      "model_3d_step_plain": "cosmax3222.step",
      "lbr": "cosmax3222.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "EN",
        "type": "input",
        "description": "Receiver Enable (active-LOW, EN\\overline). Drive LOW for normal receiver operation; drive HIGH to place receiver outputs in high-impedance (tri-state)."
      },
      {
        "number": "2",
        "name": "C1+",
        "type": "passive",
        "description": "Positive terminal of the voltage-doubler charge-pump flying capacitor (C1, typ. 0.1 uF)."
      },
      {
        "number": "3",
        "name": "V+",
        "type": "power_out",
        "description": "+5.5 V output generated by the internal charge pump. Bypass to GND with a 0.1 uF capacitor (C3)."
      },
      {
        "number": "4",
        "name": "C1-",
        "type": "passive",
        "description": "Negative terminal of the voltage-doubler charge-pump flying capacitor (C1)."
      },
      {
        "number": "5",
        "name": "C2+",
        "type": "passive",
        "description": "Positive terminal of the inverting charge-pump flying capacitor (C2, typ. 0.1 uF)."
      },
      {
        "number": "6",
        "name": "C2-",
        "type": "passive",
        "description": "Negative terminal of the inverting charge-pump flying capacitor (C2)."
      },
      {
        "number": "7",
        "name": "V-",
        "type": "power_out",
        "description": "-5.5 V output generated by the internal inverting charge pump. Bypass to GND with a 0.1 uF capacitor (C4)."
      },
      {
        "number": "8",
        "name": "T2OUT",
        "type": "output",
        "description": "RS-232 driver #2 output. Inverted RS-232-level (nominally +/-5 V) transmit line for connection to the serial port."
      },
      {
        "number": "9",
        "name": "R2IN",
        "type": "input",
        "description": "RS-232 receiver #2 input. Accepts +/-15 V RS-232 signaling from the serial port; internal 5 kOhm pulldown commits output HIGH when input is open."
      },
      {
        "number": "10",
        "name": "R2OUT",
        "type": "tri_state",
        "description": "TTL/CMOS receiver #2 output. Inverted logic-level output of receiver 2; tri-stated when EN\\overline is HIGH."
      },
      {
        "number": "11",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection. Leave floating or tie to GND."
      },
      {
        "number": "12",
        "name": "T2IN",
        "type": "input",
        "description": "TTL/CMOS driver #2 input. Must be a valid HIGH or LOW; no internal pullup, so unused inputs should be tied to VCC or GND."
      },
      {
        "number": "13",
        "name": "T1IN",
        "type": "input",
        "description": "TTL/CMOS driver #1 input. Must be a valid HIGH or LOW; no internal pullup, so unused inputs should be tied to VCC or GND."
      },
      {
        "number": "14",
        "name": "NC",
        "type": "unconnected",
        "description": "No internal connection. Leave floating or tie to GND."
      },
      {
        "number": "15",
        "name": "R1OUT",
        "type": "tri_state",
        "description": "TTL/CMOS receiver #1 output. Inverted logic-level output of receiver 1; tri-stated when EN\\overline is HIGH."
      },
      {
        "number": "16",
        "name": "R1IN",
        "type": "input",
        "description": "RS-232 receiver #1 input. Accepts +/-15 V RS-232 signaling from the serial port; internal 5 kOhm pulldown commits output HIGH when input is open."
      },
      {
        "number": "17",
        "name": "T1OUT",
        "type": "output",
        "description": "RS-232 driver #1 output. Inverted RS-232-level (nominally +/-5 V) transmit line for connection to the serial port."
      },
      {
        "number": "18",
        "name": "GND",
        "type": "power_in",
        "description": "Device ground / 0 V reference."
      },
      {
        "number": "19",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply, 3.0 V to 5.5 V. Bypass to GND with a 0.1 uF capacitor."
      },
      {
        "number": "20",
        "name": "SHDN",
        "type": "input",
        "description": "Shutdown control input (active-LOW, SHDN\\overline). Drive HIGH for normal device operation. Drive LOW to shut down the drivers (high-Z outputs) and disable the on-chip charge pumps; supply current falls below 1 uA."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2404151526_COSINE-COSMAX3222_C19078605.pdf",
        "pages": 11,
        "sha256": "fb0a0d94b62f6d61",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 20,
        "described": 20,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "cosmax3222.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.4,
          6.5,
          1.2
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "97339947f3a7196470ec2f1d9f9b92bb2fc2ab66ad53be0cf105192585ef3c9a",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "cosmax3222-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.4,
          6.5,
          1.2
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "ca4c3641ea3a21d26296f02a5136a6b67161bc8554160fd50581a032071db638",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "COSINE",
      "Package": "TSSOP-20",
      "Category": "Interface",
      "Pins": "20"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "cosmax3222"
  ],
  "discovery_pitch": "COSMAX3222 (COSINE) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "cosmax3222.kicad_sym",
    "cosmax3222.kicad_mod",
    "cosmax3222.glb",
    "cosmax3222.step",
    "cosmax3222.lbr",
    "docs/hero.png",
    "docs/cosmax3222-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "cosmax3222-etched.step"
  ],
  "visibility": {
    "public": true
  },
  "variants": [
    {
      "mpn": "COSMAX3222SR",
      "kind": "packaging"
    },
    {
      "mpn": "COSMAX3222",
      "kind": "packaging"
    }
  ],
  "updated_at": "2026-09-24T19:31:26.505Z"
}