CYW20721B2KUMLGT

{
  "slug": "cyw20721b2kumlgt",
  "version": "0.1.0",
  "type": "component",
  "description": "Infineon Technologies RF Transceiver ICs, QFN-40(5x5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "radio frequency chip-antenna",
    "cyw20721b2kumlgt",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "cyw20721b2kumlgt.kicad_sym",
    "cyw20721b2kumlgt.kicad_mod",
    "cyw20721b2kumlgt.glb",
    "cyw20721b2kumlgt.step",
    "cyw20721b2kumlgt.lbr",
    "docs/hero.png",
    "docs/cyw20721b2kumlgt-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "cyw20721b2kumlgt-hero.glb",
    "cyw20721b2kumlgt-hero.overlay.json",
    "cyw20721b2kumlgt-etched.glb"
  ],
  "component": {
    "mpn": "CYW20721B2KUMLGT",
    "manufacturer": "Infineon Technologies",
    "package": "QFN-40(5x5)",
    "pin_count": 41,
    "category": "Radio Frequency Chip/Antenna",
    "subcategory": "RF Transceiver ICs",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/95968376246a64ea802ccc8e34688ba5.pdf",
    "parts": {
      "symbol": "cyw20721b2kumlgt.kicad_sym",
      "footprint": "cyw20721b2kumlgt.kicad_mod",
      "model_3d": "cyw20721b2kumlgt-hero.glb",
      "model_3d_plain": "cyw20721b2kumlgt-etched.glb",
      "model_3d_step": "cyw20721b2kumlgt-etched.step",
      "model_3d_step_plain": "cyw20721b2kumlgt.step",
      "lbr": "cyw20721b2kumlgt.lbr"
    },
    "distributor_links": {
      "lcsc": "C5690543",
      "digikey": "448-CYW20721B2KUMLGTTR-ND",
      "mouser": "727-CYW20721B2KUMLGT"
    },
    "distributor_check": {
      "checked_at": "2026-10-29T03:25:44Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "448-CYW20721B2KUMLGTTR-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "727-CYW20721B2KUMLGT",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "P28",
        "type": "bidirectional",
        "description": "GPIO P28 with A/D converter input 11 and 16 mA sink current; supermux-programmable to the alternate functions in Tables 6 and 7."
      },
      {
        "number": "2",
        "name": "P29",
        "type": "bidirectional",
        "description": "GPIO P29 with A/D converter input 10 and 16 mA sink current; supermux-programmable to the alternate functions in Tables 6 and 7."
      },
      {
        "number": "3",
        "name": "P0",
        "type": "bidirectional",
        "description": "GPIO P0 that also serves as keyboard scan input KSI0 and A/D converter input 29; supermux I/O functions as defined in Table 6."
      },
      {
        "number": "4",
        "name": "P1",
        "type": "bidirectional",
        "description": "GPIO P1 that also serves as keyboard scan input KSI1 and A/D converter input 28; supermux I/O functions as defined in Table 6."
      },
      {
        "number": "5",
        "name": "P34",
        "type": "bidirectional",
        "description": "GPIO P34 with A/D converter input 5; supermux I/O functions as defined in Table 6."
      },
      {
        "number": "6",
        "name": "P38",
        "type": "bidirectional",
        "description": "GPIO P38 with A/D converter input 1; supermux I/O functions as defined in Table 6."
      },
      {
        "number": "7",
        "name": "P26",
        "type": "bidirectional",
        "description": "GPIO P26 with 16 mA sink current; supermux I/O functions as defined in Table 6."
      },
      {
        "number": "8",
        "name": "P25",
        "type": "bidirectional",
        "description": "GPIO P25; supermux I/O functions as defined in Table 6."
      },
      {
        "number": "9",
        "name": "P33",
        "type": "bidirectional",
        "description": "GPIO P33 with A/D converter input 6; supermux I/O functions as defined in Table 6."
      },
      {
        "number": "10",
        "name": "RST_N",
        "type": "input",
        "description": "Active-low system reset input with internal pull-up resistor; I/O power domain VDDO."
      },
      {
        "number": "11",
        "name": "JTAG_SEL",
        "type": "passive",
        "description": "Reserved Arm JTAG debug mode control; connect to GND for all applications."
      },
      {
        "number": "12",
        "name": "SR_VLX",
        "type": "power_out",
        "description": "Core buck regulator output."
      },
      {
        "number": "13",
        "name": "SR_VDDBAT3V",
        "type": "power_in",
        "description": "Core buck input supply."
      },
      {
        "number": "14",
        "name": "RFLDO_VDDOUT",
        "type": "power_out",
        "description": "RF LDO output."
      },
      {
        "number": "15",
        "name": "RFLDO_VDDIN",
        "type": "power_in",
        "description": "RF LDO input."
      },
      {
        "number": "16",
        "name": "DIGLDO_VDDIN",
        "type": "power_in",
        "description": "Internal digital LDO input."
      },
      {
        "number": "17",
        "name": "BT_PAVDD",
        "type": "power_in",
        "description": "PA supply."
      },
      {
        "number": "18",
        "name": "BT_RF",
        "type": "passive",
        "description": "RF antenna port."
      },
      {
        "number": "19",
        "name": "BT_IFVDD1P2",
        "type": "power_in",
        "description": "IFPLL power supply (1.2 V domain)."
      },
      {
        "number": "20",
        "name": "BT_VCOVDD1P2",
        "type": "power_in",
        "description": "VCO supply (1.2 V domain)."
      },
      {
        "number": "21",
        "name": "BT_PLLVDD1P2",
        "type": "power_in",
        "description": "RFPLL and crystal oscillator supply (1.2 V domain)."
      },
      {
        "number": "22",
        "name": "BT_XTALI",
        "type": "input",
        "description": "Crystal oscillator input; the XTAL must have an accuracy of ±20 ppm per the Bluetooth specification and two external load capacitors are required, selected per the XTAL (see Figure 2)."
      },
      {
        "number": "23",
        "name": "BT_XTALO",
        "type": "output",
        "description": "Crystal oscillator output."
      },
      {
        "number": "24",
        "name": "BT_HOST_WAKE",
        "type": "output",
        "description": "Signal from the CYW20721 to the host indicating that the Bluetooth device requires attention; I/O power domain VDDO."
      },
      {
        "number": "25",
        "name": "BT_VDDO",
        "type": "power_in",
        "description": "I/O pad power supply; I/O power domain VDDO."
      },
      {
        "number": "26",
        "name": "Reserved",
        "type": "unconnected",
        "description": "Reserved; leave unconnected."
      },
      {
        "number": "27",
        "name": "BT_UART_RXD",
        "type": "input",
        "description": "UART serial input; serial data input for the HCI UART interface, I/O power domain VDDO."
      },
      {
        "number": "28",
        "name": "BT_UART_TXD",
        "type": "output",
        "description": "UART serial output; serial data output for the HCI UART interface, with pull-up (PU) on the I/O power domain VDDO."
      },
      {
        "number": "29",
        "name": "BT_UART_RTS_N",
        "type": "output",
        "description": "Request to send (RTS) for the HCI UART interface, with pull-up (PU); leave unconnected if not used."
      },
      {
        "number": "30",
        "name": "BT_UART_CTS_N",
        "type": "input",
        "description": "Clear to send (CTS) for the HCI UART interface, with pull-up (PU); leave unconnected if not used."
      },
      {
        "number": "31",
        "name": "XTALO_32K",
        "type": "output",
        "description": "Low-power oscillator output; I/O power domain VDDO."
      },
      {
        "number": "32",
        "name": "XTALI_32K / P15",
        "type": "input",
        "description": "Low-power oscillator input (XTALI_32K) that is shared with GPIO P15 (A/D converter input 20); P15 should not be driven high externally while the part is held in reset."
      },
      {
        "number": "33",
        "name": "P16",
        "type": "bidirectional",
        "description": "GPIO P16 with A/D converter input 19; supermux I/O functions as defined in Table 6."
      },
      {
        "number": "34",
        "name": "P2",
        "type": "bidirectional",
        "description": "GPIO P2 with keyboard scan input KSI2; supermux I/O functions as defined in Table 6."
      },
      {
        "number": "35",
        "name": "P4",
        "type": "bidirectional",
        "description": "GPIO P4 with keyboard scan input KSI4; supermux I/O functions as defined in Table 6."
      },
      {
        "number": "36",
        "name": "P6",
        "type": "bidirectional",
        "description": "GPIO P6 with keyboard scan input KSI6; supermux I/O functions as defined in Table 6."
      },
      {
        "number": "37",
        "name": "P7",
        "type": "bidirectional",
        "description": "GPIO P7 with keyboard scan input KSI7; supermux I/O functions as defined in Table 6."
      },
      {
        "number": "38",
        "name": "P17",
        "type": "bidirectional",
        "description": "GPIO P17 with A/D converter input 18; supermux I/O functions as defined in Table 6."
      },
      {
        "number": "39",
        "name": "VDDO",
        "type": "power_in",
        "description": "LHL pad power supply; can be tied to BT_VDDO."
      },
      {
        "number": "40",
        "name": "P10",
        "type": "bidirectional",
        "description": "GPIO P10 with keyboard scan output KSO2 and A/D converter input 25; supermux I/O functions as defined in Table 6."
      },
      {
        "number": "41",
        "name": "EP",
        "type": "passive",
        "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.3",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.3",
        "primary_model": "claude-haiku-5-5",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: MPN suffix mismatch: the requested MPN is CYW20721B2KUMLGT, but the ordering table (Table 30, page 4; Pin 32 is a shared pin: Table 4 lists it as XTALI_32K and Table 5 as P15 (figure 6 labels it xtali_3; The QFN exposed center pad (VSS, 'connect to ground') has no pin number printed on the package, so i",
          "exposed pad 41 added from the footprint"
        ],
        "pages_sent": 18,
        "cost_usd": 0.1112,
        "at": "2026-10-29T03:25:29"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/95968376246a64ea802ccc8e34688ba5.pdf",
        "pages": 47,
        "sha256": "b8098c691c998147",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 41,
        "described": 41,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "cyw20721b2kumlgt.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          5.0,
          5.0,
          0.77
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "8f37bc7a9aab4742c34f137d9822c0352acc227532830034555744338483cdfc",
        "checked": "2026-10-29",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "cyw20721b2kumlgt-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          5.0,
          5.0,
          0.77
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "5c6c504427370da784f9d3b98bd3355d9fdcb7da96328324bdb29ff4ffd25bb0",
        "checked": "2026-10-29",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}