SI24R2E

{
  "slug": "si24r2e",
  "version": "0.1.0",
  "type": "component",
  "description": "Nanjing Zhongke Microelectronics RF Chips, QFN-20-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "radio frequency chip-antenna",
    "si24r2e",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "si24r2e.kicad_sym",
    "si24r2e.kicad_mod",
    "si24r2e.glb",
    "si24r2e.step",
    "si24r2e.lbr",
    "docs/hero.png",
    "docs/si24r2e-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "si24r2e-hero.glb",
    "si24r2e-hero.overlay.json",
    "si24r2e-etched.glb"
  ],
  "component": {
    "mpn": "SI24R2E",
    "manufacturer": "Nanjing Zhongke Microelectronics",
    "package": "QFN-20-EP(4x4)",
    "pin_count": 21,
    "category": "Radio Frequency Chip/Antenna",
    "subcategory": "RF Chips",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/8a78d9ccf703fd24a9bafab8704a98bf.pdf",
    "parts": {
      "symbol": "si24r2e.kicad_sym",
      "footprint": "si24r2e.kicad_mod",
      "model_3d": "si24r2e-hero.glb",
      "model_3d_plain": "si24r2e-etched.glb",
      "model_3d_step": "si24r2e-etched.step",
      "model_3d_step_plain": "si24r2e.step",
      "lbr": "si24r2e.lbr"
    },
    "distributor_links": {
      "lcsc": "C413842"
    },
    "distributor_check": {
      "checked_at": "2026-10-27T00:39:10Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "CE",
        "type": "input",
        "description": "Chip Enable turns the chip on and must be kept clear of disassembly, as stated in the pin function table."
      },
      {
        "number": "2",
        "name": "CSN",
        "type": "input",
        "description": "SPI Chip Select; every new SPI command must start with a high-to-low transition on this pin."
      },
      {
        "number": "3",
        "name": "SCK",
        "type": "input",
        "description": "SPI Clock input, with a maximum SCK frequency of 10 MHz."
      },
      {
        "number": "4",
        "name": "MOSI",
        "type": "input",
        "description": "SPI data input from the master, MOSI (Master Out Slave In)."
      },
      {
        "number": "5",
        "name": "MISO",
        "type": "output",
        "description": "SPI data output to the master; the first byte shifted out is always the STATUS register."
      },
      {
        "number": "6",
        "name": "IRQ",
        "type": "output",
        "description": "Maskable interrupt output, active low."
      },
      {
        "number": "7",
        "name": "VCC",
        "type": "power_in",
        "description": "Power supply, +1.9 to +3.6 V DC."
      },
      {
        "number": "8",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground, 0 V."
      },
      {
        "number": "9",
        "name": "XO",
        "type": "output",
        "description": "Crystal oscillator output, for the 16 MHz crystal (±60 ppm)."
      },
      {
        "number": "10",
        "name": "XI",
        "type": "input",
        "description": "Crystal oscillator input, for the 16 MHz crystal (±60 ppm)."
      },
      {
        "number": "11",
        "name": "VDD_PA",
        "type": "power_out",
        "description": "1.8 V supply output for the internal power amplifier."
      },
      {
        "number": "12",
        "name": "RFP",
        "type": "passive",
        "description": "RF antenna port 1 (differential RF pair with RFN)."
      },
      {
        "number": "13",
        "name": "RFN",
        "type": "passive",
        "description": "RF antenna port 2 (differential RF pair with RFP)."
      },
      {
        "number": "14",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground, 0 V."
      },
      {
        "number": "15",
        "name": "VCC",
        "type": "power_in",
        "description": "Power supply, +1.9 to +3.6 V DC."
      },
      {
        "number": "16",
        "name": "IREF",
        "type": "input",
        "description": "Reference current input for the internal bias."
      },
      {
        "number": "17",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground, 0 V."
      },
      {
        "number": "18",
        "name": "VCC",
        "type": "power_in",
        "description": "Power supply, +1.9 to +3.6 V DC."
      },
      {
        "number": "19",
        "name": "VDD_D",
        "type": "power_out",
        "description": "Positive digital supply output for decoupling purposes."
      },
      {
        "number": "20",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground, 0 V."
      },
      {
        "number": "21",
        "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: The datasheet's pin table lists pins 1-20 as printed on the QFN20 4x4 package. The exposed die pad (",
          "1/21 pins cited to the wrong page (name found elsewhere): ['10:XI@p8']",
          "1/21 pin names appear NOWHERE in the datasheet text: ['9:XO@p8']"
        ],
        "pages_sent": 37,
        "cost_usd": 0.0283,
        "at": "2026-10-27T00:38:37"
      },
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/8a78d9ccf703fd24a9bafab8704a98bf.pdf",
        "pages": 37,
        "sha256": "15175c73931821a7",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 21,
        "described": 21,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "si24r2e.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4.0,
          4.0,
          0.77
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "c9476a1612023de37f27b4972110ab6ac6dc0eaf5ac48957a2e1c497650082a5",
        "checked": "2026-10-27",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "si24r2e-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4.0,
          4.0,
          0.77
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "ab77cc89f20f555ecece09fc2ec348c27ac71083acedeaf11bd6b3e9a1917edb",
        "checked": "2026-10-27",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}