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Ray Set visibility: public 7a56bd1 7h ago
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{
  "schema_version": 1,
  "type": "component",
  "slug": "si24r2e",
  "title": "SI24R2E",
  "brief": "Nanjing Zhongke Microelectronics RF Chips, QFN-20-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "radio frequency chip-antenna",
    "si24r2e",
    "factory-2.0.0",
    "extractor-text"
  ],
  "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,
          4,
          0.77
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 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,
          4,
          0.77
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "ab77cc89f20f555ecece09fc2ec348c27ac71083acedeaf11bd6b3e9a1917edb",
        "checked": "2026-10-27",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Nanjing Zhongke Microelectronics",
      "Package": "QFN-20-EP(4x4)",
      "Category": "Radio Frequency Chip/Antenna",
      "Pins": "21"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "15175c73931821a764c5e1cb96c955cac0b763b1fab8d1fbcb103d50cd9797d1",
      "rows": [
        {
          "name": "Supply voltage VDD",
          "symbol": "VDD",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 3.6,
          "conditions": "",
          "source_page": 23,
          "source": "datasheet"
        },
        {
          "name": "Input Voltage",
          "symbol": "VI",
          "kind": "absolute_maximum",
          "unit": "V",
          "min": -0.3,
          "typ": null,
          "max": 5.25,
          "conditions": "",
          "source_page": 23,
          "source": "datasheet"
        },
        {
          "name": "Power Dissipation",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "mW",
          "min": null,
          "typ": null,
          "max": 100,
          "conditions": "",
          "source_page": 23,
          "source": "datasheet"
        },
        {
          "name": "Operation Temperature",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "",
          "source_page": 23,
          "source": "datasheet"
        },
        {
          "name": "Storage Temperature",
          "symbol": "",
          "kind": "absolute_maximum",
          "unit": "℃",
          "min": -40,
          "typ": null,
          "max": 125,
          "conditions": "",
          "source_page": 23,
          "source": "datasheet"
        },
        {
          "name": "Supply voltage",
          "symbol": "VDD",
          "kind": "electrical",
          "unit": "V",
          "min": 1.9,
          "typ": null,
          "max": 3.6,
          "conditions": "",
          "source_page": 23,
          "source": "datasheet"
        },
        {
          "name": "RF operation frequency",
          "symbol": "FOP",
          "kind": "electrical",
          "unit": "MHz",
          "min": 2400,
          "typ": null,
          "max": 2525,
          "conditions": "",
          "source_page": 24,
          "source": "datasheet"
        },
        {
          "name": "Frequency deviation 2Mbps",
          "symbol": "ΔFMOD(2Mbps)",
          "kind": "tolerance",
          "unit": "KHz",
          "min": -330,
          "typ": null,
          "max": 330,
          "conditions": "",
          "source_page": 24,
          "source": "datasheet"
        },
        {
          "name": "Frequency deviation 1M/250Kbps",
          "symbol": "ΔFMOD(1M/250Kbps)",
          "kind": "tolerance",
          "unit": "KHz",
          "min": -175,
          "typ": null,
          "max": 175,
          "conditions": "",
          "source_page": 24,
          "source": "datasheet"
        },
        {
          "name": "Data rate",
          "symbol": "RGFSK",
          "kind": "electrical",
          "unit": "Kbps",
          "min": 250,
          "typ": null,
          "max": 2000,
          "conditions": "",
          "source_page": 24,
          "source": "datasheet"
        },
        {
          "name": "RF Output Power",
          "symbol": "PRF",
          "kind": "electrical",
          "unit": "dBm",
          "min": -30,
          "typ": null,
          "max": 7,
          "conditions": "",
          "source_page": 24,
          "source": "datasheet"
        },
        {
          "name": "1st Adjacent CH Power 2MHz",
          "symbol": "PRF1",
          "kind": "electrical",
          "unit": "dBm",
          "min": null,
          "typ": null,
          "max": -20,
          "conditions": "1st Adjacent CH Power 2MHz",
          "source_page": 25,
          "source": "datasheet"
        },
        {
          "name": "2nd Adjacent CH Power 4MHz",
          "symbol": "PRF2",
          "kind": "electrical",
          "unit": "dBm",
          "min": null,
          "typ": null,
          "max": -46,
          "conditions": "2nd Adjacent CH Power 4MHz",
          "source_page": 25,
          "source": "datasheet"
        },
        {
          "name": "Crystal frequency tolerance",
          "symbol": "ΔF",
          "kind": "tolerance",
          "unit": "ppm",
          "min": -60,
          "typ": null,
          "max": 60,
          "conditions": "",
          "source_page": 25,
          "source": "datasheet"
        },
        {
          "name": "Tdc Data to SCK Setup",
          "symbol": "Tdc",
          "kind": "timing",
          "unit": "ns",
          "min": 2,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 18,
          "source": "datasheet"
        },
        {
          "name": "SCK to Data Hold",
          "symbol": "Tdh",
          "kind": "timing",
          "unit": "ns",
          "min": 2,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 18,
          "source": "datasheet"
        },
        {
          "name": "CSN to Data Valid",
          "symbol": "Tcsd",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": null,
          "max": 42,
          "conditions": "",
          "source_page": 18,
          "source": "datasheet"
        },
        {
          "name": "SCK to Data Valid",
          "symbol": "Tcd",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": null,
          "max": 58,
          "conditions": "",
          "source_page": 18,
          "source": "datasheet"
        },
        {
          "name": "SCK Low Time",
          "symbol": "Tcl",
          "kind": "timing",
          "unit": "ns",
          "min": 40,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 18,
          "source": "datasheet"
        },
        {
          "name": "SCK High Time",
          "symbol": "Tch",
          "kind": "timing",
          "unit": "ns",
          "min": 40,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 18,
          "source": "datasheet"
        },
        {
          "name": "SCK Frequency",
          "symbol": "Fsck",
          "kind": "timing",
          "unit": "MHz",
          "min": 0,
          "typ": null,
          "max": 10,
          "conditions": "",
          "source_page": 18,
          "source": "datasheet"
        },
        {
          "name": "SCK Rise and Fall",
          "symbol": "Tr,Tf",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": null,
          "max": 100,
          "conditions": "",
          "source_page": 18,
          "source": "datasheet"
        },
        {
          "name": "CSN to SCK Setup",
          "symbol": "Tcc",
          "kind": "timing",
          "unit": "ns",
          "min": 2,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 18,
          "source": "datasheet"
        },
        {
          "name": "SCK to CSN Hold",
          "symbol": "Tcch",
          "kind": "timing",
          "unit": "ns",
          "min": 2,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 18,
          "source": "datasheet"
        },
        {
          "name": "CSN Inactive time",
          "symbol": "Tcwh",
          "kind": "timing",
          "unit": "ns",
          "min": 50,
          "typ": null,
          "max": null,
          "conditions": "",
          "source_page": 18,
          "source": "datasheet"
        },
        {
          "name": "CSN to Output High Z",
          "symbol": "Tcdz",
          "kind": "timing",
          "unit": "ns",
          "min": null,
          "typ": null,
          "max": 42,
          "conditions": "",
          "source_page": 18,
          "source": "datasheet"
        },
        {
          "name": "Supply current in Shutdown mode",
          "symbol": "ISHD",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 0.7,
          "max": null,
          "conditions": "",
          "source_page": 23,
          "source": "datasheet"
        },
        {
          "name": "Supply current in Sleep mode",
          "symbol": "Isleep",
          "kind": "electrical",
          "unit": "uA",
          "min": null,
          "typ": 0.7,
          "max": null,
          "conditions": "RCOSC,Watchdog and ATR Timer are active",
          "source_page": 23,
          "source": "datasheet"
        },
        {
          "name": "Supply current in Standby mode",
          "symbol": "ISTB",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 15,
          "max": null,
          "conditions": "",
          "source_page": 23,
          "source": "datasheet"
        },
        {
          "name": "Supply current in Idle-TX mode",
          "symbol": "IIDLE",
          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": 380,
          "max": null,
          "conditions": "",
          "source_page": 23,
          "source": "datasheet"
        },
        {
          "name": "TX mode supply current @7 dBm output power",
          "symbol": "ITX@7dBm",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 25,
          "max": null,
          "conditions": "@7 dBm output power",
          "source_page": 24,
          "source": "datasheet"
        },
        {
          "name": "TX mode supply current @4 dBm output power",
          "symbol": "ITX@4dBm",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 17,
          "max": null,
          "conditions": "@4 dBm output power",
          "source_page": 24,
          "source": "datasheet"
        },
        {
          "name": "TX mode supply current @0 dBm output power",
          "symbol": "ITX@0dBm",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 13.5,
          "max": null,
          "conditions": "@0 dBm output power",
          "source_page": 24,
          "source": "datasheet"
        },
        {
          "name": "TX mode supply current @-6 dBm output power",
          "symbol": "ITX@-6dBm",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 10,
          "max": null,
          "conditions": "@-6 dBm output power",
          "source_page": 24,
          "source": "datasheet"
        },
        {
          "name": "TX mode supply current @-12 dBm output power",
          "symbol": "ITX@-12dBm",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 8.5,
          "max": null,
          "conditions": "@-12 dBm output power",
          "source_page": 24,
          "source": "datasheet"
        },
        {
          "name": "RF channel space",
          "symbol": "FCH",
          "kind": "electrical",
          "unit": "MHz",
          "min": null,
          "typ": 1,
          "max": null,
          "conditions": "2MHz at least when 2Mpbs",
          "source_page": 24,
          "source": "datasheet"
        },
        {
          "name": "Modulation Bandwidth 2Mbps",
          "symbol": "PBW@2Mbps",
          "kind": "electrical",
          "unit": "MHz",
          "min": null,
          "typ": 2.1,
          "max": null,
          "conditions": "",
          "source_page": 24,
          "source": "datasheet"
        },
        {
          "name": "Modulation Bandwidth 1Mbps",
          "symbol": "PBW@1Mbps",
          "kind": "electrical",
          "unit": "MHz",
          "min": null,
          "typ": 1.1,
          "max": null,
          "conditions": "",
          "source_page": 24,
          "source": "datasheet"
        },
        {
          "name": "Modulation Bandwidth 250Kbps",
          "symbol": "PBW@250Kbps",
          "kind": "electrical",
          "unit": "MHz",
          "min": null,
          "typ": 0.9,
          "max": null,
          "conditions": "",
          "source_page": 24,
          "source": "datasheet"
        },
        {
          "name": "Crystal frequency",
          "symbol": "FXO",
          "kind": "electrical",
          "unit": "MHz",
          "min": null,
          "typ": 16,
          "max": null,
          "conditions": "",
          "source_page": 25,
          "source": "datasheet"
        },
        {
          "name": "Equivalent Series Resistance",
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