Si24R2H

{
  "slug": "si24r2h",
  "version": "0.1.0",
  "type": "component",
  "description": "Nanjing Zhongke Microelectronics RF Transceiver ICs, QFN-32-EP(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "rf and wireless",
    "si24r2h",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "si24r2h.kicad_sym",
    "si24r2h.kicad_mod",
    "si24r2h.glb",
    "si24r2h.step",
    "si24r2h.lbr",
    "docs/hero.png",
    "docs/si24r2h-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "si24r2h-hero.glb",
    "si24r2h-hero.overlay.json",
    "si24r2h-etched.glb"
  ],
  "component": {
    "mpn": "Si24R2H",
    "manufacturer": "Nanjing Zhongke Microelectronics",
    "package": "QFN-32-EP(4x4)",
    "pin_count": 33,
    "category": "RF And Wireless",
    "subcategory": "RF Transceiver ICs",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588893794662567936",
    "parts": {
      "symbol": "si24r2h.kicad_sym",
      "footprint": "si24r2h.kicad_mod",
      "model_3d": "si24r2h-hero.glb",
      "model_3d_plain": "si24r2h-etched.glb",
      "model_3d_step": "si24r2h-etched.step",
      "model_3d_step_plain": "si24r2h.step",
      "lbr": "si24r2h.lbr"
    },
    "distributor_links": {
      "lcsc": "C2760391"
    },
    "distributor_check": {
      "checked_at": "2026-10-17T21:49:54Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "NTC_VB",
        "type": "output",
        "description": "NTC bias-voltage analog output for the thermistor temperature-sensing circuit."
      },
      {
        "number": "2",
        "name": "NTC_VB_N",
        "type": "passive",
        "description": "NTC bias-voltage analog pin, paired with NTC_VB."
      },
      {
        "number": "3",
        "name": "XIN",
        "type": "input",
        "description": "Optional 32.768 kHz crystal oscillator input; when an external clock is applied to XOUT, XIN must be connected to VCC."
      },
      {
        "number": "4",
        "name": "XOUT",
        "type": "output",
        "description": "Optional 32.768 kHz crystal oscillator output, which also serves as the direct input for an external 125 kHz-receiver clock."
      },
      {
        "number": "5",
        "name": "DAT",
        "type": "output",
        "description": "Data output carrying the demodulated 125 kHz receiver signal."
      },
      {
        "number": "6",
        "name": "GND",
        "type": "power_in",
        "description": "Ground (0 V)."
      },
      {
        "number": "7",
        "name": "VCC",
        "type": "power_in",
        "description": "Power supply, 2.4 V to 3.6 V (typical 3 V)."
      },
      {
        "number": "8",
        "name": "CL_DAT",
        "type": "output",
        "description": "Manchester-recovered clock output; DAT data is stable on the rising edge of CL_DAT."
      },
      {
        "number": "9",
        "name": "LF3P",
        "type": "input",
        "description": "125 kHz receiver channel 3 input."
      },
      {
        "number": "10",
        "name": "LF2P",
        "type": "input",
        "description": "125 kHz receiver channel 2 input."
      },
      {
        "number": "11",
        "name": "LF1P",
        "type": "input",
        "description": "125 kHz receiver channel 1 input."
      },
      {
        "number": "12",
        "name": "LFN",
        "type": "input",
        "description": "Common ground for the 125 kHz receiver channels."
      },
      {
        "number": "13",
        "name": "VDD_D",
        "type": "power_in",
        "description": "Internal supply pin."
      },
      {
        "number": "14",
        "name": "VSS_D",
        "type": "power_in",
        "description": "Ground pin."
      },
      {
        "number": "15",
        "name": "CE",
        "type": "input",
        "description": "Transmitter enable input, multiplexed as an anti-tamper control signal."
      },
      {
        "number": "16",
        "name": "CSN",
        "type": "input",
        "description": "SPI chip-select input; the SPI interface is active when CSN goes from high to low."
      },
      {
        "number": "17",
        "name": "SCK",
        "type": "input",
        "description": "SPI clock input, also multiplexed as the key-transmit and replacement-transmit control signal."
      },
      {
        "number": "18",
        "name": "MOSI",
        "type": "input",
        "description": "SPI data input, also multiplexed as the key-transmit and replacement-transmit control signal."
      },
      {
        "number": "19",
        "name": "MISO",
        "type": "output",
        "description": "SPI data output, which is high-impedance when not outputting data."
      },
      {
        "number": "20",
        "name": "IRQ",
        "type": "output",
        "description": "Maskable interrupt output, active low."
      },
      {
        "number": "21",
        "name": "VDD",
        "type": "power_in",
        "description": "Power supply pin."
      },
      {
        "number": "22",
        "name": "SDA",
        "type": "bidirectional",
        "description": "I2C data line for the external temperature sensor; a pull-up resistor to the supply is required even when no external sensor is used."
      },
      {
        "number": "23",
        "name": "SCL",
        "type": "output",
        "description": "I2C clock line for the external temperature sensor."
      },
      {
        "number": "24",
        "name": "XO",
        "type": "output",
        "description": "16 MHz crystal oscillator output."
      },
      {
        "number": "25",
        "name": "XI",
        "type": "input",
        "description": "16 MHz crystal oscillator input."
      },
      {
        "number": "26",
        "name": "VDD_PA",
        "type": "power_out",
        "description": "Supply output pin that powers the internal PA, +1.8 V."
      },
      {
        "number": "27",
        "name": "RFP",
        "type": "passive",
        "description": "RF antenna interface 1, paired with RFN."
      },
      {
        "number": "28",
        "name": "RFN",
        "type": "passive",
        "description": "RF antenna interface 2, paired with RFP."
      },
      {
        "number": "29",
        "name": "VSS",
        "type": "power_in",
        "description": "Ground (0 V)."
      },
      {
        "number": "30",
        "name": "VDD",
        "type": "power_in",
        "description": "Power supply pin."
      },
      {
        "number": "31",
        "name": "IREF",
        "type": "input",
        "description": "Reference current input."
      },
      {
        "number": "32",
        "name": "NTC_ADC",
        "type": "input",
        "description": "NTC acquisition analog input."
      },
      {
        "number": "33",
        "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 says the chip bottom must be grounded, but it does not give a number for the exposed t; Table 2-1 gives no electrical type for the RF antenna pins; passive was assigned as the closest KiCa; VDD_D is listed only as 'Power' with the description 'internal power'; power_in was assigned without",
          "exposed pad 33 added from the footprint",
          "4/33 pins cited to the wrong page (name found elsewhere): ['3:XIN@p10', '4:XOUT@p10', '24:XO@p11', '25:XI@p11']"
        ],
        "pages_sent": 45,
        "cost_usd": 0.1303,
        "at": "2026-10-17T21:48:11"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588893794662567936",
        "pages": 78,
        "sha256": "bd940be63ea758c7",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 33,
        "described": 33,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "si24r2h.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4.0,
          4.0,
          0.6
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "7b482a511cdf2cf875c31931f9fea7f745b8dac2ea6203531cd6604f40a290cb",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "si24r2h-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          4.0,
          4.0,
          0.6
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "a46029f1412b54f318dcfa7485e55864a7c4f330148e3d21c68505441735e4b6",
        "checked": "2026-10-17",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}