SI4825-A10-CSR

{
  "slug": "si4825-a10-csr",
  "version": "0.1.0",
  "type": "component",
  "description": "SKYWORKS SILICON LABS RF Transceiver ICs, SOIC-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "rf and wireless",
    "si4825-a10-csr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "si4825-a10-csr.kicad_sym",
    "si4825-a10-csr.kicad_mod",
    "si4825-a10-csr.glb",
    "si4825-a10-csr.step",
    "si4825-a10-csr.lbr",
    "docs/hero.png",
    "docs/si4825-a10-csr-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "si4825-a10-csr-hero.glb",
    "si4825-a10-csr-hero.overlay.json",
    "si4825-a10-csr-etched.glb"
  ],
  "component": {
    "mpn": "SI4825-A10-CSR",
    "manufacturer": "SKYWORKS SILICON LABS",
    "package": "SOIC-16",
    "pin_count": 16,
    "category": "RF And Wireless",
    "subcategory": "RF Transceiver ICs",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588942424739885056",
    "parts": {
      "symbol": "si4825-a10-csr.kicad_sym",
      "footprint": "si4825-a10-csr.kicad_mod",
      "model_3d": "si4825-a10-csr-hero.glb",
      "model_3d_plain": "si4825-a10-csr-etched.glb",
      "model_3d_step": "si4825-a10-csr-etched.step",
      "model_3d_step_plain": "si4825-a10-csr.step",
      "lbr": "si4825-a10-csr.lbr"
    },
    "distributor_links": {
      "lcsc": "C2654605",
      "digikey": "336-4481-2-ND",
      "mouser": "634-SI4825-A10-CSR"
    },
    "distributor_check": {
      "checked_at": "2026-10-19T05:53:48Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "336-4481-2-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "634-SI4825-A10-CSR",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "LNA_EN",
        "type": "output",
        "description": "Enables an external SW LNA (the datasheet gives no voltage or current limits for this pin)."
      },
      {
        "number": "2",
        "name": "TUNE1",
        "type": "passive",
        "description": "Frequency tuning input; a valid channel is found by tuning the potentiometer connected to TUNE1 and TUNE2 (potentiometer value 100 kΩ in the typical BOM)."
      },
      {
        "number": "3",
        "name": "TUNE2",
        "type": "passive",
        "description": "Frequency tuning input; used together with TUNE1 for the tuning potentiometer, with absolute maximum input current of 10 mA."
      },
      {
        "number": "4",
        "name": "BAND",
        "type": "input",
        "description": "Selects the band and the de-emphasis time constant; absolute maximum input current is 10 mA."
      },
      {
        "number": "5",
        "name": "NC",
        "type": "unconnected",
        "description": "No connect; leave floating."
      },
      {
        "number": "6",
        "name": "FMI",
        "type": "input",
        "description": "FM RF input, connected to the FM antenna trace; the RF input level is limited to 0.4 VPK (absolute maximum)."
      },
      {
        "number": "7",
        "name": "RFGND",
        "type": "power_in",
        "description": "RF ground; connect to the PCB ground plane."
      },
      {
        "number": "8",
        "name": "AMI",
        "type": "input",
        "description": "AM RF input, connected to the AM antenna; the RF input level is limited to 0.4 VPK (absolute maximum)."
      },
      {
        "number": "9",
        "name": "RST",
        "type": "input",
        "description": "Active-low device reset input; RSTB must be held low at least 100 µs after the supply ramps up and asserted before VDD ramps down."
      },
      {
        "number": "10",
        "name": "VOL+",
        "type": "input",
        "description": "Volume button up input for direct digital volume control; absolute maximum input current is 10 mA."
      },
      {
        "number": "11",
        "name": "VOL-",
        "type": "input",
        "description": "Volume button down input for direct digital volume control; absolute maximum input current is 10 mA."
      },
      {
        "number": "12",
        "name": "XTALO",
        "type": "output",
        "description": "Crystal oscillator output for a 32.768 kHz crystal (crystal frequency tolerance ±100 ppm)."
      },
      {
        "number": "13",
        "name": "XTALI",
        "type": "input",
        "description": "Crystal oscillator input or external reference clock input, supporting 32.768 kHz with ±100 ppm tolerance; absolute maximum input current is 10 mA."
      },
      {
        "number": "14",
        "name": "VDD",
        "type": "power_in",
        "description": "Supply voltage of 2.0 to 3.6 V (recommended 2 to 3.6 V, absolute maximum -0.5 to 5.8 V); may be connected directly to battery."
      },
      {
        "number": "15",
        "name": "GND",
        "type": "power_in",
        "description": "Ground; connect to the PCB ground plane."
      },
      {
        "number": "16",
        "name": "AOUT",
        "type": "output",
        "description": "Audio output; load resistance at least 10 kΩ and load capacitance at most 50 pF (single-ended)."
      }
    ],
    "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: Requested MPN 'SI4825-A10-CSR' does not appear verbatim. The ordering guide lists Si4825-A10-CS (16L; The datasheet does not state pin electrical direction. Types were inferred from the functional descr; The datasheet gives no voltage or current limits for LNA_EN, TUNE1, TUNE2, BAND, VOL+, VOL-, or AOUT"
        ],
        "pages_sent": 21,
        "cost_usd": 0.0708,
        "at": "2026-10-19T05:53:26"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588942424739885056",
        "pages": 21,
        "sha256": "347ac3cf16abb9e3",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 16,
        "described": 16,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
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      "footprint": "viewers/footprint.html"
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        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "d5eeddb4c0b304dc61950919b126fc61d7586abd5f16ab71a2a79759ec6498bf",
        "checked": "2026-10-19",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "si4825-a10-csr-etched.step",
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        "extents_mm": [
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        "sha256": "36dbba90943a3dd2a2f4453a93c4b5336007d722cb8ffe71c3ec9060207dc793",
        "checked": "2026-10-19",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
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  }
}