SI4460-C2A-GMR

{
  "schema_version": 1,
  "type": "component",
  "slug": "si4460-c2a-gmr",
  "title": "SI4460-C2A-GMR",
  "brief": "SKYWORKS SILICON LABS RF Transceiver ICs, 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",
    "rf and wireless",
    "si4460-c2a-gmr",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "SI4460-C2A-GMR",
    "manufacturer": "SKYWORKS SILICON LABS",
    "package": "QFN-20-EP(4x4)",
    "pin_count": 21,
    "category": "RF And Wireless",
    "subcategory": "RF Transceiver ICs",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588895788924096512",
    "parts": {
      "symbol": "si4460-c2a-gmr.kicad_sym",
      "footprint": "si4460-c2a-gmr.kicad_mod",
      "model_3d": "si4460-c2a-gmr-hero.glb",
      "model_3d_plain": "si4460-c2a-gmr-etched.glb",
      "model_3d_step": "si4460-c2a-gmr-etched.step",
      "model_3d_step_plain": "si4460-c2a-gmr.step",
      "lbr": "si4460-c2a-gmr.lbr"
    },
    "distributor_links": {
      "lcsc": "C2151590",
      "mouser": "634-SI4460-C2A-GMR"
    },
    "distributor_check": {
      "checked_at": "2026-10-19T10:34:41Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "error"
      },
      "mouser": {
        "pn": "634-SI4460-C2A-GMR",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "SDN",
        "type": "input",
        "description": "Shutdown input (0-VDD V digital); it must be 0 in all modes except shutdown, and when it is 1 the chip is fully shut down and register contents are lost."
      },
      {
        "number": "2",
        "name": "RXp",
        "type": "input",
        "description": "Differential RF input pin of the LNA; see the application schematic for the example matching network."
      },
      {
        "number": "3",
        "name": "RXn",
        "type": "input",
        "description": "Differential RF input pin of the LNA; see the application schematic for the example matching network."
      },
      {
        "number": "4",
        "name": "TX",
        "type": "output",
        "description": "Transmit output; the PA output is open-drain, so the L-C match must supply VDD (+3.3 VDC nominal) to this pin."
      },
      {
        "number": "5",
        "name": "NC",
        "type": "unconnected",
        "description": "Not connected internally to any circuitry; the datasheet recommends connecting this pin to GND per the reference design schematic."
      },
      {
        "number": "6",
        "name": "VDD",
        "type": "power_in",
        "description": "Supply voltage input to the internal regulators, +1.8 to +3.8 V; the recommended supply voltage is +3.3 V."
      },
      {
        "number": "7",
        "name": "TXRAMP",
        "type": "output",
        "description": "Programmable bias output with ramp capability for an external FET PA; see section 5.4 Transmitter (TX)."
      },
      {
        "number": "8",
        "name": "VDD",
        "type": "power_in",
        "description": "Supply voltage input to the internal regulators, +1.8 to +3.8 V; the recommended supply voltage is +3.3 V."
      },
      {
        "number": "9",
        "name": "GPIO0",
        "type": "bidirectional",
        "description": "General-purpose digital I/O (0-VDD V) configurable through registers for functions such as microcontroller clock output, FIFO status, POR, wake-up timer, low battery detect, TRSW and antenna diversity control."
      },
      {
        "number": "10",
        "name": "GPIO1",
        "type": "bidirectional",
        "description": "General-purpose digital I/O configurable through registers for functions such as microcontroller clock output, FIFO status, POR, wake-up timer, low battery detect, TRSW and antenna diversity control."
      },
      {
        "number": "11",
        "name": "nIRQ",
        "type": "output",
        "description": "General microcontroller interrupt status output that is set low when an interrupt event occurs; no external pull-up is required but one may be desirable if multiple interrupt lines are connected."
      },
      {
        "number": "12",
        "name": "SCLK",
        "type": "input",
        "description": "Serial clock input for the 4-line serial data bus (0-VDD V digital); data is clocked into the device on positive edge transitions."
      },
      {
        "number": "13",
        "name": "SDO",
        "type": "output",
        "description": "Serial readback output (0-VDD V digital) that provides readback of the internal control registers."
      },
      {
        "number": "14",
        "name": "SDI",
        "type": "input",
        "description": "Serial data input (0-VDD V digital) providing the serial data stream for the 4-line serial data bus."
      },
      {
        "number": "15",
        "name": "nSEL",
        "type": "input",
        "description": "Serial interface select input (0-VDD V digital) providing the select/enable function for the 4-line serial data bus."
      },
      {
        "number": "16",
        "name": "XOUT",
        "type": "output",
        "description": "Crystal oscillator output; connect to an external 25 to 32 MHz crystal, or leave floating when driving the device with an external source on XIN."
      },
      {
        "number": "17",
        "name": "XIN",
        "type": "input",
        "description": "Crystal oscillator input; connect to an external 25 to 32 MHz crystal or to an external reference source."
      },
      {
        "number": "18",
        "name": "GND",
        "type": "power_in",
        "description": "Ground; when using a crystal leave floating per the reference design, and when using a TCXO connect to TCXO GND, which should be separate from the board's reference ground plane."
      },
      {
        "number": "19",
        "name": "GPIO2",
        "type": "bidirectional",
        "description": "General-purpose digital I/O configurable through registers for functions such as microcontroller clock output, FIFO status, POR, wake-up timer, low battery detect, TRSW and antenna diversity control."
      },
      {
        "number": "20",
        "name": "GPIO3",
        "type": "bidirectional",
        "description": "General-purpose digital I/O configurable through registers for functions such as microcontroller clock output, FIFO status, POR, wake-up timer, low battery detect, TRSW and antenna diversity control."
      },
      {
        "number": "21",
        "name": "PADDLE_GND",
        "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 MPN SI4460-C2A-GMR is the tape-and-reel form of Si4460-C2A-GM (ordering table note: '(R)' denote; The 4x4 mm body size is not stated explicitly in the excerpted pages. The text confirms a 20-pin QFN; The page 1 pin-map graphic is scrambled in the text extraction, so pin positions were not used. Pin ",
          "exposed pad 21 added from the footprint",
          "dropped thermal pad ['EP'] absent from footprint",
          "1/21 pins cited to the wrong page (name found elsewhere): ['17:XIN@p45']"
        ],
        "pages_sent": 12,
        "cost_usd": 0.0727,
        "at": "2026-10-19T10:34:27"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588895788924096512",
        "pages": 53,
        "sha256": "8882300b5eda9509",
        "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"
    },
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        "centre_offset_mm": 0,
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        "checked": "2026-10-19",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "si4460-c2a-gmr-etched.step",
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  },
  "metadata": {
    "specs": {
      "Manufacturer": "SKYWORKS SILICON LABS",
      "Package": "QFN-20-EP(4x4)",
      "Category": "RF And Wireless",
      "Pins": "21"
    },
    "characteristics": {
      "version": 1,
      "source": "datasheet",
      "datasheet_sha256": "8882300b5eda9509ea77fbc23f8d0ac0d1f509227b78d9faddcf4bfd5aef2376",
      "rows": [
        {
          "name": "Supply Voltage Range",
          "symbol": "VDD",
          "kind": "recommended_operating",
          "unit": "V",
          "min": 1.8,
          "typ": 3.3,
          "max": 3.8,
          "conditions": "",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "Shutdown Current",
          "symbol": "IShutdown",
          "kind": "electrical",
          "unit": "nA",
          "min": null,
          "typ": 30,
          "max": 1300,
          "conditions": "RC Oscillator, Main Digital Regulator, and Low Power Digital Regulator OFF",
          "source_page": 4,
          "source": "datasheet"
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        {
          "name": "Standby Current",
          "symbol": "IStandby",
          "kind": "electrical",
          "unit": "nA",
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          "typ": 40,
          "max": 2900,
          "conditions": "Register values maintained and RC oscillator/WUT OFF",
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        {
          "name": "Sleep Current (RC)",
          "symbol": "ISleepRC",
          "kind": "electrical",
          "unit": "nA",
          "min": null,
          "typ": 740,
          "max": 3800,
          "conditions": "RC Oscillator/WUT ON and all register values maintained, and all other blocks OFF",
          "source_page": 4,
          "source": "datasheet"
        },
        {
          "name": "RX Mode Current (High Performance Mode)",
          "symbol": "IRXH",
          "kind": "electrical",
          "unit": "mA",
          "min": null,
          "typ": 13.7,
          "max": 22,
          "conditions": "High Performance Mode (measured at 915 MHz and 40 kbps data rate)",
          "source_page": 4,
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        },
        {
          "name": "Synthesizer Frequency Range 850-1050 MHz",
          "symbol": "FSYN",
          "kind": "recommended_operating",
          "unit": "MHz",
          "min": 850,
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          "max": 1050,
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        {
          "name": "Synthesizer Frequency Range 350-525 MHz",
          "symbol": "FSYN",
          "kind": "recommended_operating",
          "unit": "MHz",
          "min": 350,
          "typ": null,
          "max": 525,
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        },
        {
          "name": "Synthesizer Frequency Range 284-350 MHz",
          "symbol": "FSYN",
          "kind": "recommended_operating",
          "unit": "MHz",
          "min": 284,
          "typ": null,
          "max": 350,
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        },
        {
          "name": "Synthesizer Frequency Range 142-175 MHz",
          "symbol": "FSYN",
          "kind": "recommended_operating",
          "unit": "MHz",
          "min": 142,
          "typ": null,
          "max": 175,
          "conditions": "",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Phase Noise 10 kHz offset",
          "symbol": "L(fM)",
          "kind": "electrical",
          "unit": "dBc/Hz",
          "min": null,
          "typ": -102,
          "max": -94,
          "conditions": "F = 10 kHz, 915 MHz, High Perf Mode",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Phase Noise 100 kHz offset",
          "symbol": "L(fM)",
          "kind": "electrical",
          "unit": "dBc/Hz",
          "min": null,
          "typ": -105,
          "max": -97,
          "conditions": "F = 100 kHz, 915 MHz, High Perf Mode",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Phase Noise 1 MHz offset",
          "symbol": "L(fM)",
          "kind": "electrical",
          "unit": "dBc/Hz",
          "min": null,
          "typ": -125,
          "max": -122,
          "conditions": "F = 1 MHz, 915 MHz, High Perf Mode",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "Phase Noise 10 MHz offset",
          "symbol": "L(fM)",
          "kind": "electrical",
          "unit": "dBc/Hz",
          "min": null,
          "typ": -138,
          "max": -135,
          "conditions": "F = 10 MHz, 915 MHz, High Perf Mode",
          "source_page": 5,
          "source": "datasheet"
        },
        {
          "name": "RX Sensitivity 915/868 MHz 0.5 kbps (PRX_40 row, 40 kbps)",
          "symbol": "PRX_40",
          "kind": "electrical",
          "unit": "dBm",
          "min": null,
          "typ": -109,
          "max": -107,
          "conditions": "BER < 0.1%, 40 kbps, GFSK, BT = 0.5, f= 20 kHz",
          "source_page": 7,
          "source": "datasheet"
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        {
          "name": "RX Sensitivity 915/868 MHz (PRX_100)",
          "symbol": "PRX_100",
          "kind": "electrical",
          "unit": "dBm",
          "min": null,
          "typ": -104,
          "max": -102,
          "conditions": "BER < 0.1%, 100 kbps, GFSK, BT = 0.5, f= 50 kHz",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "RX Sensitivity 915/868 MHz (PRX_500)",
          "symbol": "PRX_500",
          "kind": "electrical",
          "unit": "dBm",
          "min": null,
          "typ": -97,
          "max": -92,
          "conditions": "BER < 0.1%, 500 kbps, GFSK, BT = 0.5, f= 250 kHz",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "RX Sensitivity 915/868 MHz OOK 4.8 kbps",
          "symbol": "PRX_OOK",
          "kind": "electrical",
          "unit": "dBm",
          "min": null,
          "typ": -108,
          "max": -104,
          "conditions": "BER < 0.1%, 4.8 kbps, 350 kHz BW, OOK, PN15 data",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "RX Sensitivity 915/868 MHz OOK 40 kbps",
          "symbol": "PRX_OOK",
          "kind": "electrical",
          "unit": "dBm",
          "min": null,
          "typ": -101,
          "max": -97,
          "conditions": "BER < 0.1%, 40 kbps, 350 kHz BW, OOK, PN15 data",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "RX Sensitivity 915/868 MHz OOK 120 kbps",
          "symbol": "PRX_OOK",
          "kind": "electrical",
          "unit": "dBm",
          "min": null,
          "typ": -96,
          "max": -91,
          "conditions": "BER < 0.1%, 120 kbps, 350 kHz BW, OOK, PN15 data",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "RX Channel Bandwidth",
          "symbol": "BW",
          "kind": "electrical",
          "unit": "kHz",
          "min": 1.1,
          "typ": null,
          "max": 850,
          "conditions": "",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "1-Ch Offset Selectivity 868/915 MHz",
          "symbol": "C/I1-CH",
          "kind": "electrical",
          "unit": "dB",
          "min": null,
          "typ": -55,
          "max": -45,
          "conditions": "Desired ref signal 3 dB above sensitivity, BER < 0.1%; interferer CW; desired 2.4 kbps F = 1.2 kHz GFSK BT = 0.5; RX channel BW = 4.8 kHz; channel spacing = 12.5 kHz",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Blocking 1 MHz Offset",
          "symbol": "1MBLOCK",
          "kind": "electrical",
          "unit": "dB",
          "min": null,
          "typ": -79,
          "max": -68,
          "conditions": "Desired ref signal 3 dB above sensitivity, BER = 0.1%; interferer CW; desired 2.4 kbps F = 1.2 kHz GFSK BT = 0.5; RX channel BW = 4.8 kHz",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Blocking 8 MHz Offset",
          "symbol": "8MBLOCK",
          "kind": "electrical",
          "unit": "dB",
          "min": null,
          "typ": -86,
          "max": -75,
          "conditions": "",
          "source_page": 7,
          "source": "datasheet"
        },
        {
          "name": "Image Rejection (no calibration) 915 MHz",
          "symbol": "ImREJ",
          "kind": "electrical",
          "unit": "dB",
          "min": 30,
          "typ": 45,
          "max": null,
          "conditions": "No image rejection calibration; rejection at image frequency; RF = 915 MHz; IF = 468.75 kHz",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "Image Rejection (with calibration) 915 MHz",
          "symbol": "ImREJ",
          "kind": "electrical",
          "unit": "dB",
          "min": 40,
          "typ": 52,
          "max": null,
          "conditions": "With image rejection calibration in Si446x; rejection at image frequency; RF = 915 MHz; IF = 468.75 kHz",
          "source_page": 8,
          "source": "datasheet"
        },
        {
          "name": "(G)FSK Data Rate",
          "symbol": "DRFSK",
          "kind": "electrical",
          "unit": "kbps",
          "min": 0.1,
          "typ": null,
          "max": 500,
          "conditions": "",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "4(G)FSK Data Rate",
          "symbol": "DR4FSK",
          "kind": "electrical",
          "unit": "kbps",
          "min": 0.2,
          "typ": null,
          "max": 1000,
          "conditions": "",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "OOK Data Rate",
          "symbol": "DROOK",
          "kind": "electrical",
          "unit": "kbps",
          "min": 0.1,
          "typ": null,
          "max": 120,
          "conditions": "",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Output Power Range (Si4460)",
          "symbol": "PTX60",
          "kind": "recommended_operating",
          "unit": "dBm",
          "min": -20,
          "typ": null,
          "max": 12.5,
          "conditions": "Typical range at 3.3 V with Class E match optimized for best PA efficiency",
          "source_page": 9,
          "source": "datasheet"
        },
        {
          "name": "Output Power Variation (Si4460) 915 MHz",
          "symbol": "",
          "kind": "electrical",
          "unit": "dBm",
          "min": 9,
          "typ": 10,
          "max": 11,
          "conditions": "At 10 dBm PA power setting, 915 MHz, Class E match, 3.3 V, 25 °C",
          "source_page": 10,
          "source": "datasheet"
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        {
          "name": "Output Power Variation (Si4460) 169 MHz",
          "symbol": "",
          "kind": "electrical",
          "unit": "dBm",
          "min": 9.5,
          "typ": 10,
          "max": 10.5,
          "conditions": "At 10 dBm PA power setting, 169 MHz, Square Wave match, 3.3 V, 25 °C",
          "source_page": 10,
          "source": "datasheet"
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        {
          "name": "TX RF Output Steps",
          "symbol": "PRF_OUT",
          "kind": "electrical",
          "unit": "dB",
          "min": null,
          "typ": 0.25,
          "max": 0.4,
          "conditions": "Using switched current match within 6 dB of max power using CLE match within 6 dB of max power",
          "source_page": 10,
          "source": "datasheet"
        },
        {
          "name": "TX RF Output Level Variation vs Temperature",
          "symbol": "PRF_TEMP",
          "kind": "electrical",
          "unit": "dB",
          "min": null,
          "typ": 2.3,
          "max": 3,
          "conditions": "-40 to +85 C",
          "source_page": 10,
          "source": "datasheet"
        },
        {
          "name": "TX RF Output Level Variation vs Frequency",
          "symbol": "PRF_FREQ",
          "kind": "electrical",
          "unit": "dB",
          "min": null,
          "typ": 0.6,
          "max": 1.7,
          "conditions": "Measured across 902-928 MHz",
          "source_page": 10,
          "source": "datasheet"
        },
        {
          "name": "Microcontroller Clock Output Frequency Range (lower limit)",
          "symbol": "FMC",
          "kind": "electrical",
          "unit": "kHz",
          "min": 32.768,
          "typ": null,
          "max": null,
          "conditions": "Configurable to Fxtal or Fxtal divided by 2, 3, 7.5, 10, 15, or 30; 32.768 kHz also supported",
          "source_page": 11,
          "source": "datasheet"
        },
        {
          "name": "XTAL Range",
          "symbol": "XTALRange",
          "kind": "recommended_operating",
          "unit": "MHz",
          "min": 25,
          "typ": null,
          "max": 32,
          "conditions": "Tested using external clock source (similar to TCXO)",
          "source_page": 11,
          "source": "datasheet"
        },
        {
          "name": "POR Reset Time",
          "symbol": "tPOR",
          "kind": "timing",
          "unit": "ms",
          "min": null,
          "typ": null,
          "max": 6,
          "conditions": "",
          "source_page": 11,
          "source": "datasheet"
        },
        {
          "name": "Input Current",
          "symbol": "IIN",
          "kind": "electrical",
          "unit": "µA",
          "min": -1,
          "typ": null,
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