Si3933

{
  "slug": "si3933",
  "version": "0.1.0",
  "type": "component",
  "description": "Nanjing Zhongke Microelectronics RF Transceiver ICs, TSSOP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "rf and wireless",
    "si3933",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "si3933.kicad_sym",
    "si3933.kicad_mod",
    "si3933.glb",
    "si3933.step",
    "si3933.lbr",
    "docs/hero.png",
    "docs/si3933-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "si3933-hero.glb",
    "si3933-hero.overlay.json",
    "si3933-etched.glb"
  ],
  "component": {
    "mpn": "Si3933",
    "manufacturer": "Nanjing Zhongke Microelectronics",
    "package": "TSSOP-16",
    "pin_count": 16,
    "category": "RF And Wireless",
    "subcategory": "RF Transceiver ICs",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588947798947061760",
    "parts": {
      "symbol": "si3933.kicad_sym",
      "footprint": "si3933.kicad_mod",
      "model_3d": "si3933-hero.glb",
      "model_3d_plain": "si3933-etched.glb",
      "model_3d_step": "si3933-etched.step",
      "model_3d_step_plain": "si3933.step",
      "lbr": "si3933.lbr"
    },
    "distributor_links": {
      "lcsc": "C2916912"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T20:37:18Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "quota"
      },
      "mouser": {
        "pn": null,
        "status": "quota"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "CS",
        "type": "input",
        "description": "SPI chip-select digital input; SPI commands are programmed only while CS is held high, and SDO is tri-stated when CS is low."
      },
      {
        "number": "2",
        "name": "SCL",
        "type": "input",
        "description": "SPI interface clock input for the 4-wire SPI, with a maximum operating frequency of 6 MHz and data sampled on the falling edge of SCLK."
      },
      {
        "number": "3",
        "name": "SDI",
        "type": "input",
        "description": "SPI serial data input carrying the register write data, transmitted data and/or readable register address, sent MSB first."
      },
      {
        "number": "4",
        "name": "SDO",
        "type": "tri_state",
        "description": "SPI serial data output carrying received data or the read value of the selected register; it is tri-stated when CS is low so that several devices can share the SDO bus."
      },
      {
        "number": "5",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply pin, specified at 2.4 V to 3.6 V (3 V typical) with an absolute maximum of 5 V, and decoupled with a battery capacitor CBAT (10 uF typical in the 125 kHz application)."
      },
      {
        "number": "6",
        "name": "GND",
        "type": "power_in",
        "description": "Negative supply pin, the 0 V reference of the supply voltage."
      },
      {
        "number": "7",
        "name": "LF3P",
        "type": "bidirectional",
        "description": "Analog I/O for the LC resonator and input of antenna channel 3, with internal parallel tuning capacitance adjustable from 0 to 31 pF in 1 pF steps."
      },
      {
        "number": "8",
        "name": "LF2P",
        "type": "bidirectional",
        "description": "Analog I/O for the LC resonator and input of antenna channel 2, with internal parallel tuning capacitance adjustable from 0 to 31 pF in 1 pF steps."
      },
      {
        "number": "9",
        "name": "LF1P",
        "type": "bidirectional",
        "description": "Analog I/O for the LC resonator and input of antenna channel 1, with internal parallel tuning capacitance adjustable from 0 to 31 pF in 1 pF steps; its resonator is also used for the self-calibration of the RC oscillator."
      },
      {
        "number": "10",
        "name": "LFN",
        "type": "bidirectional",
        "description": "Analog I/O serving as the common ground for antennas 1, 2 and 3."
      },
      {
        "number": "11",
        "name": "XIN",
        "type": "bidirectional",
        "description": "Analog I/O crystal oscillator input; it must be connected to VCC when the internal RC oscillator or an external clock is used."
      },
      {
        "number": "12",
        "name": "XOUT",
        "type": "bidirectional",
        "description": "Analog I/O crystal oscillator output for a 32.768 kHz crystal (25 to 45 kHz range); it is left floating for the internal RC oscillator and driven by the external clock source (25 to 45 kHz) when that option is used."
      },
      {
        "number": "13",
        "name": "VSS",
        "type": "power_in",
        "description": "Substrate power pad tied to the negative supply, 0 V."
      },
      {
        "number": "14",
        "name": "WAKE",
        "type": "output",
        "description": "Digital wake-up output (IRQ) that goes high on a valid wake-up; in manual wake-up mode it produces a 128 us interrupt pulse."
      },
      {
        "number": "15",
        "name": "DAT",
        "type": "output",
        "description": "Digital data output carrying the demodulated signal (or decoded Manchester data when enabled), and showing the LC resonance frequency when LC_OSC_MUX is selected for tuning."
      },
      {
        "number": "16",
        "name": "CL_DAT",
        "type": "output",
        "description": "Digital output carrying the Manchester-recovered clock, on whose rising edge DAT data is stable; it can also show the clock-generator frequency when DISPLAY_CLK is set."
      }
    ],
    "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 labels these as 'analog I/O' without an ERC direction; they are mapped to bidirectiona; VSS is described as a 'substrate power pad' and LFN as a common antenna ground; they are typed power; SDO is listed as 'digital output / tri-state' and is mapped to tri_state.",
          "2/16 pins cited to the wrong page (name found elsewhere): ['11:XIN@p8', '12:XOUT@p9']"
        ],
        "pages_sent": 48,
        "cost_usd": 0.1305,
        "at": "2026-10-18T20:35:05"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588947798947061760",
        "pages": 48,
        "sha256": "c53116e9b1556a1a",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 16,
        "described": 16,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
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        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.4,
          5.0,
          1.1
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "6ad5e98224d02a427d9a6b929a28dbc158b9925fba5adec12db05079f1016948",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "si3933-etched.step",
        "role": "eda",
        "up": "Z",
        "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": "407c5b97d9d442013700e69eabe03e1a9564178d12660f7ae89eddb32fe2a739",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}