CI523

{
  "schema_version": 1,
  "type": "component",
  "slug": "ci523",
  "title": "CI523",
  "brief": "Nanjing Zhongke Microelectronics RFID ICs, TQFN-16-EP(3x3). 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",
    "ci523",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "CI523",
    "manufacturer": "Nanjing Zhongke Microelectronics",
    "package": "TQFN-16-EP(3x3)",
    "pin_count": 17,
    "category": "RF And Wireless",
    "subcategory": "RFID ICs",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588905543088291840",
    "parts": {
      "symbol": "ci523.kicad_sym",
      "footprint": "ci523.kicad_mod",
      "model_3d": "ci523-etched.glb",
      "model_3d_plain": "ci523.glb",
      "model_3d_step": "ci523-etched.step",
      "model_3d_step_plain": "ci523.step",
      "lbr": "ci523.lbr"
    },
    "distributor_links": {
      "lcsc": "C2833202"
    },
    "pins": [
      {
        "number": "1",
        "name": "VDD1",
        "type": "power_in",
        "description": "PVDD power supply input (2.3V to 4.0V nominal); provides pin power supply to the chip"
      },
      {
        "number": "2",
        "name": "NRSTPD",
        "type": "input",
        "description": "Reset and power-down input; low level enables power-down mode (closes internal current and oscillator, disconnects input pins), rising edge triggers reset"
      },
      {
        "number": "3",
        "name": "VDD2",
        "type": "unconnected",
        "description": "Floating pin; leave unconnected (not used in QFN16 variant)"
      },
      {
        "number": "4",
        "name": "TX1",
        "type": "output",
        "description": "Transmitter 1 modulated carrier signal output for antenna driver"
      },
      {
        "number": "5",
        "name": "VDD3",
        "type": "power_in",
        "description": "TVDD transmitter power supply (2.3V to 4.0V nominal); powers output stages of TX1 and TX2"
      },
      {
        "number": "6",
        "name": "TX2",
        "type": "output",
        "description": "Transmitter 2 modulated carrier signal output for antenna driver"
      },
      {
        "number": "7",
        "name": "VDD4",
        "type": "power_in",
        "description": "AVDD analog power supply (2.3V to 4.0V nominal); provides power to analog circuit blocks"
      },
      {
        "number": "8",
        "name": "VMID",
        "type": "power_in",
        "description": "Internal reference voltage; requires bypass capacitor to ground for stability"
      },
      {
        "number": "9",
        "name": "RX",
        "type": "input",
        "description": "RF signal input from antenna tuning circuit; 13.56 MHz ISO/IEC 14443 A/B signals"
      },
      {
        "number": "10",
        "name": "OSCIN",
        "type": "input",
        "description": "Crystal oscillator inverting amplifier input or external 27.12 MHz clock input (fclk = 27.12 MHz)"
      },
      {
        "number": "11",
        "name": "OSCOUT",
        "type": "output",
        "description": "Crystal oscillator inverting amplifier output for 27.12 MHz crystal connection"
      },
      {
        "number": "12",
        "name": "MISO",
        "type": "output",
        "description": "SPI master input, slave output; data output from chip to SPI master (max 10 Mbit/s)"
      },
      {
        "number": "13",
        "name": "MOSI",
        "type": "input",
        "description": "SPI master output, slave input; data input from SPI master to chip (max 10 Mbit/s)"
      },
      {
        "number": "14",
        "name": "SCK",
        "type": "input",
        "description": "SPI serial clock input from master; max frequency 10 MHz"
      },
      {
        "number": "15",
        "name": "NSS",
        "type": "input",
        "description": "SPI chip select input (active low); must be held low during SPI transaction"
      },
      {
        "number": "16",
        "name": "IRQ",
        "type": "output",
        "description": "Interrupt request output indicating interrupt events; configurable as open-drain or CMOS push-pull via IRQPushPull bit"
      },
      {
        "number": "17",
        "name": "VSS",
        "type": "power_in",
        "description": "Chip ground connection including exposed metal pad at package bottom; primary ground reference (0V)"
      }
    ],
    "provenance": {
      "extractor": "extract_pins 0.2",
      "factory_chain": {
        "factory": "2.0.0",
        "extractor": "extract_pins 0.2",
        "primary_model": "claude-haiku-4-5-20251001",
        "primary_mode": "text",
        "consensus_model": "claude-sonnet-4-6",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: Pin 3 (VDD2) has unusual specification: labeled as type P (Power) with description '悬空' (floating/un"
        ],
        "pages_sent": 46,
        "cost_usd": 0.3019,
        "at": "2026-09-22T04:14:13"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588905543088291840",
        "pages": 46,
        "sha256": "64022a798c9b7ada",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 17,
        "described": 17,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "ci523.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          3,
          3,
          0.785
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "3eb81ffac423a66cdcfead8efe56401da171edaf1f2257049aad7b2d3900f6c8",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ci523-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          3,
          3,
          0.785
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "070713c3fc6f1cb89dfe973367daa8b3f414ef3e274d1ff80d9d4e74c237036e",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Nanjing Zhongke Microelectronics",
      "Package": "TQFN-16-EP(3x3)",
      "Category": "RF And Wireless",
      "Pins": "17"
    }
  },
  "variants": [],
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "ci523"
  ],
  "discovery_pitch": "CI523 (Nanjing Zhongke Microelectronics) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "ci523.kicad_sym",
    "ci523.kicad_mod",
    "ci523.glb",
    "ci523.step",
    "ci523.lbr",
    "docs/hero.png",
    "docs/ci523-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "updated_at": "2026-09-24T19:04:57.747Z"
}