MS520

{
  "slug": "ms520",
  "version": "0.1.0",
  "type": "component",
  "description": "Hangzhou Ruimeng Tech RFID ICs, VQFN-32-EP(5x5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "rf and wireless",
    "ms520",
    "factory-2.0.0",
    "extractor-text"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "ms520.kicad_sym",
    "ms520.kicad_mod",
    "ms520.glb",
    "ms520.step",
    "ms520.lbr",
    "docs/hero.png",
    "docs/ms520-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "ms520-hero.glb",
    "ms520-hero.overlay.json",
    "ms520-etched.glb"
  ],
  "component": {
    "mpn": "MS520",
    "manufacturer": "Hangzhou Ruimeng Tech",
    "package": "VQFN-32-EP(5x5)",
    "pin_count": 33,
    "category": "RF And Wireless",
    "subcategory": "RFID ICs",
    "datasheet": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588881930511396864",
    "parts": {
      "symbol": "ms520.kicad_sym",
      "footprint": "ms520.kicad_mod",
      "model_3d": "ms520-hero.glb",
      "model_3d_plain": "ms520-etched.glb",
      "model_3d_step": "ms520-etched.step",
      "model_3d_step_plain": "ms520.step",
      "lbr": "ms520.lbr"
    },
    "distributor_links": {
      "lcsc": "C190879"
    },
    "distributor_check": {
      "checked_at": "2026-10-18T02:51:41Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "N.C.",
        "type": "unconnected",
        "description": "Not connected (datasheet pin type I, marked not connected)."
      },
      {
        "number": "2",
        "name": "PVDD",
        "type": "power_in",
        "description": "Pin supply; VDD(PVDD) is specified at 1.6 V to 3.6 V (1.8 V typical) and must be equal to or lower than VDDD."
      },
      {
        "number": "3",
        "name": "DVDD",
        "type": "power_in",
        "description": "Digital supply; VDDD is specified at 2.5 V to 3.6 V (3.3 V typical) and must equal VDDA and VDD(TVDD)."
      },
      {
        "number": "4",
        "name": "DVSS",
        "type": "power_in",
        "description": "Digital ground; the exposed die pad under the package is optional and may be connected to this pin."
      },
      {
        "number": "5",
        "name": "PVSS",
        "type": "power_in",
        "description": "Pin supply ground."
      },
      {
        "number": "6",
        "name": "NRSTPD",
        "type": "input",
        "description": "Reset and power-down input: low level enables hard power-down (cuts internal current, stops the oscillator and disconnects input pins), and a rising edge enables reset."
      },
      {
        "number": "7",
        "name": "TIN",
        "type": "input",
        "description": "Test signal input, also used as the active-antenna receive input when TIN/TOUT interface is used; must be tied to SVDD or PVSS when unused."
      },
      {
        "number": "8",
        "name": "TOUT",
        "type": "output",
        "description": "Test signal output, used for test and for driving an active antenna circuit via the TOUT interface."
      },
      {
        "number": "9",
        "name": "SVDD",
        "type": "power_in",
        "description": "Supply for the TIN and TOUT pins; specified at 1.6 V to 3.6 V and must be connected to DVDD, PVDD or another supply pin when unused."
      },
      {
        "number": "10",
        "name": "TVSS",
        "type": "power_in",
        "description": "Ground of the TX1 transmitter output stage."
      },
      {
        "number": "11",
        "name": "TX1",
        "type": "output",
        "description": "Transmitter 1 output delivering the 13.56 MHz energy carrier modulated by the transmit envelope; drives the antenna through passive matching and filtering."
      },
      {
        "number": "12",
        "name": "TVDD",
        "type": "power_in",
        "description": "Transmitter supply powering the TX1 and TX2 output stages; specified at 2.5 V to 3.6 V."
      },
      {
        "number": "13",
        "name": "TX2",
        "type": "output",
        "description": "Transmitter 2 output delivering the 13.56 MHz energy carrier modulated by the transmit envelope."
      },
      {
        "number": "14",
        "name": "TVSS",
        "type": "power_in",
        "description": "Ground of the TX2 transmitter output stage."
      },
      {
        "number": "15",
        "name": "AVDD",
        "type": "power_in",
        "description": "Analog supply; VDDA is specified at 2.5 V to 3.6 V (3.3 V typical) and must equal VDDD and VDD(TVDD)."
      },
      {
        "number": "16",
        "name": "VMID",
        "type": "passive",
        "description": "Internal reference voltage node (datasheet type P); no electrical limit is stated for it in the text."
      },
      {
        "number": "17",
        "name": "RX",
        "type": "input",
        "description": "RF signal input; the pin voltage is clamped by internal diodes to AVSS and AVDD, with input voltage range -1 V to VDDA +1 V."
      },
      {
        "number": "18",
        "name": "AVSS",
        "type": "power_in",
        "description": "Analog ground."
      },
      {
        "number": "19",
        "name": "AUX1",
        "type": "output",
        "description": "Auxiliary output for test signals; DAC outputs are current sources, so a 510 Ω pull-down resistor is recommended."
      },
      {
        "number": "20",
        "name": "AUX2",
        "type": "output",
        "description": "Auxiliary output for test signals; DAC outputs are current sources, so a 510 Ω pull-down resistor is recommended."
      },
      {
        "number": "21",
        "name": "OSCIN",
        "type": "input",
        "description": "Inverting input of the crystal oscillator amplifier, also the input for an external clock (27.12 MHz, 40-60 % duty cycle)."
      },
      {
        "number": "22",
        "name": "OSCOUT",
        "type": "output",
        "description": "Inverting output of the crystal oscillator amplifier for a 27.12 MHz crystal."
      },
      {
        "number": "23",
        "name": "IRQ",
        "type": "output",
        "description": "Interrupt request output indicating an interrupt event; can be configured as push-pull or open-drain."
      },
      {
        "number": "24",
        "name": "NSS",
        "type": "input",
        "description": "SPI slave select input."
      },
      {
        "number": "25",
        "name": "D1",
        "type": "bidirectional",
        "description": "Test port D1 (I/O), usable only as an output when the test pin output driver is enabled; limited to D1-D4 when SPI is used."
      },
      {
        "number": "26",
        "name": "D2",
        "type": "bidirectional",
        "description": "Test port D2 (I/O)."
      },
      {
        "number": "27",
        "name": "D3",
        "type": "bidirectional",
        "description": "Test port D3 (I/O)."
      },
      {
        "number": "28",
        "name": "D4",
        "type": "bidirectional",
        "description": "Test port D4 (I/O)."
      },
      {
        "number": "29",
        "name": "SCK",
        "type": "bidirectional",
        "description": "Multiplexed pin: test port D5 (I/O) and SPI serial clock input SCK, which must be generated by the host."
      },
      {
        "number": "30",
        "name": "MOSI",
        "type": "bidirectional",
        "description": "Multiplexed pin: test port D6 (I/O) and SPI master-out/slave-in MOSI (I/O)."
      },
      {
        "number": "31",
        "name": "MISO",
        "type": "bidirectional",
        "description": "Multiplexed pin: test port D7 (I/O) and SPI master-in/slave-out MISO (I/O)."
      },
      {
        "number": "32",
        "name": "N.C.",
        "type": "unconnected",
        "description": "Not connected (datasheet pin type I, marked not connected)."
      },
      {
        "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 requested package 'VQFN-32-EP(5x5)' is not named in the text. The datasheet's product table list; The exposed thermal pad under the package is mentioned (footnote [3], optional connection to DVSS) b; Pin 29, 30 and 31 are multiplexed in the datasheet (D5/SCK, D6/MOSI, D7/MISO). They are listed once ",
          "exposed pad 33 added from the footprint"
        ],
        "pages_sent": 53,
        "cost_usd": 0.2162,
        "at": "2026-10-18T02:49:45"
      },
      "datasheet": {
        "url": "https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588881930511396864",
        "pages": 62,
        "sha256": "7870c75ac44eea56",
        "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": "ms520.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          5.0,
          5.0,
          0.875
        ],
        "zmin_mm": 0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "5fa713ea46b36980895812ed853577889b7cb06d275041a39b99bc0be305dc79",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ms520-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": "5e263033dedcb92aedd3d21c233b76d786617ff30f7e09feb74a8ea7393ef723",
        "checked": "2026-10-18",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}