AT88RF1354-ZU

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  "slug": "at88rf1354-zu",
  "title": "AT88RF1354-ZU",
  "brief": "Microchip Tech Pre-ordered MCUs, QFN-36-EP(6x6). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
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    "embedded processors & controllers",
    "at88rf1354-zu",
    "factory-2.0.0",
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  "component": {
    "mpn": "AT88RF1354-ZU",
    "manufacturer": "Microchip Tech",
    "package": "QFN-36-EP(6x6)",
    "pin_count": 37,
    "category": "Embedded Processors & Controllers",
    "subcategory": "Pre-ordered MCUs",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/f91ccc8a37365085c887054245f74542.pdf",
    "parts": {
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      "lbr": "at88rf1354-zu.lbr"
    },
    "distributor_links": {
      "lcsc": "C614319",
      "digikey": "AT88RF1354-ZU-ND",
      "mouser": "556-AT88RF1354-ZU"
    },
    "distributor_check": {
      "checked_at": "2026-10-31T12:38:17Z",
      "source": "Component Ocean /api/assign-pns",
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        "pn": "AT88RF1354-ZU-ND",
        "status": "found",
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        "pn": "556-AT88RF1354-ZU",
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    },
    "pins": [
      {
        "number": "1",
        "name": "VCC_ANT",
        "type": "power_in",
        "description": "Antenna supply voltage powering the transmitter and antenna drive circuits; requires 15 nF (within 3 mm) and 2.2 uF (within 5 mm) bypass capacitors to VSS_ANT."
      },
      {
        "number": "2",
        "name": "VSS_ANT",
        "type": "power_in",
        "description": "Antenna ground, high current return path for transmitter and antenna drive circuit; connect to VSS at only a single point."
      },
      {
        "number": "3",
        "name": "ANT",
        "type": "output",
        "description": "Antenna driver output generating the 13.56 MHz carrier, shaped into a sine wave by external passive circuitry."
      },
      {
        "number": "4",
        "name": "Xtal1",
        "type": "passive",
        "description": "Crystal pin 1; a 13.56 MHz crystal is connected between Xtal1 and Xtal2."
      },
      {
        "number": "5",
        "name": "Xtal2",
        "type": "passive",
        "description": "Crystal pin 2; a 13.56 MHz crystal is connected between Xtal1 and Xtal2."
      },
      {
        "number": "6",
        "name": "C5",
        "type": "passive",
        "description": "Bypass capacitor pin requiring 0.33 uF to VSS for the digital circuits, placed within 3 mm of the package."
      },
      {
        "number": "7",
        "name": "Test1",
        "type": "input",
        "description": "Test input pin 1; must be connected to VSS on the board to prevent the IC from entering test mode."
      },
      {
        "number": "8",
        "name": "CLKO",
        "type": "output",
        "description": "Programmable clock output from the PLL (default 1.978 MHz; 1.978/3.955/7.910/15.82 MHz options), disabled via the ENB bit of the PLL register if unused."
      },
      {
        "number": "9",
        "name": "ResetB",
        "type": "input",
        "description": "Active-low reset input; must be pulled high by the host microcontroller and/or an external resistor to VCC when in use."
      },
      {
        "number": "10",
        "name": "ISEL",
        "type": "input",
        "description": "Interface select input; low selects TWI, high selects SPI mode 0."
      },
      {
        "number": "11",
        "name": "TestD",
        "type": "unconnected",
        "description": "Test output pin D; must be left open by the user."
      },
      {
        "number": "12",
        "name": "Istat",
        "type": "output",
        "description": "Serial interface handshaking output; high indicates a byte is ready to read, and the device will not accept commands while it is high."
      },
      {
        "number": "13",
        "name": "SSB",
        "type": "input",
        "description": "SPI slave select (active low) input; in TWI mode not used and connected to VSS."
      },
      {
        "number": "14",
        "name": "SCK",
        "type": "input",
        "description": "Serial clock input for both SPI and TWI modes."
      },
      {
        "number": "15",
        "name": "SDI",
        "type": "bidirectional",
        "description": "SPI serial data input, or TWI serial data input/output in TWI mode."
      },
      {
        "number": "16",
        "name": "Test2",
        "type": "input",
        "description": "Test input pin 2; must be connected to VSS on the board to prevent the IC from entering test mode."
      },
      {
        "number": "17",
        "name": "Test3",
        "type": "input",
        "description": "Test input pin 3; must be connected to VSS on the board to prevent the IC from entering test mode."
      },
      {
        "number": "18",
        "name": "N.C.",
        "type": "unconnected",
        "description": "Not used; can be left open."
      },
      {
        "number": "19",
        "name": "SDO",
        "type": "output",
        "description": "SPI serial data output; not used in TWI mode."
      },
      {
        "number": "20",
        "name": "ADDR",
        "type": "input",
        "description": "TWI device address select input (VSS gives $50/$51, VCC gives $D4/$D5); connect to VSS in SPI mode."
      },
      {
        "number": "21",
        "name": "C1",
        "type": "passive",
        "description": "Bypass capacitor pin requiring 0.33 uF to VSS for the digital circuits, placed within 3 mm of the package."
      },
      {
        "number": "22",
        "name": "VSS",
        "type": "power_in",
        "description": "Digital ground for I/O buffers and digital circuits; keep separated from VSSA and VSS_ANT planes by a minimum of 20 mils."
      },
      {
        "number": "23",
        "name": "VSSA",
        "type": "power_in",
        "description": "Analog ground; connect to VSS at only a single point within 1 cm of pins 22 and 23, not directly to VSS_ANT."
      },
      {
        "number": "24",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply for I/O buffers, digital and analog circuits (3.0 to 3.6 V or 4.5 to 5.5 V), matching the microcontroller I/O voltage; requires 15 nF and 2.2 uF bypass capacitors."
      },
      {
        "number": "25",
        "name": "C4",
        "type": "passive",
        "description": "Bypass capacitor pin requiring 0.33 uF to VSSA for the analog circuits, placed within 3 mm of the package."
      },
      {
        "number": "26",
        "name": "C2",
        "type": "passive",
        "description": "Bypass capacitor pin requiring 47 nF to VSSA for the analog circuits, placed within 3 mm of the package."
      },
      {
        "number": "27",
        "name": "C3",
        "type": "passive",
        "description": "Bypass capacitor pin requiring 47 nF to VSSA for the analog circuits, placed within 3 mm of the package."
      },
      {
        "number": "28",
        "name": "N.C.",
        "type": "unconnected",
        "description": "Not used; can be left open."
      },
      {
        "number": "29",
        "name": "C7",
        "type": "passive",
        "description": "Bypass capacitor pin requiring 47 nF to VSSA for the analog circuits, placed within 3 mm of the package."
      },
      {
        "number": "30",
        "name": "N.C.",
        "type": "unconnected",
        "description": "Not used; can be left open."
      },
      {
        "number": "31",
        "name": "TestR",
        "type": "unconnected",
        "description": "Test output pin R (analog out); must be left open by the user."
      },
      {
        "number": "32",
        "name": "RFin",
        "type": "input",
        "description": "RF receiver input; a resistor/capacitor filter limits the peak-to-peak voltage on this pin to a safe level."
      },
      {
        "number": "33",
        "name": "N.C.",
        "type": "unconnected",
        "description": "Not used; can be left open."
      },
      {
        "number": "34",
        "name": "Rmod",
        "type": "passive",
        "description": "Analog test pin that must be connected to VSS_ANT on the board."
      },
      {
        "number": "35",
        "name": "C6",
        "type": "passive",
        "description": "Antenna bypass capacitor pin that provides power to the antenna circuits and modulates the power level for communications."
      },
      {
        "number": "36",
        "name": "N.C.",
        "type": "unconnected",
        "description": "Not used; can be left open."
      },
      {
        "number": "37",
        "name": "EP",
        "type": "passive",
        "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
      }
    ],
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          "extractor flagged: Pin types for Xtal1/Xtal2, C1-C7 and Rmod are not explicit KiCad classes in the datasheet; I chose p; ANT type is not printed in the table; output was inferred from 'Antenna Driver Output'. TestD (I/O i; The exposed pad has no pin number in the datasheet; 'EP' is used as the identifier.",
          "2/37 pins cited to the wrong page (name found elsewhere): ['4:Xtal1@p13', '5:Xtal2@p13']"
        ],
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        "at": "2026-10-31T12:37:59"
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        "pages": 48,
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      "Package": "QFN-36-EP(6x6)",
      "Category": "Embedded Processors & Controllers",
      "Pins": "37"
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        "quote": "and thermal pad region, type of vias, board thickness, copper thickness, lead finish on the package, surface finish on",
        "page": 33,
        "doc": "ds.pdf",
        "material": "copper"
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          "name": "Supply voltage VCC (5 V digital interface)",
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          "source_page": 16,
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          "unit": "V",
          "min": 4.5,
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          "name": "Operating temperature (case)",
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          "name": "Operating temperature (case)",
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          "unit": "°C",
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        {
          "name": "Storage temperature (case)",
          "symbol": "",
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          "unit": "°C",
          "min": -65,
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        {
          "name": "Power dissipation",
          "symbol": "",
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          "unit": "W",
          "min": null,
          "typ": null,
          "max": 2,
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        {
          "name": "Maximum operating voltage VCC",
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          "min": null,
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        {
          "name": "Maximum operating voltage VCC_ANT",
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        {
          "name": "DC current VCC pin",
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          "unit": "mA",
          "min": null,
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        {
          "name": "HBM ESD",
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        {
          "name": "Output low voltage (SDI pin, TWI mode only)",
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          "min": 0,
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          "conditions": "VCC = max, IOL = 3 mA",
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        {
          "name": "SDA pull-up resistor, VCC 3.0-3.6 V, 100 kHz",
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          "name": "SDA pull-up resistor, VCC 4.5-5.5 V, 100 kHz",
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        {
          "name": "SDA pull-up resistor, VCC 4.5-5.5 V, 1 MHz",
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          "name": "Minimum pulse width on ResetB pin",
          "symbol": "tRST",
          "kind": "timing",
          "unit": "uS",
          "min": 500,
          "typ": null,
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          "name": "Crystal oscillator start-up time",
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          "unit": "MHz",
          "min": 13.553,
          "typ": 13.56,
          "max": 13.567,
          "conditions": "RF Enabled",
          "source_page": 21,
          "source": "datasheet"
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          "name": "Field modulation index",
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          "kind": "electrical",
          "unit": "percent",
          "min": 8,
          "typ": 11,
          "max": 14,
          "conditions": "RF Enabled, Transmitting Data",
          "source_page": 21,
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        {
          "name": "Thermal resistance junction to ambient",
          "symbol": "θJA",
          "kind": "thermal",
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          "min": null,
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          "name": "Thermal characterization parameter junction to board",
          "symbol": "ψJB",
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          "unit": "°C/W",
          "min": null,
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          "max": null,
          "conditions": "JEDEC multilayer board, nine thermal vias",
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        {
          "name": "ResetB pull-up resistor",
          "symbol": "RRST",
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          "unit": "kOhm",
          "min": null,
          "typ": 10,
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          "min": null,
          "typ": 10,
          "max": null,
          "conditions": "Unused input pin",
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    "at88rf1354-zu-hero.glb",
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    "at88rf1354-zu-etched.glb"
  ],
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  }
}