AD9517-4ABCPZ

{
  "slug": "ad9517-4abcpz",
  "version": "0.1.0",
  "type": "component",
  "description": "Analog Devices Clock Generators / Frequency Synthesizers / PLL, LFCSP-48(7x7). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
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    "rtc-clock chip",
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  "component": {
    "mpn": "AD9517-4ABCPZ",
    "manufacturer": "Analog Devices",
    "package": "LFCSP-48(7x7)",
    "pin_count": 49,
    "category": "RTC/Clock Chip",
    "subcategory": "Clock Generators / Frequency Synthesizers / PLL",
    "datasheet": "https://www.analog.com/media/en/technical-documentation/data-sheets/AD9517-4.pdf",
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    "distributor_links": {
      "lcsc": "C653513",
      "digikey": "505-AD9517-4ABCPZ-ND",
      "mouser": "584-AD9517-4ABCPZ"
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    "distributor_check": {
      "checked_at": "2026-10-28T16:00:42Z",
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    "pins": [
      {
        "number": "1",
        "name": "REFMON",
        "type": "output",
        "description": "Reference monitor output, a 3.3 V CMOS pin with multiple selectable functions set by Register 0x01B."
      },
      {
        "number": "2",
        "name": "LD",
        "type": "output",
        "description": "Lock detect output, a 3.3 V CMOS pin with multiple selectable functions set by Register 0x01A."
      },
      {
        "number": "3",
        "name": "VCP",
        "type": "power_in",
        "description": "Charge pump supply, which must satisfy VS ≤ VCP ≤ 5.0 V; it is usually 3.3 V, but must be 5 V when a 5 V external VCXO is used."
      },
      {
        "number": "4",
        "name": "CP",
        "type": "output",
        "description": "Charge pump output that connects to the external loop filter."
      },
      {
        "number": "5",
        "name": "STATUS",
        "type": "output",
        "description": "Status output, a 3.3 V CMOS pin with multiple selectable functions set by Register 0x017."
      },
      {
        "number": "6",
        "name": "REF_SEL",
        "type": "input",
        "description": "Reference select input that selects REF1 when low and REF2 when high, with an internal 30 kΩ pull-down resistor."
      },
      {
        "number": "7",
        "name": "SYNC",
        "type": "input",
        "description": "Active-low input for manual synchronization and manual holdover, edge sensitive, with an internal 30 kΩ pull-up resistor."
      },
      {
        "number": "8",
        "name": "LF",
        "type": "input",
        "description": "Loop filter input connected internally to the VCO control voltage node, with 31 pF of internal capacitance to ground that may affect loop filter design for large loop bandwidths."
      },
      {
        "number": "9",
        "name": "BYPASS",
        "type": "output",
        "description": "Pin for bypassing the LDO to ground with a capacitor."
      },
      {
        "number": "10",
        "name": "VS",
        "type": "power_in",
        "description": "3.3 V power supply pin."
      },
      {
        "number": "11",
        "name": "CLK",
        "type": "input",
        "description": "Complementary half of the self-biased differential clock input to the clock distribution section; it can be left floating when the internal VCO is used."
      },
      {
        "number": "12",
        "name": "CLK",
        "type": "input",
        "description": "Complementary half of the self-biased differential clock input to the clock distribution section; it can be left floating when the internal VCO is used."
      },
      {
        "number": "13",
        "name": "SCLK",
        "type": "input",
        "description": "Serial control port data clock input, a 3.3 V CMOS pin; write data is registered on its rising edge."
      },
      {
        "number": "14",
        "name": "CS",
        "type": "input",
        "description": "Serial control port active-low chip select, a 3.3 V CMOS pin with an internal 30 kΩ pull-up resistor."
      },
      {
        "number": "15",
        "name": "SDO",
        "type": "output",
        "description": "Serial control port unidirectional serial data output, used for readback only in unidirectional mode."
      },
      {
        "number": "16",
        "name": "SDIO",
        "type": "bidirectional",
        "description": "Serial control port bidirectional serial data input/output, also used as unidirectional serial data input."
      },
      {
        "number": "17",
        "name": "RESET",
        "type": "input",
        "description": "Active-low chip reset, a 3.3 V CMOS pin with an internal 30 kΩ pull-up resistor."
      },
      {
        "number": "18",
        "name": "PD",
        "type": "input",
        "description": "Active-low chip power-down, a 3.3 V CMOS pin with an internal 30 kΩ pull-up resistor."
      },
      {
        "number": "19",
        "name": "OUT2",
        "type": "output",
        "description": "LVPECL output, one side of a differential LVPECL output pair (OUT2)."
      },
      {
        "number": "20",
        "name": "OUT2",
        "type": "output",
        "description": "LVPECL output, the other side of the differential LVPECL output pair (OUT2)."
      },
      {
        "number": "21",
        "name": "VS_LVPECL",
        "type": "power_in",
        "description": "Extended-voltage LVPECL power pin, operating from 2.5 V to 3.3 V."
      },
      {
        "number": "22",
        "name": "OUT3",
        "type": "output",
        "description": "LVPECL output, one side of a differential LVPECL output pair (OUT3)."
      },
      {
        "number": "23",
        "name": "OUT3",
        "type": "output",
        "description": "LVPECL output, the other side of the differential LVPECL output pair (OUT3)."
      },
      {
        "number": "24",
        "name": "VS",
        "type": "power_in",
        "description": "3.3 V power supply pin."
      },
      {
        "number": "25",
        "name": "VS",
        "type": "power_in",
        "description": "3.3 V power supply pin."
      },
      {
        "number": "26",
        "name": "OUT6 (OUT6A)",
        "type": "output",
        "description": "LVDS or CMOS output, one side of a differential LVDS output or a single-ended CMOS output."
      },
      {
        "number": "27",
        "name": "OUT6 (OUT6B)",
        "type": "output",
        "description": "LVDS or CMOS output, one side of a differential LVDS output or a single-ended CMOS output."
      },
      {
        "number": "28",
        "name": "OUT7 (OUT7A)",
        "type": "output",
        "description": "LVDS or CMOS output, one side of a differential LVDS output or a single-ended CMOS output."
      },
      {
        "number": "29",
        "name": "OUT7 (OUT7B)",
        "type": "output",
        "description": "LVDS or CMOS output, one side of a differential LVDS output or a single-ended CMOS output."
      },
      {
        "number": "30",
        "name": "VS",
        "type": "power_in",
        "description": "3.3 V power supply pin."
      },
      {
        "number": "31",
        "name": "VS",
        "type": "power_in",
        "description": "3.3 V power supply pin."
      },
      {
        "number": "32",
        "name": "OUT5 (OUT5B)",
        "type": "output",
        "description": "LVDS or CMOS output, one side of a differential LVDS output or a single-ended CMOS output."
      },
      {
        "number": "33",
        "name": "OUT5 (OUT5A)",
        "type": "output",
        "description": "LVDS or CMOS output, one side of a differential LVDS output or a single-ended CMOS output."
      },
      {
        "number": "34",
        "name": "OUT4 (OUT4B)",
        "type": "output",
        "description": "LVDS or CMOS output, one side of a differential LVDS output or a single-ended CMOS output."
      },
      {
        "number": "35",
        "name": "OUT4 (OUT4A)",
        "type": "output",
        "description": "LVDS or CMOS output, one side of a differential LVDS output or a single-ended CMOS output."
      },
      {
        "number": "36",
        "name": "VS",
        "type": "power_in",
        "description": "3.3 V power supply pin."
      },
      {
        "number": "37",
        "name": "VS",
        "type": "power_in",
        "description": "3.3 V power supply pin."
      },
      {
        "number": "38",
        "name": "OUT1",
        "type": "output",
        "description": "LVPECL output, one side of a differential LVPECL output pair (OUT1)."
      },
      {
        "number": "39",
        "name": "OUT1",
        "type": "output",
        "description": "LVPECL output, the other side of the differential LVPECL output pair (OUT1)."
      },
      {
        "number": "40",
        "name": "VS_LVPECL",
        "type": "power_in",
        "description": "Extended-voltage LVPECL power pin, operating from 2.5 V to 3.3 V."
      },
      {
        "number": "41",
        "name": "OUT0",
        "type": "output",
        "description": "LVPECL output, one side of a differential LVPECL output pair (OUT0)."
      },
      {
        "number": "42",
        "name": "OUT0",
        "type": "output",
        "description": "LVPECL output, the other side of the differential LVPECL output pair (OUT0)."
      },
      {
        "number": "43",
        "name": "VS",
        "type": "power_in",
        "description": "3.3 V power supply pin."
      },
      {
        "number": "44",
        "name": "RSET",
        "type": "passive",
        "description": "Resistor connection that sets internal bias currents; nominal value is 4.12 kΩ."
      },
      {
        "number": "45",
        "name": "VS",
        "type": "power_in",
        "description": "3.3 V power supply pin."
      },
      {
        "number": "46",
        "name": "CPRSET",
        "type": "passive",
        "description": "Resistor connection that sets the charge pump current range; nominal value is 5.1 kΩ."
      },
      {
        "number": "47",
        "name": "REFIN (REF2)",
        "type": "input",
        "description": "Complementary half of the self-biased differential PLL reference input; alternatively a single-ended input for REF2."
      },
      {
        "number": "48",
        "name": "REFIN (REF1)",
        "type": "input",
        "description": "Complementary half of the self-biased differential PLL reference input; alternatively a single-ended input for REF1."
      },
      {
        "number": "49",
        "name": "EP",
        "type": "passive",
        "description": "Exposed pad (from the footprint; not named in the datasheet pin table)."
      }
    ],
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        "guard_notes": [
          "extractor flagged: The datasheet text extracted here does not preserve overbars, so complementary outputs share the pri"
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