CD74HCT4046AE

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  "slug": "cd74hct4046ae",
  "title": "CD74HCT4046AE",
  "brief": "Texas Instruments Clock Generators / Frequency Synthesizers / PLL, PDIP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
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  "component": {
    "mpn": "CD74HCT4046AE",
    "manufacturer": "Texas Instruments",
    "package": "PDIP-16",
    "pin_count": 16,
    "category": "Clock and Timing",
    "subcategory": "Clock Generators / Frequency Synthesizers / PLL",
    "datasheet": "https://www.ti.com/lit/ds/symlink/cd74hct4046ae.pdf",
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    "distributor_links": {
      "lcsc": "C1535722",
      "digikey": "2156-CD74HCT4046AE-ND",
      "mouser": "595-CD74HCT4046AE"
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        "lifecycle": "Active"
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    "pins": [
      {
        "number": "1",
        "name": "PCPOUT",
        "type": "output",
        "description": "Phase comparator pulse output; the provided pages give no electrical limits for this pin."
      },
      {
        "number": "2",
        "name": "PC1OUT",
        "type": "output",
        "description": "Phase comparator 1 output; PC1 is an Exclusive-OR network whose averaged output is fed to the VCO input through the low-pass filter."
      },
      {
        "number": "3",
        "name": "COMPIN",
        "type": "input",
        "description": "Comparator input, which receives the VCO output either directly or through a frequency divider."
      },
      {
        "number": "4",
        "name": "VCOOUT",
        "type": "output",
        "description": "VCO output with a specified duty factor of 50%, connectable directly to COMPIN or through a frequency divider."
      },
      {
        "number": "5",
        "name": "INH",
        "type": "input",
        "description": "Inhibit input: a LOW level enables the VCO and demodulator, while a HIGH level turns both off to minimize standby power consumption."
      },
      {
        "number": "6",
        "name": "C1A",
        "type": "passive",
        "description": "Connection A of external capacitor C1, which together with R1 determines the VCO frequency range."
      },
      {
        "number": "7",
        "name": "C1B",
        "type": "passive",
        "description": "Connection B of external capacitor C1, connected between C1A and C1B."
      },
      {
        "number": "8",
        "name": "GND",
        "type": "power_in",
        "description": "Ground (0 V) return for the device and for external resistor R1, R2 and the DEMOUT load resistor RS."
      },
      {
        "number": "9",
        "name": "VCOIN",
        "type": "input",
        "description": "VCO input with high input impedance, which simplifies low-pass filter design."
      },
      {
        "number": "10",
        "name": "DEMOUT",
        "type": "output",
        "description": "Demodulator output equal to the VCO input voltage; a load resistor RS to GND should be connected if used, otherwise it should be left open."
      },
      {
        "number": "11",
        "name": "R1",
        "type": "passive",
        "description": "Connection for external resistor R1 to GND, which together with C1 determines the VCO frequency range."
      },
      {
        "number": "12",
        "name": "R2",
        "type": "passive",
        "description": "Connection for external resistor R2 to GND, which enables a VCO frequency offset if required."
      },
      {
        "number": "13",
        "name": "PC2OUT",
        "type": "output",
        "description": "Phase comparator 2 output; with no signal at SIGIN the PC2 loop adjusts the VCO to fMIN with VVCOIN = 0 V."
      },
      {
        "number": "14",
        "name": "SIGIN",
        "type": "input",
        "description": "Self-biased signal input that can be directly coupled for signals within HC family logic levels, while smaller swings require capacitive coupling."
      },
      {
        "number": "15",
        "name": "PC3OUT",
        "type": "output",
        "description": "Phase comparator 3 output; with no signal at SIGIN the PC3 loop adjusts the VCO to fMAX with VVCOIN = VCC."
      },
      {
        "number": "16",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply: 4.5 V to 5.5 V operation for HCT types, with the VCO section specified at 3 V to 6 V and the digital section at 2 V to 6 V."
      }
    ],
    "provenance": {
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        "guard_notes": [
          "extractor flagged: The datasheet does not assign electrical pin classes; these external RC connection pins were typed a; The provided pages name PCPOUT (Phase Comparator Pulse Output) but do not describe its function or l; The datasheet describes PC2 and PC3 behavior mainly via loop conditions on page 20; the descriptions",
          "2/16 pins cited to the wrong page (name found elsewhere): ['13:PC2OUT@p20', '15:PC3OUT@p20']"
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        "cost_usd": 0.0487,
        "at": "2026-10-28T21:04:05"
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        "pages": 38,
        "sha256": "13b9d2164822f9f0",
        "source_tier": "mfr"
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  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "PDIP-16",
      "Category": "Clock and Timing",
      "Pins": "16"
    },
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          "name": "Maximum storage temperature range",
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