SN74HC163DR

{
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  "type": "component",
  "slug": "sn74hc163dr",
  "title": "SN74HC163DR",
  "brief": "Texas Instruments Counters, Dividers, SOIC-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
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    "logic",
    "sn74hc163dr",
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  "component": {
    "mpn": "SN74HC163DR",
    "manufacturer": "Texas Instruments",
    "package": "SOIC-16",
    "pin_count": 16,
    "category": "Logic",
    "subcategory": "Counters, Dividers",
    "datasheet": "https://www.ti.com/lit/ds/symlink/sn74hc163.pdf",
    "parts": {
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      "lbr": "sn74hc163dr.lbr"
    },
    "distributor_links": {
      "lcsc": "C338758",
      "digikey": "296-31790-2-ND",
      "mouser": "595-SN74HC163DR"
    },
    "distributor_check": {
      "checked_at": "2026-10-21T17:50:07Z",
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        "pn": "296-31790-2-ND",
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        "pn": "595-SN74HC163DR",
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    },
    "pins": [
      {
        "number": "1",
        "name": "CLR",
        "type": "input",
        "description": "Active-low synchronous clear: a low level sets all four flip-flop outputs low after the next low-to-high CLK transition, regardless of the enable inputs."
      },
      {
        "number": "2",
        "name": "CLK",
        "type": "input",
        "description": "Buffered clock input; the four flip-flops trigger on the rising (positive-going) edge of CLK."
      },
      {
        "number": "3",
        "name": "A",
        "type": "input",
        "description": "Parallel preset data input (bit A); when LOAD is low, the outputs take the preset data after the next clock pulse. Unused inputs must be held at VCC or GND."
      },
      {
        "number": "4",
        "name": "B",
        "type": "input",
        "description": "Parallel preset data input (bit B); when LOAD is low, the outputs take the preset data after the next clock pulse. Unused inputs must be held at VCC or GND."
      },
      {
        "number": "5",
        "name": "C",
        "type": "input",
        "description": "Parallel preset data input (bit C); when LOAD is low, the outputs take the preset data after the next clock pulse. Unused inputs must be held at VCC or GND."
      },
      {
        "number": "6",
        "name": "D",
        "type": "input",
        "description": "Parallel preset data input (bit D); when LOAD is low, the outputs take the preset data after the next clock pulse. Unused inputs must be held at VCC or GND."
      },
      {
        "number": "7",
        "name": "ENP",
        "type": "input",
        "description": "Count-enable input; both ENP and ENT must be high for the counter to count, and transitions at ENP are allowed regardless of the CLK level."
      },
      {
        "number": "8",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference; the absolute maximum continuous current through VCC or GND is ±50 mA."
      },
      {
        "number": "9",
        "name": "LOAD",
        "type": "input",
        "description": "Active-low synchronous preset input; a low level disables the counter and loads the A-D data on the next clock pulse regardless of the enable inputs."
      },
      {
        "number": "10",
        "name": "ENT",
        "type": "input",
        "description": "Count-enable input that also feeds forward to enable RCO; both ENP and ENT must be high to count."
      },
      {
        "number": "11",
        "name": "QD",
        "type": "output",
        "description": "Counter output bit D (most significant bit of the 4-bit binary count); outputs can drive up to 10 LSTTL loads."
      },
      {
        "number": "12",
        "name": "QC",
        "type": "output",
        "description": "Counter output bit C; outputs can drive up to 10 LSTTL loads."
      },
      {
        "number": "13",
        "name": "QB",
        "type": "output",
        "description": "Counter output bit B; outputs can drive up to 10 LSTTL loads."
      },
      {
        "number": "14",
        "name": "QA",
        "type": "output",
        "description": "Counter output bit A (least significant bit); outputs can drive up to 10 LSTTL loads."
      },
      {
        "number": "15",
        "name": "RCO",
        "type": "output",
        "description": "Ripple-carry output that produces a high-level pulse while the count is maximum (9 or 15 with QA high) when ENT is high, for cascading stages."
      },
      {
        "number": "16",
        "name": "VCC",
        "type": "power_in",
        "description": "Supply voltage: recommended operating range 2 V to 6 V (5 V nominal), absolute maximum −0.5 V to 7 V."
      }
    ],
    "provenance": {
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        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The top-view pin list in the datasheet text is garbled. The pin assignment was taken from the 1..16 ; The datasheet gives no explicit description for the GND pin, so its description is limited to the pa"
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        "cost_usd": 0.0905,
        "at": "2026-10-21T17:44:32"
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      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/sn74hc163.pdf",
        "pages": 30,
        "sha256": "7033099817317f28",
        "source_tier": "mfr"
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      "pins": {
        "total": 16,
        "described": 16,
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  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "SOIC-16",
      "Category": "Logic",
      "Pins": "16"
    },
    "characteristics": {
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          "name": "Supply voltage",
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          "unit": "V",
          "min": 2,
          "typ": 5,
          "max": 6,
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        {
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          "conditions": "VCC = 2 V",
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          "name": "Low-level input voltage",
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        {
          "name": "Operating free-air temperature",
          "symbol": "TA",
          "kind": "recommended_operating",
          "unit": "°C",
          "min": -40,
          "typ": null,
          "max": 85,
          "conditions": "SN74HC163",
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          "name": "Supply voltage range",
          "symbol": "VCC",
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          "min": -0.5,
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          "conditions": "",
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        {
          "name": "Input clamp current",
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          "conditions": "VI < 0 or VI > VCC",
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          "conditions": "VO < 0 or VO > VCC",
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        {
          "name": "Package thermal impedance, D package",
          "symbol": "θJA",
          "kind": "thermal",
          "unit": "°C/W",
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          "name": "High-level output voltage",
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          "name": "High-level output voltage",
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          "name": "Low-level output voltage",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
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          "max": 0.1,
          "conditions": "VI = VIH or VIL, IOL = 20 µA, VCC = 2 V",
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        {
          "name": "Low-level output voltage",
          "symbol": "VOL",
          "kind": "electrical",
          "unit": "V",
          "min": null,
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          "conditions": "VI = VIH or VIL, IOL = 4 mA, VCC = 4.5 V",
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        {
          "name": "Input current",
          "symbol": "II",
          "kind": "electrical",
          "unit": "nA",
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          "typ": null,
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          "conditions": "VI = VCC or 0, VCC = 6 V",
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          "name": "Supply current",
          "symbol": "ICC",
          "kind": "electrical",
          "unit": "µA",
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          "conditions": "VI = VCC or 0, IO = 0, VCC = 6 V",
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        {
          "name": "Input capacitance",
          "symbol": "Ci",
          "kind": "electrical",
          "unit": "pF",
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          "max": 10,
          "conditions": "VCC = 2 V to 6 V",
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          "name": "Setup time before CLK↑, A, B, C, or D",
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          "name": "Setup time before CLK↑, ENP or ENT",
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          "name": "Setup time before CLK↑, ENP or ENT",
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