SN74HC688PWR

{
  "schema_version": 1,
  "type": "component",
  "slug": "sn74hc688pwr",
  "title": "SN74HC688PWR",
  "brief": "Texas Instruments Comparators, TSSOP-20. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "op-amp-cmp",
    "sn74hc688pwr"
  ],
  "component": {
    "mpn": "SN74HC688PWR",
    "manufacturer": "Texas Instruments",
    "package": "TSSOP-20",
    "pin_count": 20,
    "category": "Op-amp/Cmp",
    "subcategory": "Comparators",
    "datasheet": "https://www.ti.com/lit/ds/symlink/sn74hc688.pdf",
    "parts": {
      "symbol": "sn74hc688pwr.kicad_sym",
      "footprint": "sn74hc688pwr.kicad_mod",
      "model_3d": "sn74hc688pwr-etched.glb",
      "model_3d_plain": "sn74hc688pwr.glb",
      "model_3d_step": "sn74hc688pwr-etched.step",
      "model_3d_step_plain": "sn74hc688pwr.step",
      "lbr": "sn74hc688pwr.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "OE",
        "type": "input",
        "description": "Active-low output enable. When held high, the P=Q output is forced to the high level regardless of the data inputs; when held low, the comparator output reflects the P vs Q comparison."
      },
      {
        "number": "2",
        "name": "P0",
        "type": "input",
        "description": "Bit 0 of the P input word. Compared against Q0 by an internal XNOR stage; must be driven to a valid CMOS level (VIH/VIL per Recommended Operating Conditions)."
      },
      {
        "number": "3",
        "name": "Q0",
        "type": "input",
        "description": "Bit 0 of the Q input word. Compared against P0 by an internal XNOR stage."
      },
      {
        "number": "4",
        "name": "P1",
        "type": "input",
        "description": "Bit 1 of the P input word. Compared against Q1."
      },
      {
        "number": "5",
        "name": "Q1",
        "type": "input",
        "description": "Bit 1 of the Q input word. Compared against P1."
      },
      {
        "number": "6",
        "name": "P2",
        "type": "input",
        "description": "Bit 2 of the P input word. Compared against Q2."
      },
      {
        "number": "7",
        "name": "Q2",
        "type": "input",
        "description": "Bit 2 of the Q input word. Compared against P2."
      },
      {
        "number": "8",
        "name": "P3",
        "type": "input",
        "description": "Bit 3 of the P input word. Compared against Q3."
      },
      {
        "number": "9",
        "name": "Q3",
        "type": "input",
        "description": "Bit 3 of the Q input word. Compared against P3."
      },
      {
        "number": "10",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference (0 V). Return path for VCC supply current and logic input/output reference."
      },
      {
        "number": "11",
        "name": "P4",
        "type": "input",
        "description": "Bit 4 of the P input word. Compared against Q4."
      },
      {
        "number": "12",
        "name": "Q4",
        "type": "input",
        "description": "Bit 4 of the Q input word. Compared against P4."
      },
      {
        "number": "13",
        "name": "P5",
        "type": "input",
        "description": "Bit 5 of the P input word. Compared against Q5."
      },
      {
        "number": "14",
        "name": "Q5",
        "type": "input",
        "description": "Bit 5 of the Q input word. Compared against P5."
      },
      {
        "number": "15",
        "name": "P6",
        "type": "input",
        "description": "Bit 6 of the P input word. Compared against Q6."
      },
      {
        "number": "16",
        "name": "Q6",
        "type": "input",
        "description": "Bit 6 of the Q input word. Compared against P6."
      },
      {
        "number": "17",
        "name": "P7",
        "type": "input",
        "description": "Bit 7 (MSB) of the P input word. Compared against Q7."
      },
      {
        "number": "18",
        "name": "Q7",
        "type": "input",
        "description": "Bit 7 (MSB) of the Q input word. Compared against P7."
      },
      {
        "number": "19",
        "name": "P=Q",
        "type": "output",
        "description": "Active-low equality output. Drives low when all eight P bits equal the corresponding Q bits and OE is low; drives high otherwise or whenever OE is high. Rated for ±4 mA drive at 5 V (up to 10 LSTTL loads)."
      },
      {
        "number": "20",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply voltage, 2 V to 6 V (5 V nominal). A 0.1-µF bypass capacitor placed close to this pin is recommended; paralleling with a 1-µF cap is common."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/sn74hc688.pdf",
        "pages": 24,
        "sha256": "d600a33f4ebb7089",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 20,
        "described": 20,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "logic": {
      "family_id": "74HC688",
      "logic_family": "74HC",
      "function_code": "688",
      "function_class": "Comparator",
      "function_name": "8-Bit Magnitude Comparator",
      "manufacturer": "Texas Instruments",
      "is_specialty": false
    },
    "models_3d": [
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        "file": "sn74hc688pwr.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.4,
          6.5,
          1.2
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "97339947f3a7196470ec2f1d9f9b92bb2fc2ab66ad53be0cf105192585ef3c9a",
        "checked": "2026-10-07",
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        "origin": "footprint origin = pad-pattern centre",
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        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
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        "sha256": "f5ef0fbd93dfe46c4541f3ed83e3e984ce2b55292b422e995f1a465423e30011",
        "checked": "2026-10-07",
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      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Texas Instruments",
      "Package": "TSSOP-20",
      "Category": "Op-amp/Cmp",
      "Pins": "20"
    }
  },
  "variants": [
    {
      "mpn": "SN74HC688PWR",
      "kind": "packaging"
    },
    {
      "mpn": "SN74HC688PWRE4",
      "kind": "packaging"
    },
    {
      "mpn": "SN74HC688PWRPWT",
      "kind": "packaging"
    },
    {
      "mpn": "SN74HC688PWRDW",
      "kind": "packaging"
    },
    {
      "mpn": "SN74HC688PWRDWR",
      "kind": "packaging"
    },
    {
      "mpn": "SN74HC688PWRDWRE4",
      "kind": "packaging"
    },
    {
      "mpn": "SN74HC688PWRDWRG4",
      "kind": "packaging"
    },
    {
      "mpn": "SN74HC688PWRN",
      "kind": "packaging"
    },
    {
      "mpn": "SN74HC688PWRJ",
      "kind": "packaging"
    },
    {
      "mpn": "SN74HC688PWRFK",
      "kind": "packaging"
    }
  ],
  "sections": [
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  "discovery_triggers": [
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  "discovery_pitch": "SN74HC688PWR (Texas Instruments) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
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  "visibility": {
    "public": true
  },
  "updated_at": "2026-09-25T07:10:12.518Z"
}