SN74HC283

{
  "schema_version": 1,
  "type": "component",
  "slug": "sn74hc283",
  "title": "SN74HC283",
  "brief": "TI 4-bit binary full adder with fast carry, SOIC-16. Adds two 4-bit numbers + carry-in, cascadable. HC 2-6 V. Datasheet-verified.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "logic",
    "adder",
    "arithmetic",
    "74hc",
    "soic-16",
    "texas-instruments"
  ],
  "component": {
    "mpn": "SN74HC283",
    "manufacturer": "Texas Instruments",
    "package": "SOIC-16",
    "pin_count": 16,
    "category": "Logic IC",
    "subcategory": "4-bit binary full adder",
    "datasheet": "https://www.ti.com/lit/ds/symlink/cd74hc283.pdf",
    "parts": {
      "symbol": "sn74hc283.kicad_sym",
      "footprint": "sn74hc283.kicad_mod",
      "model_3d": "sn74hc283-etched.glb",
      "model_3d_plain": "sn74hc283.glb",
      "lbr": "sn74hc283.lbr",
      "model_3d_step": "sn74hc283-etched.step",
      "model_3d_step_plain": "sn74hc283.step"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "S1",
        "type": "output",
        "description": "Sum bit 1 output. Bit 1 of the 4-bit binary sum of the A and B operands including the carry-in."
      },
      {
        "number": "2",
        "name": "B1",
        "type": "input",
        "description": "Bit 1 of the B operand (4-bit binary addend). CMOS logic input."
      },
      {
        "number": "3",
        "name": "A1",
        "type": "input",
        "description": "Bit 1 of the A operand (4-bit binary augend). CMOS logic input."
      },
      {
        "number": "4",
        "name": "S0",
        "type": "output",
        "description": "Sum bit 0 (least-significant) output. Bit 0 of the 4-bit binary sum of the A and B operands including the carry-in."
      },
      {
        "number": "5",
        "name": "A0",
        "type": "input",
        "description": "Bit 0 (least-significant) of the A operand (4-bit binary augend). CMOS logic input."
      },
      {
        "number": "6",
        "name": "B0",
        "type": "input",
        "description": "Bit 0 (least-significant) of the B operand (4-bit binary addend). CMOS logic input."
      },
      {
        "number": "7",
        "name": "CIN",
        "type": "input",
        "description": "Carry input. Carry from a lower-order adder stage; tie to GND when the SN74HC283 is used as the least-significant slice of a wider adder."
      },
      {
        "number": "8",
        "name": "GND",
        "type": "power_in",
        "description": "Ground reference (0 V) for logic and supply currents."
      },
      {
        "number": "9",
        "name": "COUT",
        "type": "output",
        "description": "Carry output. Carry generated from the four-bit addition; connects to the CIN of the next higher-order adder stage for cascaded expansion."
      },
      {
        "number": "10",
        "name": "S3",
        "type": "output",
        "description": "Sum bit 3 (most-significant) output. Bit 3 of the 4-bit binary sum of the A and B operands including the carry-in."
      },
      {
        "number": "11",
        "name": "B3",
        "type": "input",
        "description": "Bit 3 (most-significant) of the B operand (4-bit binary addend). CMOS logic input."
      },
      {
        "number": "12",
        "name": "A3",
        "type": "input",
        "description": "Bit 3 (most-significant) of the A operand (4-bit binary augend). CMOS logic input."
      },
      {
        "number": "13",
        "name": "S2",
        "type": "output",
        "description": "Sum bit 2 output. Bit 2 of the 4-bit binary sum of the A and B operands including the carry-in."
      },
      {
        "number": "14",
        "name": "A2",
        "type": "input",
        "description": "Bit 2 of the A operand (4-bit binary augend). CMOS logic input."
      },
      {
        "number": "15",
        "name": "B2",
        "type": "input",
        "description": "Bit 2 of the B operand (4-bit binary addend). CMOS logic input."
      },
      {
        "number": "16",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply voltage. HC types: 2 V to 6 V. HCT types: 4.5 V to 5.5 V. Bypass with a 0.1 uF ceramic capacitor to GND close to the pin."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/cd74hc283.pdf",
        "pages": 20,
        "sha256": "3e7d71c958d64074",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 16,
        "described": 16,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "logic": {
      "family_id": "74HC283",
      "logic_family": "74HC",
      "function_code": "283",
      "function_class": "Adder",
      "function_name": "4-Bit Binary Full Adder with Fast Carry",
      "manufacturer": "Texas Instruments",
      "is_specialty": false
    },
    "models_3d": [
      {
        "file": "sn74hc283.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          9.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "d5eeddb4c0b304dc61950919b126fc61d7586abd5f16ab71a2a79759ec6498bf",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "sn74hc283-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6,
          9.9,
          1.75
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "01face403763ca363b82e5a7f0eabb2a3880ff75b8a4fb9e9c2171fe3ca2a420",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Type": "4-bit binary full adder",
      "Adds": "two 4-bit words + carry-in",
      "Outputs": "4-bit sum (S0-S3) + carry-out",
      "Carry": "internal look-ahead (fast)",
      "Cascade": "COUT to next CIN",
      "Logic family": "HC (high-speed CMOS)",
      "Supply voltage": "2-6 V",
      "Package": "SOIC-16"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "sn74hc283",
    "74hc283",
    "4-bit adder",
    "binary adder",
    "full adder ic"
  ],
  "discovery_pitch": "SN74HC283 4-bit binary full adder (SOIC-16) with datasheet-verified pinout, KiCad symbol/footprint/3D, and full provenance.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "sn74hc283.kicad_sym",
    "sn74hc283.kicad_mod",
    "sn74hc283.glb",
    "sn74hc283.lbr",
    "docs/hero.png",
    "docs/sn74hc283-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "sn74hc283-etched.step"
  ],
  "variants": [
    {
      "mpn": "CD74HC283M (SOIC-16, tube)",
      "kind": "unknown"
    },
    {
      "mpn": "CD74HC283M96 (SOIC-16, tape & reel)",
      "kind": "unknown"
    }
  ]
}