CD4511B

{
  "schema_version": 1,
  "type": "component",
  "slug": "cd4511b",
  "title": "CD4511B",
  "brief": "TI BCD-to-7-segment latch/decoder/driver, SOIC-16. Drives common-cathode LED displays, lamp test + blanking. Datasheet-verified.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "driver",
    "display-driver",
    "bcd",
    "7-segment",
    "4511",
    "soic-16",
    "texas-instruments"
  ],
  "component": {
    "mpn": "CD4511B",
    "manufacturer": "Texas Instruments",
    "package": "SOIC-16",
    "pin_count": 16,
    "category": "Driver",
    "subcategory": "BCD-to-7-segment decoder / driver",
    "datasheet": "https://www.ti.com/lit/ds/symlink/cd4511b.pdf",
    "parts": {
      "symbol": "cd4511b.kicad_sym",
      "footprint": "cd4511b.kicad_mod",
      "model_3d": "cd4511b-etched.glb",
      "model_3d_plain": "cd4511b.glb",
      "lbr": "cd4511b.lbr",
      "model_3d_step": "cd4511b-etched.step",
      "model_3d_step_plain": "cd4511b.step"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "B",
        "type": "input",
        "description": "BCD data input bit B (weight 2). CMOS-level input latched on rising edge of LE."
      },
      {
        "number": "2",
        "name": "C",
        "type": "input",
        "description": "BCD data input bit C (weight 4). CMOS-level input latched on rising edge of LE."
      },
      {
        "number": "3",
        "name": "LT",
        "type": "input",
        "description": "Lamp Test (active low). When LT = 0 (with BL = 1), all seven segment outputs a-g are forced high to illuminate every segment for display test regardless of BCD inputs."
      },
      {
        "number": "4",
        "name": "BL",
        "type": "input",
        "description": "Blanking input (active low). When BL = 0 (with LT = 1), all seven segment outputs are forced low, blanking the display for intensity modulation/strobe applications."
      },
      {
        "number": "5",
        "name": "LE/STROBE",
        "type": "input",
        "description": "Latch Enable / Strobe. When LE = 0, BCD input data flows through the latch transparently; on LE = 1 the currently-latched BCD code is held and decoded regardless of subsequent input changes."
      },
      {
        "number": "6",
        "name": "D",
        "type": "input",
        "description": "BCD data input bit D (MSB, weight 8). CMOS-level input latched on rising edge of LE."
      },
      {
        "number": "7",
        "name": "A",
        "type": "input",
        "description": "BCD data input bit A (LSB, weight 1). CMOS-level input latched on rising edge of LE."
      },
      {
        "number": "8",
        "name": "VSS",
        "type": "power_in",
        "description": "Negative supply / ground reference (0 V). Common return for the BCD input latch, decoder logic, and segment driver emitters."
      },
      {
        "number": "9",
        "name": "e",
        "type": "output",
        "description": "Seven-segment driver output for segment e. Active-high n-p-n bipolar sourcing output capable of driving up to 25 mA into a common-cathode LED segment."
      },
      {
        "number": "10",
        "name": "d",
        "type": "output",
        "description": "Seven-segment driver output for segment d. Active-high sourcing output (up to 25 mA) for common-cathode display drive."
      },
      {
        "number": "11",
        "name": "c",
        "type": "output",
        "description": "Seven-segment driver output for segment c. Active-high sourcing output (up to 25 mA) for common-cathode display drive."
      },
      {
        "number": "12",
        "name": "b",
        "type": "output",
        "description": "Seven-segment driver output for segment b. Active-high sourcing output (up to 25 mA) for common-cathode display drive."
      },
      {
        "number": "13",
        "name": "a",
        "type": "output",
        "description": "Seven-segment driver output for segment a. Active-high sourcing output (up to 25 mA) for common-cathode display drive."
      },
      {
        "number": "14",
        "name": "g",
        "type": "output",
        "description": "Seven-segment driver output for segment g (center bar). Active-high sourcing output (up to 25 mA) for common-cathode display drive."
      },
      {
        "number": "15",
        "name": "f",
        "type": "output",
        "description": "Seven-segment driver output for segment f. Active-high sourcing output (up to 25 mA) for common-cathode display drive."
      },
      {
        "number": "16",
        "name": "VDD",
        "type": "power_in",
        "description": "Positive supply voltage. Operating range 3-18 V (absolute max VSS−0.5 V to +20 V). Decoupling with a 100 nF ceramic close to the pin is recommended."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://www.ti.com/lit/ds/symlink/cd4511b.pdf",
        "pages": 19,
        "sha256": "64e032d04d526047",
        "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": "CD4511",
      "logic_family": "CD4000",
      "function_code": "4511",
      "function_class": "Decoder",
      "function_name": "BCD-to-7-Segment Latch/Decoder/Driver",
      "manufacturer": "Texas Instruments",
      "is_specialty": false
    },
    "models_3d": [
      {
        "file": "cd4511b.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          9.9,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "d5eeddb4c0b304dc61950919b126fc61d7586abd5f16ab71a2a79759ec6498bf",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "cd4511b-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          6.0,
          9.9,
          1.75
        ],
        "zmin_mm": -0.0,
        "centre_offset_mm": 0.0,
        "footprint_binding": "identity",
        "sha256": "238178ee7d8487ea588bd993210b5e1c4b832254df725b6015ace8b64088010b",
        "checked": "2026-10-26",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Type": "BCD-to-7-segment decoder/driver",
      "Inputs": "4-bit BCD (A-D)",
      "Outputs": "7 segments (a-g), direct LED drive",
      "Display type": "common-cathode",
      "Controls": "latch enable, lamp test, blanking",
      "Logic family": "4000B CMOS",
      "Supply voltage": "3-18 V",
      "Package": "SOIC-16"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "cd4511b",
    "cd4511",
    "bcd to 7 segment",
    "7 segment decoder",
    "led display driver"
  ],
  "discovery_pitch": "CD4511B BCD-to-7-segment latch/decoder/driver (SOIC-16) with datasheet-verified pinout, KiCad footprint/3D, and full provenance.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "cd4511b.kicad_sym",
    "cd4511b.kicad_mod",
    "cd4511b.glb",
    "cd4511b.lbr",
    "docs/hero.png",
    "docs/cd4511b-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "cd4511b-etched.step"
  ],
  "variants": [
    {
      "mpn": "CD4511BM (SOIC-16, tube)",
      "kind": "packaging"
    },
    {
      "mpn": "CD4511BM96 (SOIC-16, tape & reel)",
      "kind": "packaging"
    }
  ]
}