CH455G

{
  "schema_version": 1,
  "type": "component",
  "slug": "ch455g",
  "title": "CH455G",
  "brief": "WCH Jiangsu Qin Heng LED Display Drivers, SOP-16. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "led-drv",
    "ch455g"
  ],
  "component": {
    "mpn": "CH455G",
    "manufacturer": "WCH Jiangsu Qin Heng",
    "package": "SOP-16",
    "pin_count": 16,
    "category": "LED-drv",
    "subcategory": "LED Display Drivers",
    "datasheet": "https://datasheet.lcsc.com/datasheet/pdf/cbf0b772e0f1ac7190a3d9b0b1958436.pdf",
    "parts": {
      "symbol": "ch455g.kicad_sym",
      "footprint": "ch455g.kicad_mod",
      "model_3d": "ch455g-etched.glb",
      "model_3d_plain": "ch455g.glb",
      "model_3d_step": "ch455g-etched.step",
      "model_3d_step_plain": "ch455g.step",
      "lbr": "ch455g.lbr"
    },
    "distributor_links": {
      "lcsc": "C89818"
    },
    "pins": [
      {
        "number": "1",
        "name": "SEG4",
        "type": "bidirectional",
        "description": "Segment 4 driver output (active-high, drives segment E of a common-cathode 7-seg digit) and row-4 key-scan input (active-high, with internal pull-down). Continuous drive current up to 40 mA per SEG pin."
      },
      {
        "number": "2",
        "name": "SEG5",
        "type": "bidirectional",
        "description": "Segment 5 driver output (active-high, drives segment F) and row-5 key-scan input (active-high, with internal pull-down). Max 40 mA per SEG."
      },
      {
        "number": "3",
        "name": "SEG6",
        "type": "bidirectional",
        "description": "Segment 6 driver output (active-high, drives segment G) and row-6 key-scan input (active-high, with internal pull-down). Max 40 mA per SEG."
      },
      {
        "number": "4",
        "name": "SEG7/INT#",
        "type": "output",
        "description": "In 8-segment mode: decimal-point segment driver (active-high). In 7-segment mode (typical for CH455G, which lacks a dedicated INT# pin): active-low keyboard interrupt output equivalent to INT#. Mode is chosen by the 7SEG bit of the Set System Parameter command."
      },
      {
        "number": "5",
        "name": "DIG0",
        "type": "output",
        "description": "Digit 0 drive (active-low, sinks common-cathode digit current up to 200 mA) during display scan; column-scan output (active-high) during keypad scan."
      },
      {
        "number": "6",
        "name": "SCL",
        "type": "input",
        "description": "2-wire serial clock input, I2C-compatible, up to 4 MHz. Internal pull-up (typ 200 uA); default high. Data is latched on rising edge."
      },
      {
        "number": "7",
        "name": "SDA",
        "type": "bidirectional",
        "description": "2-wire serial data, I2C-compatible open-drain with internal pull-up (typ 300 uA); default high. MSB-first; sampled on SCL rising edge, driven on SCL falling edge."
      },
      {
        "number": "8",
        "name": "GND",
        "type": "power_in",
        "description": "Common ground return; must sustain continuous current of at least 150 mA to sink the aggregated segment/digit drive current."
      },
      {
        "number": "9",
        "name": "DIG1",
        "type": "output",
        "description": "Digit 1 drive (active-low, up to 200 mA cathode sink) during display scan; column-scan output (active-high) during keypad scan."
      },
      {
        "number": "10",
        "name": "DIG2",
        "type": "output",
        "description": "Digit 2 drive (active-low, up to 200 mA cathode sink) during display scan; column-scan output (active-high) during keypad scan."
      },
      {
        "number": "11",
        "name": "DIG3",
        "type": "output",
        "description": "Digit 3 drive (active-low, up to 200 mA cathode sink) during display scan; column-scan output (active-high) during keypad scan."
      },
      {
        "number": "12",
        "name": "SEG0",
        "type": "bidirectional",
        "description": "Segment 0 driver output (active-high, drives segment A) and row-0 key-scan input (active-high, with internal pull-down). Max 40 mA per SEG."
      },
      {
        "number": "13",
        "name": "SEG1",
        "type": "bidirectional",
        "description": "Segment 1 driver output (active-high, drives segment B) and row-1 key-scan input (active-high, with internal pull-down). Max 40 mA per SEG."
      },
      {
        "number": "14",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply, 2.5 V to 5.3 V (recommended 2.7-5 V). Must sustain continuous current of at least 150 mA; decouple with 0.1 uF ceramic and >=100 uF bulk capacitor close to the pin."
      },
      {
        "number": "15",
        "name": "SEG2",
        "type": "bidirectional",
        "description": "Segment 2 driver output (active-high, drives segment C) and row-2 key-scan input (active-high, with internal pull-down). Max 40 mA per SEG."
      },
      {
        "number": "16",
        "name": "SEG3",
        "type": "bidirectional",
        "description": "Segment 3 driver output (active-high, drives segment D) and row-3 key-scan input (active-high, with internal pull-down). Max 40 mA per SEG."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://datasheet.lcsc.com/datasheet/pdf/cbf0b772e0f1ac7190a3d9b0b1958436.pdf",
        "pages": 9,
        "sha256": "3a6969e2dfa69978",
        "source_tier": "lcsc"
      },
      "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"
    },
    "pin1": {
      "pad": "1",
      "at": [
        -2.475,
        -4.445
      ],
      "corner": "top-left",
      "source": "silk-marker",
      "derived_from": "SOIC-16_3.9x9.9mm_P1.27mm@sha256:f9b5075740f7816c",
      "mark": "drawn"
    },
    "models_3d": [
      {
        "file": "ch455g.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": "ch455g-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": "24ba583b9896ec18e14b31486126195a0615e7a1c811cab0f37d5c38777cf716",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "WCH Jiangsu Qin Heng",
      "Package": "SOP-16",
      "Category": "LED-drv",
      "Pins": "16"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "ch455g"
  ],
  "discovery_pitch": "CH455G (WCH Jiangsu Qin Heng) component page with datasheet-verified CAD.",
  "author": {
    "name": "Ray"
  },
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "ch455g.kicad_sym",
    "ch455g.kicad_mod",
    "ch455g.glb",
    "ch455g.step",
    "ch455g-etched.step",
    "ch455g.lbr",
    "docs/hero.png",
    "docs/ch455g-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "variants": [
    {
      "mpn": "CH455G",
      "kind": "packaging"
    },
    {
      "mpn": "CH455K",
      "kind": "unknown"
    },
    {
      "mpn": "CH455H",
      "kind": "unknown"
    }
  ],
  "updated_at": "2026-09-24T19:02:41.090Z"
}