CH376S

{
  "schema_version": 1,
  "type": "component",
  "slug": "ch376s",
  "title": "CH376S",
  "brief": "WCH Jiangsu Qin Heng USB Converters, SOP-28-300mil. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.2.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
    "component",
    "interface",
    "ch376s"
  ],
  "component": {
    "mpn": "CH376S",
    "manufacturer": "WCH Jiangsu Qin Heng",
    "package": "SOP-28-300mil",
    "pin_count": 28,
    "category": "Interface",
    "subcategory": "USB Converters",
    "datasheet": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2403131103_WCH-Jiangsu-Qin-Heng-CH376S_C7464060.pdf",
    "parts": {
      "symbol": "ch376s.kicad_sym",
      "footprint": "ch376s.kicad_mod",
      "model_3d": "ch376s-etched.glb",
      "model_3d_plain": "ch376s.glb",
      "model_3d_step": "ch376s-etched.step",
      "model_3d_step_plain": "ch376s.step",
      "lbr": "ch376s.lbr"
    },
    "distributor_links": {},
    "pins": [
      {
        "number": "1",
        "name": "INT#",
        "type": "output",
        "description": "Interrupt request output to the MCU, active low, with built-in pull-up resistor. Signals events such as USB connect/disconnect, command completion, or file-system status."
      },
      {
        "number": "2",
        "name": "RSTI",
        "type": "input",
        "description": "External hardware reset input, active low, with built-in pull-down resistor. Tie high or leave floating for normal operation; pull low to force a hardware reset."
      },
      {
        "number": "3",
        "name": "WR#",
        "type": "input",
        "description": "Write strobe input of the 8-bit passive parallel port, active low, with built-in pull-up resistor. Latches data on the D0-D7 bus into CH376 when PCS# is asserted."
      },
      {
        "number": "4",
        "name": "RD#",
        "type": "input",
        "description": "Read strobe input of the 8-bit passive parallel port, active low, with built-in pull-up resistor. Drives the D0-D7 bus with CH376 output data when PCS# is asserted."
      },
      {
        "number": "5",
        "name": "TXD",
        "type": "bidirectional",
        "description": "Dual-function pin: interface-mode selection input during power-on reset (with internal pull-up), then serial data output of the asynchronous UART after reset."
      },
      {
        "number": "6",
        "name": "RXD",
        "type": "input",
        "description": "Serial data input of the asynchronous UART, with built-in pull-up resistor. Idle-high; receives serial commands from the MCU at up to 3 Mbps."
      },
      {
        "number": "7",
        "name": "SD_DI",
        "type": "input",
        "description": "SD-card SPI host MISO input (data from SD card to CH376), with built-in pull-up resistor. Sampled by CH376 on the SD_CK edge."
      },
      {
        "number": "8",
        "name": "A0",
        "type": "input",
        "description": "Parallel-port address input with built-in pull-up resistor. A0=1 selects the command/status register, A0=0 selects the data register."
      },
      {
        "number": "9",
        "name": "V3",
        "type": "power_in",
        "description": "3.3 V core rail. Tie directly to VCC when powered from 3.3 V; add an external 0.01 uF decoupling capacitor when VCC is 5 V (built-in LDO supplies the core)."
      },
      {
        "number": "10",
        "name": "UD+",
        "type": "bidirectional",
        "description": "USB bus D+ data line. Connects directly to the USB connector D+ pin; no external series resistor is required."
      },
      {
        "number": "11",
        "name": "UD-",
        "type": "bidirectional",
        "description": "USB bus D- data line. Connects directly to the USB connector D- pin; no external series resistor is required."
      },
      {
        "number": "12",
        "name": "GND",
        "type": "power_in",
        "description": "Common ground reference. Must be tied to the USB bus ground and to the local system ground."
      },
      {
        "number": "13",
        "name": "XI",
        "type": "input",
        "description": "Crystal oscillator input. Connect an external 12 MHz crystal between XI and XO with the standard load capacitors to ground."
      },
      {
        "number": "14",
        "name": "XO",
        "type": "output",
        "description": "Inverted crystal oscillator output. Connect an external 12 MHz crystal between XI and XO with the standard load capacitors to ground."
      },
      {
        "number": "15",
        "name": "D0",
        "type": "bidirectional",
        "description": "Bit 0 of the 8-bit bidirectional parallel data bus, three-state, with built-in pull-up resistor. Driven by CH376 during reads and by the MCU during writes."
      },
      {
        "number": "16",
        "name": "D1",
        "type": "bidirectional",
        "description": "Bit 1 of the 8-bit bidirectional parallel data bus, three-state, with built-in pull-up resistor."
      },
      {
        "number": "17",
        "name": "D2",
        "type": "bidirectional",
        "description": "Bit 2 of the 8-bit bidirectional parallel data bus, three-state, with built-in pull-up resistor."
      },
      {
        "number": "18",
        "name": "SCS/D3",
        "type": "bidirectional",
        "description": "Muxed pin. In SPI slave mode: SPI chip-select input, active low, with built-in pull-up resistor. In parallel mode: bit 3 of the D0-D7 bus."
      },
      {
        "number": "19",
        "name": "BZ/D4",
        "type": "bidirectional",
        "description": "Muxed pin. In SPI slave mode: BZ busy-status output, active high, indicating CH376 is processing. In parallel mode: bit 4 of the D0-D7 bus."
      },
      {
        "number": "20",
        "name": "SCK/D5",
        "type": "bidirectional",
        "description": "Muxed pin. In SPI slave mode: SPI serial clock input, with built-in pull-up resistor. In parallel mode: bit 5 of the D0-D7 bus."
      },
      {
        "number": "21",
        "name": "SDI/D6",
        "type": "bidirectional",
        "description": "Muxed pin. In SPI slave mode: SPI MOSI serial data input, with built-in pull-up resistor. In parallel mode: bit 6 of the D0-D7 bus."
      },
      {
        "number": "22",
        "name": "SDO/D7",
        "type": "bidirectional",
        "description": "Muxed pin. In SPI slave mode: SPI MISO serial data output, three-state (may also serve as an interrupt output via CMD_SET_SDO_INT). In parallel mode: bit 7 of the D0-D7 bus."
      },
      {
        "number": "23",
        "name": "SD_CS",
        "type": "output",
        "description": "SD-card SPI host chip-select output, open-drain, active low, with built-in pull-up resistor. Drives the CS pin of the attached SD/MMC/TF card."
      },
      {
        "number": "24",
        "name": "ACT#",
        "type": "output",
        "description": "Open-drain status output, active low, with built-in pull-up resistor. Indicates USB-device connection in host mode, SD-card SPI transfer success in SD host mode, or completion of USB-device configuration in device mode with built-in firmware. Typically drives an activity LED."
      },
      {
        "number": "25",
        "name": "SD_DO/RST",
        "type": "output",
        "description": "Muxed pin. Before SD-card mode is entered: RST power-on reset output, active high, usable to reset the external MCU. After SD-card mode is entered: SD_DO SPI-host serial data output (MOSI) to the SD card."
      },
      {
        "number": "26",
        "name": "SD_CK",
        "type": "output",
        "description": "SD-card SPI host serial clock output. Drives the SCLK pin of the attached SD/MMC/TF card at up to 6 MHz."
      },
      {
        "number": "27",
        "name": "PCS#",
        "type": "input",
        "description": "Parallel-port chip-select input, active low, with built-in pull-up resistor. Enables the 8-bit passive parallel interface when asserted."
      },
      {
        "number": "28",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive supply input, nominally 5 V, 3.3 V, or 3 V. Requires an external 0.1 uF decoupling capacitor placed close to the pin."
      }
    ],
    "provenance": {
      "extractor": "ds2sf",
      "datasheet": {
        "url": "https://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2403131103_WCH-Jiangsu-Qin-Heng-CH376S_C7464060.pdf",
        "pages": 34,
        "sha256": "a5b56270d8a36d93",
        "source_tier": "lcsc"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 28,
        "described": 28,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "models_3d": [
      {
        "file": "ch376s.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          11.636,
          18.16,
          2.666
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "ecc34510e8f74b6103a72c2f24133ad80006c738972a56531d1221b277fcecdb",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ch376s-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          11.636,
          18.16,
          2.666
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "d4b00d7f43e30244bf0e36c7e117f109232e6c88213c7ac96fc37b27a0805374",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "WCH Jiangsu Qin Heng",
      "Package": "SOP-28-300mil",
      "Category": "Interface",
      "Pins": "28"
    }
  },
  "sections": [
    "hero",
    "viewers",
    "readme",
    "breadcrumbs",
    "info"
  ],
  "discovery_triggers": [
    "ch376s"
  ],
  "discovery_pitch": "CH376S (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",
    "ch376s.kicad_sym",
    "ch376s.kicad_mod",
    "ch376s.glb",
    "ch376s.step",
    "ch376s-etched.step",
    "ch376s.lbr",
    "docs/hero.png",
    "docs/ch376s-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html"
  ],
  "visibility": {
    "public": true
  },
  "variants": [
    {
      "mpn": "CH376S",
      "kind": "packaging"
    },
    {
      "mpn": "CH376T",
      "kind": "unknown"
    }
  ],
  "updated_at": "2026-09-24T19:00:52.928Z"
}