ch376t

{
  "slug": "ch376t",
  "version": "0.1.0",
  "type": "component",
  "description": "WCH Jiangsu Qin Heng USB Converters, SSOP-20-208mil. Datasheet-verified pinout, KiCad symbol/footprint/3D.",
  "tags": [
    "component",
    "interface",
    "ch376t"
  ],
  "dependencies": {},
  "hero": {
    "type": "image",
    "path": "docs/hero.png"
  },
  "files": [
    "page.json",
    "README.md",
    "ch376t.kicad_sym",
    "ch376t.kicad_mod",
    "ch376t.glb",
    "ch376t.step",
    "ch376t.lbr",
    "docs/hero.png",
    "docs/ch376t-datasheet.pdf",
    "viewers/symbol.html",
    "viewers/footprint.html",
    "ch376t-etched.step"
  ],
  "visibility": {
    "public": true
  },
  "author": {
    "name": "Ray"
  },
  "component": {
    "mpn": "CH376T",
    "manufacturer": "WCH Jiangsu Qin Heng",
    "package": "SSOP-20-208mil",
    "pin_count": 20,
    "category": "USB Converters",
    "parts": {
      "symbol": "ch376t.kicad_sym",
      "footprint": "ch376t.kicad_mod",
      "model_3d": "ch376t-etched.glb",
      "model_3d_plain": "ch376t.glb",
      "model_3d_step": "ch376t-etched.step",
      "model_3d_step_plain": "ch376t.step",
      "lbr": "ch376t.lbr"
    },
    "pins": [
      {
        "number": "1",
        "name": "INT#",
        "type": "output",
        "description": "Interrupt request output, active low, built-in pull-up resistor. Asserted to notify the MCU of USB/SD/file-system events (device connect, transfer complete, etc.)."
      },
      {
        "number": "2",
        "name": "RSTI",
        "type": "input",
        "description": "External reset input, active low, built-in pull-down resistor. Drive low to force a hardware reset of the chip."
      },
      {
        "number": "3",
        "name": "SPI#",
        "type": "input",
        "description": "Interface-mode configuration input latched during chip internal reset, built-in pull-up resistor. Selects between SPI device interface (low at reset) and UART serial interface (high at reset) for MCU communication."
      },
      {
        "number": "4",
        "name": "TXD",
        "type": "bidirectional",
        "description": "Dual-function pin: at chip internal reset it acts as an interface-configuration strap input (built-in pull-up); after reset it is the asynchronous serial (UART) transmit data output."
      },
      {
        "number": "5",
        "name": "RXD",
        "type": "input",
        "description": "Asynchronous serial (UART) receive data input, built-in pull-up resistor. Baud rate is programmable up to 3 Mbps via the SET_BAUDRATE command."
      },
      {
        "number": "6",
        "name": "SD_DI",
        "type": "input",
        "description": "Serial data input of the SD card SPI host interface (data from SD card to CH376), built-in pull-up resistor."
      },
      {
        "number": "7",
        "name": "V3",
        "type": "power_in",
        "description": "Internal 3.3 V regulator node. Tie to VCC when operating at 3.3 V supply; connect an external 0.01 uF decoupling capacitor when operating at 5 V supply."
      },
      {
        "number": "8",
        "name": "UD+",
        "type": "bidirectional",
        "description": "USB bus D+ data line. Connects directly to the USB connector D+ pin (host or device mode)."
      },
      {
        "number": "9",
        "name": "UD-",
        "type": "bidirectional",
        "description": "USB bus D- data line. Connects directly to the USB connector D- pin (host or device mode)."
      },
      {
        "number": "10",
        "name": "GND",
        "type": "power_in",
        "description": "Common ground reference; must be tied to the ground wire of the USB bus."
      },
      {
        "number": "11",
        "name": "XI",
        "type": "input",
        "description": "Crystal oscillator input terminal. Connect a 12 MHz crystal (with the usual load capacitors) between XI and XO."
      },
      {
        "number": "12",
        "name": "XO",
        "type": "output",
        "description": "Inverted crystal oscillator output terminal. Connect a 12 MHz crystal between XI and XO."
      },
      {
        "number": "13",
        "name": "SCS",
        "type": "input",
        "description": "SPI device interface chip-select input from the MCU, active low, built-in pull-up resistor."
      },
      {
        "number": "14",
        "name": "SCK",
        "type": "input",
        "description": "SPI device interface serial clock input from the MCU, built-in pull-up resistor. Supports SPI rates up to 24 MHz."
      },
      {
        "number": "15",
        "name": "SDI",
        "type": "input",
        "description": "SPI device interface serial data input (MOSI) from the MCU, built-in pull-up resistor."
      },
      {
        "number": "16",
        "name": "SDO",
        "type": "tri_state",
        "description": "SPI device interface serial data output (MISO) to the MCU. Three-state output; high-impedance when SCS is deasserted."
      },
      {
        "number": "17",
        "name": "SD_CS",
        "type": "output",
        "description": "SD card SPI host interface chip-select output, active low, open-drain with built-in pull-up resistor."
      },
      {
        "number": "18",
        "name": "SD_DO/RST",
        "type": "output",
        "description": "Dual-function pin. In SD card mode it is the SPI serial data output (SD_DO, data from CH376 to SD card). Before entering SD card mode it acts as a power-on/external reset output (RST), active high."
      },
      {
        "number": "19",
        "name": "SD_CK",
        "type": "output",
        "description": "SD card SPI host interface serial clock output (up to 6 MHz)."
      },
      {
        "number": "20",
        "name": "VCC",
        "type": "power_in",
        "description": "Positive power supply input. Supports 5 V, 3.3 V, or 3 V operation; requires an external 0.1 uF decoupling capacitor to GND."
      }
    ],
    "provenance": {
      "rebuilt": "component block rebuilt 2026-10-05 from this page's own README pinout table and .kicad_sym (pins cross-checked), no re-extraction"
    },
    "viewers": {
      "symbol": "viewers/symbol.html",
      "footprint": "viewers/footprint.html"
    },
    "distributor_links": {
      "lcsc": "C21282",
      "digikey": false,
      "mouser": false
    },
    "distributor_check": {
      "checked_at": "2026-10-05T18:55:44Z",
      "source": "Component Ocean /api/assign-pns + lcsc_map",
      "digikey": {
        "pn": null,
        "status": "no match"
      },
      "mouser": {
        "pn": null,
        "status": "no match"
      }
    },
    "models_3d": [
      {
        "file": "ch376t.step",
        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          7.8,
          7.2,
          2.1
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "c9a01a276d0b4d9561efd58f2fcee56f52c1b6ab464ea7a0380cab4e87a924e6",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "ch376t-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
          7.8,
          7.2,
          2.1
        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "807e9cdebb791d21a09c1ca644f1228b20d04b9897dc797ce4eab87269c5978b",
        "checked": "2026-10-07",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  }
}