CH340C USB to Serial Converter IC | SOP-16 USB–UART Bridge with Built-In Crystal

The CH340C is a high-performance USB to Serial (USB–UART) converter IC designed by WCH to provide seamless communication between USB ports and UART-based devices. Featuring a built-in crystal oscillator, the CH340C eliminates the need for an external crystal, reducing design complexity and PCB space.

Supporting USB 2.0 full-speed operation and UART baud rates from 50 bps to 2 Mbps, the CH340C is widely used in development boards, embedded systems, USB serial adapters, printers, and industrial communication equipment. It provides full-duplex UART communication along with MODEM interface signals such as RTS, CTS, DTR, DSR, DCD, RI, ensuring broad protocol support.

The CH340C can also interface with RS232, RS485, and RS422 using the appropriate external level-shifting chips, making it a flexible and compact solution for serial communication designs.

Features / Specifications

• IC Type: USB to UART Converter

• Model: CH340C

• Package: SOP-16 (RoHS compliant)

• Supply Voltage: 0–5.5V

• USB Compatibility: Full-Speed USB 2.0

• Baud Rate: 50 bps to 2 Mbps

• Built-In Crystal Oscillator (no external crystal required)

• Hardware full-duplex UART

• MODEM Signals Supported: RTS, CTS, DTR, DSR, DCD, RI

• Works with RS232/RS485/RS422 via external level converters

• Fully compatible with CH341 drivers

• Supports 5V / 3.3V / 3V systems

• Suitable for USB-UART dongles, MCU programming, and communication modules

Applications

• USB serial communication for embedded systems

• USB-UART converters and adapters

• Printer interface modules

• Serial expansion on PCs and laptops

• RS232/RS485/RS422 communication (with interface chips)

• Consumer electronics, appliances, and control systems

Package Includes:
1 × CH340C USB to Serial Converter IC – SOP16

Note: Product images are for representation purposes only.