CH340C
Interface Controllers
Technical Specifications
| Type | Description |
|---|---|
| Working Voltage V | 4.15 V |
| Data Rate | 2000000 |
| Iq A | 5e-05 |
| Number of ports | - |
| Applications Function | Transceiver |
| Type | Description |
|---|---|
| USB Protocol | USB 2.0 |
| Current - Supply | 7mA |
| Operating Temp | -20°C ~ +70°C |
| Features | Programmable baud rate;Power-on reset;Built-in clock generator |
| Package / Case | SOP-16 |
Product Introduction
CH340 is a USB bus adapter chip, can realize USB to serial port or USB to print port. In serial port mode, CH340 provides commonly used MODEM contact signals, which are used to expand asynchronous serial ports for computers, or directly upgrade ordinary serial port devices to the USB bus.
Features
- Full-speed USB device interface, compatible with USB V2.0.
- Simulation of standard serial ports, used to upgrade original serial port peripherals, or add additional serial ports through USB.
- The serial port application program under the Windows operating system on the computer side is fully compatible, no need to be modified.
- Hardware full-duplex serial port, built-in transceiver buffer, supports communication baud rate of 50bps~2Mbps.
- Support commonly used MODEM contact signals RTS, DTR, DCD, RI, DSR, CTS
- Provide RS232, RS485, RS422 interfaces by adding level conversion devices.
- CH340R supports IrDA specification SIR infrared communication, and baud rate from 2400bps to 115200bps.
- Built-in firmware, and software compatible with CH341, you can use the VCP driver of CH341 directly.
- Support 5V and 3.3V supply voltage.
- CH340C/N/K/E/X/B has a built-in clock, requires no external crystal. CH340B also has a built-in EEPROM for configuring the serial number.
- SOP-16, SOP-8 and SSOP-20, ESSOP-10, MSOP-10 lead-free packages are available, RoHS compatible.
Datasheet
Alternative Parts
Common CH340C alternatives overseas buyers search for:
Compliance & Export Codes
| Type | Details |
|---|---|
| CNHTS | 8542399000 |
| USHTS | 8542390001 |
| TARIC | 8542399000 |
| CAHTS | 8542390000 |
| Type | Details |
|---|---|
| BRHTS | 85423999 |
| INHTS | 85423900 |
| MXHTS | 8542.39.99 |
Frequently Asked Questions
What are the key features and operating specifications of the WCH CH340C USB-to-UART converter?
The WCH CH340C is a USB 2.0 Full-Speed USB-to-UART bridge IC that converts USB communication into standard asynchronous serial (UART) signals. The CH340C features an integrated clock generator, eliminating the need for an external 12MHz crystal and associated capacitors. It supports UART communication rates from 50bps up to 2Mbps and operates with either a 3.3V or 5V supply, depending on the circuit configuration. The device is available in compact surface-mount packages and can also support RS232, RS485, and RS422 interfaces when used with appropriate external level-conversion circuitry.
Can the CH340C communicate with microcontrollers?
Yes. The CH340C is designed to interface with devices that provide a standard UART interface. It converts USB communication from a host computer into UART transmit (TXD) and receive (RXD) signals, enabling programming, debugging, and serial data communication. The datasheet includes reference circuits for connecting the CH340C to MCU serial ports for USB-to-UART communication.
Why would a designer choose the CH340C instead of another USB-to-UART bridge IC?
The CH340C integrates a USB-to-UART interface with a built-in clock generator, eliminating the need for an external 12MHz crystal and associated capacitors. This reduces external component count and simplifies circuit design. The device supports USB 2.0 Full-Speed communication and UART data rates up to 2Mbps, making it suitable for a wide range of USB-to-serial applications.
Sourcing Information
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