CH340G

Part: CH340 from WCH

Type: USB to serial chip

Key Specs:

• USB compatibility: V2.0 (Full speed)
• UART communication baud rate: 50bps to 2Mbps
• Power supply: 5V, 3.3V, 3V
• IrDA communication baud rate (CH340R): 2400bps to 115200bps

Features:

• Full speed USB device interface, compatible with USB V2.0
• Emulate standard UART interface
• Original serial applications are totally compatible in Windows operation system
• Hardware full duplex serial UART interface, built-in transmit-receive buffer
• Supports common MODEM liaison signal RTS, DTR, DCD, RI, DSR and CTS
• Through external level conversion chip provide further RS232, RS485, RS422 interface
• CH340R supports IrDA criterion SIR infrared communication
• Software compatible with CH341, use driver of CH341 directly
• Support 5V and 3.3V power supply even 3V
• CH340C, CH340E and CH340B have built-in crystal
• CH340B integrates EEPROM used to configure the serial number
• SOP-16, SSOP-20 and MSOP-10 lead-free RoHS compliant package

Applications:

• Expand UART interface of computer
• Upgrade common serial device to USB bus directly
• Upgrade serial peripherals

Package:

• SOP-16: 3.9mm width, 1.27mm pitch
• MSOP-10: 3.0mm width, 0.50mm pitch
• SSOP-20: 5.30mm width, 0.65mm pitch

• Full speed USB device interface, compatible with USB V2.0.
• Emulate standard UART interface, used to upgrade the serial peripherals, or expand UART interface via USB bus.
• Original serial applications are totally compatible, without any modification in Windows operation system.
• Hardware full duplex serial UART interface, built-in transmit-receive buffer, supports communication baud rate varies from 50bps to 2Mbps.
• Supports common MODEM liaison signal RTS, DTR, DCD, RI, DSR and CTS.
• Through external level conversion chip provide further RS232, RS485, RS422 interface, etc.
• CH340R supports IrDA criterion SIR infrared communication, supports baud rate varies from 2400bps to 115200bps.
• Software compatible with CH341, use driver of CH341 directly.
• Support 5V and 3.3V power supply even 3V.
• CH340C, CH340E and CH340B have built-in crystal, no external crystal, CH340B also integrates EEPROM used to configure the serial number, etc.
• SOP-16 and SSOP-20 and MSOP-10 lead-free RoHS compliant package.

| Name | | Min. | Typical | Max. | Units | |------|-------------------------------------------------------------------------------------------|------------------------------------------------------|---------------------------|---------|-------|---------|----| | VCC | Supply Voltage | | V3 doesn't connect to VCC | 4.0 | 5 | 5.3 | V | | | | V3 connect to | CH340G/T/R | 2.8 | 3.3 | 3.6 | | | | VCC | CH340C/E/B | 3.0 | 3.3 | 3.6 | | | Operating Supply | | CH340G/C/E/T/R | | 7 | 20 | | ICC | | Current(Normal Operation) | CH340B | | 6 | 15 | mA | | | Operating Supply Current(USB | | VCC=5V | | 0.1 | 0.2 | | | ISLP | Suspend) | VCC=3.3V | | 0.09 | 0.15 | mA | | VIL | Low-level Input Voltage | | | -0.5 | | 0.7 | V | | VIH | High-level Input Voltage | | | 2.0 | | VCC+0.5 | V | | VOL | | Low-level Output Voltage(4mA draw current) | | | | 0.5 | V | | VOH | High-level Output Voltage(3mA output current)
(Output 100uA current during chip reset) | | | VCC-0.5 | | | V | | IUP | Input current input with built-in pull-up resistor | | | 3 | 150 | 300 | uA | | IDN | | Input current input with built-in pull-down resistor | | | -150 | -300 | uA | | VR | | Restrict voltage when power-up reset | | | 2.6 | 2.8 | V |