CH340N SOP8 USB to serial port IC SOP-8

The CH340N SOP-8 is a compact USB to Serial (UART) interface IC that enables easy communication between USB ports and serial devices. Designed by WCH (Nanjing QinHeng Corp), this chip is widely used in embedded systems, microcontroller debugging, and USB-based communication modules due to its low power consumption and minimal external component requirements.

Key Features of CH340N SOP-8 USB to Serial Port IC:

• USB to UART Bridge: Converts USB signals to asynchronous serial UART.
• SOP-8 Package: Ultra-compact footprint suitable for small PCBs.
• Built-in USB Transceiver: Eliminates the need for external USB PHY.
• Full-Speed USB Support: Operates at 12 Mbps data rate.
• Low Power Operation: Operates with minimal current draw, ideal for portable applications.

Technical Specifications of CH340N SOP-8 USB to Serial Port IC:

• USB Specification: USB 2.0 Full-Speed compatible
• UART Interface: Supports baud rates from 50bps to 2Mbps
• Operating Voltage: 3.3V to 5V
• Operating Current: Typically less than 15mA
• Data Bits: 5, 6, 7, or 8
• Stop Bits: 1, 1.5, or 2
• Parity: None, Even, Odd, Mark, Space

Mechanical Specifications of CH340N SOP-8 USB to Serial Port IC:

• Package Type: SOP-8 (Small Outline Package)
• Package Dimensions: 5.0mm × 6.2mm
• Lead Pitch: 1.27mm
• RoHS Compliance: Yes

Dimensions:

• Length: 6.2mm
• Width: 5.0mm
• Height: 1.75mm (typical)
• Pin Pitch: 1.27mm

Mounting Options:

• SMD Mount: Designed for surface mounting using reflow soldering.
• Breakout Board: Often used on breakout boards for USB-UART conversion.

Schematic Diagram, Connection, Wiring and Pinout of CH340N IC:

• VCC: Power supply input (3.3V or 5V)
• GND: Ground
• TXD: Transmit data (output from CH340N)
• RXD: Receive data (input to CH340N)
• UD+ / UD-: USB differential data lines
• RST: Optional reset pin (can be left floating or tied to VCC)

Datasheet of CH340N SOP-8 USB to Serial Port IC:

• Download CH340N Datasheet (PDF)

Applications of CH340N SOP-8 USB to Serial Port IC:

• Microcontroller Programming: Used for serial communication with Arduino, ESP, STM32, and similar platforms.
• USB to TTL Converter: Replaces traditional RS232 converters in modern USB systems.
• Firmware Debugging: Enables real-time serial data monitoring during embedded development.
• Wireless Modules: Interface with Bluetooth, Wi-Fi, or Zigbee modules.
• Portable Devices: Integrates easily into USB-powered handheld electronics.

Equivalent of CH340N SOP-8 USB to Serial Port IC:

• FT232RL: Full-featured USB to Serial converter from FTDI
• CP2102: Silicon Labs USB-UART bridge with wide support
• PL2303: Prolific’s USB to Serial solution

Package Includes:

• 1 x CH340N SOP-8 USB to Serial Port IC