CH340B

Images are for reference only

CH340B

+BOM

  • ManufacturerWCH(Jiangsu Qin Heng)

  • Mfr. Part #CH340B

  • Datasheet CH340B DataSheet

  • In Stock16991

365 Days Quality Guarantee

7*24 hours service quarantee

90-day after-sales guarantee

Genuine Product Guarantee

Specifications

Attribute Value
Manufacturer WCH(Jiangsu Qin Heng)
Package / Case SOP-16
Voltage - Supply 3.3V
Applications Function Transceiver
Protocol USB 2.0
Data Rate 2Mbps

Overview

Description

The CH340B is a versatile USB-to-serial chip used for converting USB signals to UART, I2C, or SPI communication protocols. This chip is commonly employed in microcontroller projects, enabling devices to interface with computers or other USB-enabled systems. It supports a broad range of baud rates and offers compatibility with various operating systems, including Windows, macOS, and Linux.
One of the standout features of the CH340B is its cost-effectiveness and ease of integration into both professional and hobbyist electronics projects. It can be found in applications like Arduino boards, 3D printers, and other embedded systems. The chip typically requires minimal external components, making it easy to incorporate into new designs.
The CH340B is particularly favored in the maker and DIY community due to its simplicity and robust driver support. Its reliability and performance in converting USB signals make it a popular choice for serial communication tasks, providing a seamless connection between USB interfaces and standard serial data formats.

Equivalent

The CH340B chip is a USB to serial converter commonly used for interfacing computers with serial devices. Equivalent products include:
1. FTDI FT232RL: A widely used USB to serial UART interface.
2. Silicon Labs CP2102: Another popular USB to UART bridge, offering similar functionality.
3. Prolific PL2303: Known for its broad compatibility and ease of use.
4. MCP2221 from Microchip: Offers USB to UART/I2C/SMBus protocol conversion.
These alternatives vary in drivers, features, and price, but serve similar purposes.

Features

The CH340B is a USB-to-serial chip that facilitates communication between a computer and serial peripherals. Key features include:
1. USB Compatibility: Supports full-speed USB 2.0, providing a reliable interface for serial communication.
2. Multiple Interfaces: Offers RS232, RS485, and UART interfaces for versatile connectivity options.
3. Baud Rate Support: Capable of supporting baud rates from 50bps to 2Mbps, ensuring flexibility for various applications.
4. Built-in EEPROM: Integrates an EEPROM for storing custom configurations, eliminating the need for external memory.
5. Low Power Consumption: Operates with low power requirements, making it suitable for battery-powered devices.
6. Driver Support: Compatible with multiple operating systems, including Windows, Linux, and MacOS, to ensure broad usability.
7. Compact Package: Available in a small form factor, ideal for space-constrained designs.
The CH340B is commonly used in hobbyist electronics, prototyping, and industrial applications where USB-to-serial conversion is needed. Its ease of use and versatility make it a popular choice for developers and engineers.

Pinout

The CH340B is a USB to serial converter IC. It typically comes in a 16-pin package. Here is a brief overview of the pin functions:
1. VCC (Pin 1): Power supply, typically 5V or 3.3V.
2. D+ (Pin 2): USB data plus signal.
3. D- (Pin 3): USB data minus signal.
4. GND (Pin 4): Ground.
5. TXD (Pin 5): Transmit data output.
6. RXD (Pin 6): Receive data input.
7. RTS (Pin 7): Request to send output.
8. CTS (Pin 8): Clear to send input.
9. DTR (Pin 9): Data terminal ready output.
10. DSR (Pin 10): Data set ready input.
11. DCD (Pin 11): Data carrier detect input.
12. RI (Pin 12): Ring indicator input.
13. NC (Pin 13): Not connected.
14. SUSPEND (Pin 14): Suspend status output.
15. RST# (Pin 15): Reset, active low.
16. V3 (Pin 16): 3.3V output.
The CH340B is commonly used to provide a USB interface for microcontrollers and other devices requiring serial communication.

Manufacturer

The CH340B is manufactured by WCH (Nanjing Qinheng Microelectronics Co., Ltd.). WCH is a Chinese company that specializes in the development and production of integrated circuit chips and electronic components. The company is known for producing a variety of USB bridge chips, microcontrollers, and other related semiconductor products. The CH340 series, which includes the CH340B, is widely used for providing USB-to-serial conversion, making it popular in applications like microcontroller programming and data communication between computers and serial devices.

Application

The CH340B is a USB-to-serial converter chip widely used in various applications due to its reliability and cost-effectiveness. It is commonly used in:
1. Microcontroller Programming: Facilitates USB communication with microcontrollers, such as Arduino and other embedded systems.
2. Data Transfer Interfaces: Enables serial communication for devices like modems, routers, and serial port expansion.
3. IoT Devices: Supports connectivity for Internet of Things (IoT) applications, allowing devices to interface with computers or other controllers.
4. Industrial Automation: Used in equipment requiring serial communication for control and data acquisition.
5. Consumer Electronics: Found in USB gadgets, diagnostic tools, and development boards to provide USB interface capabilities.

Package

The CH340B is typically available in a 16-pin SOP (Small Outline Package). This package type is compact, making it suitable for use in space-constrained applications.