CH340K

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CH340K

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Specifications

Manufacturer WCH(Jiangsu Qin Heng)
Package ESSOP-10-150mil-1mm
Operating Temperature -20℃~+70℃
Voltage - Supply 3.3V
Applications Function USB to serial
Protocol USB 2.0
Data Rate 2Mbps

Overview

Description

The CH340K is a USB to serial (UART) bridge chip commonly used in electronics for converting USB signals to TTL serial communication. It enables microcontrollers and other devices without USB capability to communicate with a computer over a USB connection.
The chip supports various baud rates and is compatible with standard serial communication protocols. It is often found in Arduino-compatible boards and various DIY electronics projects due to its low cost and ease of use.
Unlike other USB-to-serial converters, the CH340K does not require separate drivers for most operating systems, making it user-friendly. It typically comes in a small package, allowing it to be easily integrated into circuit designs.
Overall, the CH340K is a reliable choice for hobbyists and developers looking to connect their microcontroller projects to a PC for programming, debugging, or data communication.

Features

The CH340K is a USB to serial (UART) converter widely used in various electronic applications. Key features include:
1. USB 2.0 Compatibility: Supports full-speed USB 2.0, allowing easy connection to USB ports.
2. Multiple Protocol Support: Can handle UART, I2C, and SPI serial communication.
3. Wide Voltage Range: Operates with a power supply range of 3.3V to 5V, making it versatile for different systems.
4. Data Rate: Supports baud rates from 300 bps to 2 Mbps, accommodating various data transmission speeds.
5. Integrated Circuit: Combines USB interface and serial interface in a single chip, reducing component count.
6. Driver Support: Compatible with various operating systems, including Windows, macOS, and Linux, with readily available drivers.
7. Compact Size: Available in a small package, suitable for space-constrained applications.
Overall, the CH340K is a reliable and cost-effective solution for interfacing USB devices with serial communication systems.

Package

The CH340K typically comes in a miniature DIP-16 (dual in-line package) format. It is designed for easy integration into various electronic projects, particularly for USB to serial communication applications.

Pinout

The CH340K is a USB to serial UART bridge IC commonly used for connecting microcontrollers and other devices to a USB interface. It typically comes in a 16-pin package (such as SOP-16 or DIP-16).
### Pin Count and Functions:
1. VCC (Pin 1): Power supply input (3.3V to 5V).
2. GND (Pin 2): Ground.
3. TXD (Pin 3): Transmit data output (from CH340K to host).
4. RXD (Pin 4): Receive data input (from host to CH340K).
5. DTR (Pin 5): Data terminal ready, used for flow control.
6. RTS (Pin 6): Request to send, used for flow control.
7. CTS (Pin 7): Clear to send, used for flow control.
8. DCD (Pin 8): Data carrier detect (optional).
9. DSR (Pin 9): Data set ready (optional).
10. DTR (Pin 10): Data terminal ready (alternative pin).
11. VUSB (Pin 11): USB power input.
12. USB (Pins 12-16): USB D+ and D- pins for data communication.
Overall, the CH340K provides a reliable interface for serial communication via USB, making it popular in various electronic applications.

Manufacturer

The CH340K is manufactured by WCH (Nanjing Wenhua Information Technology Co., Ltd.), a Chinese company specializing in the design and production of integrated circuits (ICs) and related components. WCH focuses on USB-to-serial converter chips, microcontroller peripherals, and other communication interfaces. The CH340K is widely used in various applications, including Arduino-compatible boards, USB devices, and IoT projects due to its affordability and ease of integration. WCH has gained prominence in the electronics industry, particularly in the realms of hobbyist and consumer electronics.

Application

The CH340K is commonly used for USB to UART (serial) communication in various applications, including Arduino and other microcontroller programming, data logging, and interfacing with sensors. It is also utilized in industrial automation, robotics, and consumer electronics for connecting devices like GPS modules, GSM modules, and RFID readers to computers. Additionally, the CH340K supports USB connectivity in prototypes and hobbyist projects, facilitating easy communication between devices and PCs.

Equivalent

Equivalents to the CH340K chip include the FTDI FT232 series, CP2102 from Silicon Labs, and the PL2303 series from Prolific. These chips serve similar functions for USB to UART conversion and are commonly used in embedded systems and serial communication applications.

Shipping

Shipping MethodsWe

offer global shipping services through DHL, FedEx, TNT, UPS, or any other forwarder of your choice.


Shipping Fee Reference (DHL/FedEx):

DHL: Shipping cost ranges from $25-$45 (0.5kg), with an estimated delivery time of 2-5 business days.

FedEx: Shipping cost ranges from $25-$40 (0.5kg), with an estimated delivery time of 3-7 business days.

UPS: Shipping cost ranges from $25-$45 (0.5kg), with an estimated delivery time of 3-7 business days.

TNT: Shipping cost ranges from $25-$65 (0.5kg), with an estimated delivery time of 3-7 business days.

EMS: Shipping cost ranges from $30-$50 (0.5kg), with an estimated delivery time of 7-15 business days.

Registered Air Mail: Shipping cost is $2-$4 (0.1kg), with an estimated delivery time of 5-20 business days.

Payments

Payment Methods

The Payment term is 100% Prepaid.

Currently, we only accept the below payment methods:

1. PayPal

2. Credit/ Debit Card

3. Wire Transfer

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