CH9102 USB to TTL UART Serial Converter Module (Red Version with Cable & Packaging) – STC Programmer Downloader

Description

Product Overview

The CH9102 USB to TTL UART Serial Converter Module is a complete, high-performance programming and communication solution designed to bridge the gap between your computer’s USB port and microcontrollers or embedded systems. Based on the advanced CH9102 chip from Nanjing Qinheng (WCH), this module serves as a pin-to-pin compatible alternative to the popular CP2102, offering enhanced features and wider compatibility .

What sets this red version apart is its complete package – the module comes pre-soldered with header pins and includes a high-quality USB cable and retail packaging, making it a particularly convenient choice for users who want a hassle-free, “out of the box” experience. The module features the CH9102 chip, which supports an impressive maximum baud rate of up to 4Mbps – significantly faster than many competing solutions .

The CH9102 provides common MODEM signals to expand the UART interface of computers and is ideal for upgrading common serial devices or MCUs to USB bus connectivity . This module is specifically designed as an STC Microcontroller Programmer Downloader, making it widely used for flashing code onto STC series microcontrollers, as well as a universal serial adapter for Arduino Pro Mini, ESP8266, ESP32, STM32, and other UART devices .

Key Features

• High-Performance CH9102 Chipset: Based on the advanced CH9102 USB 2.0 to UART bridge controller from Nanjing Qinheng (WCH), offering pin-to-pin compatibility with CP2102 and enhanced performance

• Ultra-Fast 4Mbps Baud Rate: Supports baud rates up to 4 Mbps – significantly faster than CP2102 (1.5Mbps), enabling ultra-fast data transmission and firmware uploads

• Wide Logic Level Compatibility: Serial port signals support 1.8V, 2.5V, 3.3V, and 5V logic levels, making it incredibly versatile for different target devices

• Complete Kit with Cable & Accessories: Includes the red module, USB-A to USB cable, and often jumper wires – ready to use right out of the box

• STC Microcontroller Programmer: Specifically designed to support the full range of STC single-chip microcomputers for program download and flashing

• Dual Power Outputs (3.3V & 5V): Provides both 3.3V (up to 50mA) and 5V (up to 500mA) power outputs to supply your target device

• Integrated Self-Recovery Fuse: Onboard resettable fuse protects your computer’s USB port and the module from short circuits and overcurrent conditions

• Visual Status LEDs: Three onboard LEDs provide clear status indication: POWER (red), TXD (green), and RXD (blue/red) for real-time activity monitoring

• Low Power Consumption: Operating current as low as 3mA with standby current of 90µA, making it suitable for battery-powered applications

• Industrial Temperature Range: Rated for operation from -40°C to +85°C, suitable for demanding environments

Technical Specifications