Description
Product Overview
The CP2102 USB to TTL UART Serial Converter Module is a compact, high-performance serial communication adapter that bridges the gap between a computer’s USB port and a microcontroller’s UART (Universal Asynchronous Receiver/Transmitter) interface. Based on the industry-leading CP2102 bridge controller from Silicon Labs, this module creates a virtual COM port on your computer, allowing you to program, debug, and communicate with embedded systems that lack native USB connectivity .
Whether you are working with an Arduino Pro Mini, ESP8266, ESP32, STM32, or other microcontrollers, this module provides a simple, reliable solution for serial communication . The board features a standard 6-pin interface with labels printed on the silk screen, plus dedicated 3.3V and 5V power output pins, and includes a self-recovery fuse for protection against accidental short circuits .
With a compact PCB size of just 26.5mm × 15.6mm and a full-speed USB 2.0 interface, this converter is perfect for programming, firmware updates, and serial debugging of a wide range of embedded systems . It’s a direct replacement for similar adapters like the FT232 and is widely recognized for its reliability and cross-platform compatibility .
Key Features
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Genuine CP2102 Chipset: Based on the high-performance Silicon Labs CP2102 USB-to-UART bridge controller with full hardware handshaking support .
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Broad Baud Rate Support: Supports baud rates from 300 bps up to 1 Mbps or even 921,600 bps, making it suitable for high-speed data transmission and programming .
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6-Pin Layout with Auto-Reset: Standard 6-pin 2.54mm pitch pinout (DTR, RX, TX, VCC, 5V, GND) featuring a DTR line for automatic reset of Arduino-compatible boards during upload .
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Dual Voltage Output: Provides both 3.3V and 5V power outputs to supply your target device. The 5V output is limited to 500mA (typical USB standard) .
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Integrated Protection: Features a self-recovery fuse that protects your computer’s USB port and the target device in the event of an accidental short circuit .
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Visual Status LEDs: Three onboard LEDs provide clear status indication: POWER (red), TXD (data transmission), and RXD (data reception) for real-time activity monitoring .
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USB 2.0 Compliant: Meets USB 2.0 full-speed (12 Mbps) specifications, ensuring compatibility with modern computers and operating systems .
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No External Crystal Required: The chip features an integrated clock, eliminating the need for external crystal oscillators and simplifying design and use .
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Cross-Platform Driver Support: Works out of the box or with simple driver installation on Windows, macOS, and Linux, with Silicon Labs providing official drivers .
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Extra I/O Pin Support: In addition to the main 6 pins, the RX, TX, RTS, and CTS pins are accessible on the side for advanced debugging and hardware handshaking .
Technical Specifications
| Parameter | Operating Value | |
|---|---|---|
| Chipset | Silicon Labs CP2102 | |
| Interface | USB 2.0 to TTL UART (Full Speed, 12 Mbps) | |
| Operating Voltage | 5V (via USB) / 3.3V (LDO Regulator) | |
| Voltage Outputs | 3.3V & 5V (Dual Output) | |
| Baud Rate Range | 300 bps – 921,600 bps / 1 Mbps | |
| Supported Protocols | TTL (5V/3.3V logic), UART, RS-232 | |
| Data Format | 5, 6, 7, 8 data bits; 1, 1.5, 2 stop bits; Parity/No Parity | |
| Pin Header | Standard 6-pin 2.54mm pitch + 2-pin RTS/CTS | |
| Buffer Size | 512 Bytes Receive | 512 Bytes Transmit |
| Operating Temperature | -40°C to +85°C | |
| Dimensions (L×W×H) | 26.5mm × 15.6mm × 4mm | |
| Weight | Approx. 4g | |
| Cable Length | Approx. 100cm (standard USB-A to USB 2.0) |
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