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CP2102-GMR

SiLCP2102-GMR

Silicon Labs
Common USB-to-UART bridge with broad OS driver availability and many commercial breakout modules.
38,577 in stock

Overview

The CP2102-GMR is a highly integrated USB-to-UART bridge controller that provides a simple solution for updating RS-232 designs to USB using minimum components. It includes a USB 2.0 full-speed function controller, USB transceiver, oscillator, and a UART with full modem control signals in a compact 5x5 mm QFN28 package. The device features an internal 1024-byte EEPROM for customizing USB Vendor ID, Product ID, and other descriptors without external memory.

Why Choose This Part

The CP2102 stands out for its ease of implementation, requiring no external quartz crystals or EEPROMs due to its integrated clock and internal 1024-byte programmable memory. It supports a wide range of baud rates and provides robust driver support for Windows, macOS, and Linux, ensuring plug-and-play compatibility across different operating systems. The small 28-QFN footprint and low typical supply current of 20mA make it ideal for space-constrained and power-sensitive applications.

Applications

Legacy RS-232 to USB Upgrades
Replacing bulky serial connectors with USB ports in existing industrial or consumer designs.
Microcontroller Debugging
Providing a reliable serial console interface for programming and debugging embedded systems via a PC.
USB Dongles
Creating compact USB-to-TTL serial adapters for field service and device configuration.
Cellular Modem Interfaces
Bridging USB host controllers to cellular modules that require a high-speed UART interface for AT commands.

Key Specifications

Function Bridge, USB to UART
Protocol USB
Interface UART
Standards USB 2.0
Package / Case 28-VFQFN Exposed Pad
Current - Supply 20mA
Voltage - Supply 3V ~ 3.6V
Operating Temperature -40degC ~ 85degC
Supplier Device Package 28-QFN (5x5)

Getting Started

To begin development, download the Virtual COM Port (VCP) drivers from Silicon Labs to allow the device to appear as a standard COM port to the PC. The CP2102-GMR can be evaluated using various third-party breakout boards or the official Silicon Labs development kits. Engineers should ensure VDD is between 3.0V and 3.6V, though the VREGIN pin allows for 5V operation via the internal regulator.

Also Consider

FT232RL FTDI - A widely used alternative with an integrated EEPROM and similar driver stability, often preferred for legacy compatibility.
CH340G WCH - A low-cost alternative popular in hobbyist applications, though it requires an external crystal and specific drivers.
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