Classic USB to UART Bridges

The high-performance, low cost , CP21xx USB to UART bridge Silicon Labs family offers a complete plug and play interface solution and a comprehensive design ecosystem created to speed time-to-market. The family offers royalty-free driver suites, crystal-less operation, in-system programming memory, and small body size packages to reduce cost, simplify design and shorten development time.  



Explore the Next Generation of USB Connectivity

  • Pin compatible with most existing CP210x devices.
  • Cost effective solution offering CP210x functionality plus more.
  • Interested in migrating from a CP210x to a CP2102N? Read our migration guide.

Classic USB Bridges Features

  • USB 2.0 compliant, full-speed (12 Mbps)
  • No external crystal required
  • Up to 1024 Bytes of EEPROM or OTP ROM
  • User-programmable custom Baud rates
  • Supports all modem interface signals
  • Baud Rates: up to 2 Mbps
  • Industrial temperature –40 to +85 °C

Get Started with USB to UART Bridge Evaluation

USB to UART Evaluation Kits

Begin development today for the Classic USB to UART devices with the USB to UART evaluation kits.


View Kits

Program and Configure

Download the latest version of Simplicity Studio™ and use the Xpress configurator programming tool for configuration, programming, and customization. 

Classic USB Bridges Product Matrix

Part Number Data Sheet Eval Kit Dig I/O Pins Package Type Package Size (mm) Internal Oscillator Communications EEPROM FIFO
CP2101 (NRND)
0 QFN28 5x5 No USB to UART Bridge 512 1024
CP2102 (NRND)
CP2102EK 0 QFN28 5x5 No USB to UART Bridge 1024 1024
CP2103 (NRND)
CP2103EK 4 QFN28 5x5 No USB to UART Bridge 1024 1024
CP2104 (NRND)
CP2104-MINIEK 4 QFN24 4x4 No UART to UART Bridge 1024 1152
CP2105EK 5 QFN24 4x4 No USB to Dual UART Bridge 296 608
CP2108EK 16 QFN64 9x9 No USB to Quad UART Bridge 1024 1536
CP2109 (NRND)
CP2102EK 0 QFN28 5x5 No UART to UART Bridge 1024 1024
CP2110EK 10 QFN24 4x4 No HID USB to UART Bridge 343 960
CP2112EK 8 QFN24 4x4 No HID USB to SMBus/I2C Bridge 194 512
CP2130 (NRND)
CP2130EK 11 QFN24 4x4 No USB to SPI Bridge 348 320
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