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CP2108-B03-GMR

USB-to-Quad-UART bridge, 4ch, 2Mbps, 16 GPIO, QFN-64

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Manufacturer Part：

CP2108-B03-GMR

Package：

QFN-64 (9.0 x 9.0 x 0.9 mm, exposed pad)

Brand：
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Description

Product Overview

The CP2108-B03-GMR from Silicon Labs is a single-chip USB-to-Quad-UART bridge controller providing four independent serial ports from a single USB 2.0 full-speed connection.

Key Specifications

Manufacturer Silicon Labs
Bridge Type USB to Quad UART
USB 2.0 Full-Speed (12 Mbps)
UART Channels 4 independent
Baud Rate 300 bps to 2 Mbps per channel
GPIO 16 pins with configurable options
Supply Voltage 3.0V to 3.6V (self-powered) / 4.0-5.5V (bus)
Supply Current 56 mA typical
Modem Control Full (RTS/CTS/DTR/DSR/DCD/RI per channel)
EEPROM On-chip customizable (VID/PID/SN)
Package QFN-64 (9x9mm)
Operating Temperature -40°C to +85°C
MSL 3 (168 hours)

Features

  • USB to 4 independent UART bridges
  • No firmware development required
  • Integrated USB transceiver (no external resistors)
  • Integrated clock (no external crystal)
  • On-chip voltage regulator (3.3V output)
  • 16 GPIOs with configurable options
  • Royalty-free VCP drivers (Win/Mac/Linux)
  • Simple GUI-based configurator
  • UART3 supports up to 6V logic

Applications

  • Server management ports
  • Industrial control multi-serial
  • Point-of-sale terminals
  • Test and instrumentation

The CP2108-B03-GMR from Silicon Labs is a highly integrated USB-to-Quad-UART bridge controller providing four independent serial channels from a single USB 2.0 full-speed connection. Each UART supports full modem control signals (RTS/CTS/DTR/DSR/DCD/RI) and baud rates from 300 bps to 2 Mbps. The on-chip EEPROM stores customizable USB descriptors (VID/PID/serial number). Integrated USB transceiver, oscillator, and voltage regulator minimize external components. 16 GPIO pins provide additional I/O flexibility.

The CP2108 enumerates as a composite USB device with four virtual COM ports. USB data is received by the function controller and routed to the appropriate UART channel via internal FIFOs. Each UART independently converts between USB data packets and asynchronous serial format. The on-chip EEPROM is programmed via USB to store vendor-specific configuration. VCP drivers translate USB data to standard COM port API calls on the host.

Pin Group Name Function
Multiple D+/D- USB data lines
Multiple TX(0-3)/RX(0-3) 4 UART transmit/receive
Multiple RTS/CTS/DTR/DSR/DCD/RI Modem control per channel
Multiple GPIO.0-GPIO.15 Configurable GPIO
Power VDD/VREGIN/VIO Power supply pins
  • Server baseboard management (4 serial ports)
  • Industrial multi-serial communication
  • Point-of-sale terminal connectivity
  • USB-to-RS232/RS485 multi-port adapters
Manufacturer Part Number Notes
Silicon Labs CP2108-B03-GM Tray package version
Silicon Labs CP2104-F03-GMR Single UART bridge
FTDI FT4232HL Quad UART alternative
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Service & Packaging

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Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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