CP2103 Datasheet, PDF (4/18 Pages) List of Unclassifed Manufacturers – SINGLE-CHIP USB TO UART BRIDGE

CP2103
1. System Overview
The CP2103 is a highly-integrated USB-to-UART Bridge Controller providing a simple solution for updating
RS-232/RS-485 designs to USB using a minimum of components and PCB space. The CP2103 includes a USB
2.0 full-speed function controller, USB transceiver, oscillator, EEPROM, and asynchronous serial data bus (UART)
with full modem control signals in a compact 5 x 5 mm QFN-28 package (sometimes called “MLF” or “MLP”). No
other external USB components are required.
The on-chip EEPROM may be used to customize the USB Vendor ID, Product ID, Product Description String,
Power Descriptor, Device Release Number, and Device Serial Number as desired for OEM applications. The
EEPROM is programmed on-board via the USB allowing the programming step to be easily integrated into the
product manufacturing and testing process.
Royalty-free Virtual COM Port (VCP) device drivers provided by Silicon Laboratories allow a CP2103-based
product to appear as a COM port to PC applications. The CP2103 UART interface implements all RS-232/RS-485
signals, including control and handshaking signals, so existing system firmware does not need to be modified. The
device also features up to (4) GPIO signals that can be user-defined for status and control information. Support for
I/O interface voltages down to 1.8 V is provided via a V_IO pin. In many existing RS-232 designs, all that is required
to update the design from RS-232 to USB is to replace the RS-232 level-translator with the CP2103. See
www.silabs.com for the latest application notes and product support information for CP2103.
An evaluation kit for the CP2103 (Part Number: CP2103EK) is available. It includes a CP2103-based USB-to-
UART/RS-232 evaluation board, a complete set of VCP device drivers, USB and RS-232 cables, and full
documentation. Contact a Silicon Labs’ sales representatives or go to www.silabs.com to order the CP2103
Evaluation Kit.
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Preliminary Rev. 0.2