CP2102

4Rev. 1.2

1. System Overview

The CP2102 is a highly-integrated USB-to-UART Bridge Controller providing a simple solution for updating RS-232

designs to USB using a minimum of components and PCB space. The CP2102 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. 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 CP2102-based

product to appear as a COM port to PC applications. The CP2102 UART interface implements all RS-232 signals,

including control and handshaking signals, so existing system firmware does not need to be modified. 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 CP2102. Direct access driver support is available through the Silicon Laboratories

USBXpress driver set.

An evaluation kit for the CP2102 (Part Number: CP2102EK) is available. It includes a CP2102-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 CP2102

Evaluation Kit.

2. Absolute Maximum Ratings

Table 1. Absolute Maximum Ratings

Parameter

Conditions

Min

Typ

Max

Units

Ambient temperature under bias

–55

—

125

°C

Storage Temperature

–65

—

150

°C

Voltage on any I/O Pin or RST with respect to GND

–0.3

—

5.8

V

–0.3

—

4.2

V

——

500

mA

Maximum output current sunk by RST or any I/O pin

——

100

mA

Note: Stresses above those listed may cause permanent damage to the device. This is a stress rating only, and functional

operation of the devices at or exceeding the conditions in the operation listings of this specification is not implied.

Exposure to maximum rating conditions for extended periods may affect device reliability.