5 6 3.3 V 2 CP2103 SINGLE-CHIP USB TO UART BRIDGE Single-Chip USB to UART Data Transfer Virtual COM Port Device Drivers Integrated USB transceiver no external resistors Works with Existing COM Port PC Applications required Royalty-Free Distribution License Integrated clock no external crystal required Windows 7 /Vista /XP /Server 2003 /2000 Integrated 1024-Byte EEPROM for vendor ID, product Mac OS-X ID, serial number, power descriptor, release number, Linux and product description strings On-chip power-on reset circuit USBXpress Direct Driver Support On-chip voltage regulator: 3.3 V output Royalty-Free Distribution License Windows 7/Vista/XP/Server 2003/2000 USB Function Controller Windows CE 6.0, 5.0, and 4.2 USB Specification 2.0 compliant full-speed (12 Mbps) USB suspend states supported via SUSPEND pins Example Applications Upgrade of RS-232 legacy devices to USB Asynchronous Serial Data BUS (UART) Upgrade of RS-485 legacy devices to USB All handshaking and modem interface signals Cellular phone USB interface cable Data formats supported: PDA USB interface cable - Data bits: 5, 6, 7, and 8 USB to RS-232 serial adapter - Stop bits: 1, 1.5, and 2 - Parity: odd, even, mark, space, no parity Supply Voltage Baud rates: 300 bps to 1 Mbps Self-powered: 3.0 to 3.6 V 576 Byte receive buffer 640 byte transmit buffer USB bus powered: 4.0 to 5.25 V Hardware or X-On/X-Off handshaking supported I/O voltage: 1.8 V to V Four GPIO signals for status and control DD Configurable I/O (1.8 V to V ) using V pin DD IO Package Configurable I/O (V to 5 V) using external pull-up DD Lead free 28-pin QFN (5x5 mm) RS-485 mode with bus transceiver control Ordering Part Number CP2103-GM Temperature Range: 40 to +85 C CP2103 GPIO 0 5 VIO External (to external circuitry GPIO 1 voltage supply for status and or direct GPIO 2 control) connection 4 to VDD GPIO 3 7 Voltage REGIN IN Regulator 9 RST OUT (to external circuitry 12 for USB suspend SUSPEND states) 6 VDD 11 SUSPEND GND 1 RI 48 MHz 28 Oscillator DCD 8 VBUS USB 27 DTR CONNECTOR External RS-232 26 DSR 1 transceiver or VBUS 4 UART D- UART circuitry 2 USB USB Function 25 TXD D- 3 3 Transceiver Controller D+ D+ 24 RXD 4 GND 640B 576B 1024B 23 TX RX RTS EEPROM Buffer Buffer 22 CTS Figure 1. Example System Diagram Rev. 1.0 12/10 Copyright 2010 by Silicon Laboratories CP2103 19 18 17 16CP2103 2 Rev. 1.0