CP2104-F03-GMR

The CP2104 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 CP2104 includes a USB 2.0 full-speed function controller, USB transceiver, oscillator, one-time programmable ROM, and asynchronous serial data bus (UART) with full modem control signals in a compact 4x4 mm QFN-24 package (sometimes called “MLF” or “MLP”). No other external USB components are required. The on-chip one-time programmable ROM may be used to customize the USB Vendor ID, Product ID, Product Description String, Power Descriptor, Device Release Number, Device Serial Number, and GPIO configuration as desired for OEM applications. Royalty-free Virtual COM Port (VCP) device drivers provided by Silicon Labs allow a CP2104-based product to appear as a COM port to PC applications. The CP2104 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 four 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 V10 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 CP2104. Direct access driver support is available through the Silicon Labs USBXpress driver set.

Applications

• Upgrade of RS-232 legacy devices to USB
• Upgrade of RS-485 legacy devices to USB
• Cellular phone USB interface cable
• PDA USB interface cable
• USB to RS-232 serial adapter

Key features

• Integrated USB transceiver; no external resistors required
• Integrated clock; no external crystal required
• Integrated 1024-Byte One-Time Programmable ROM for customizable product information
• On-chip power-on reset circuit
• On-chip voltage regulator: 3.45 V output
• USB Specification 2.0 compliant; full-speed (12 Mbps)
• USB Suspend states supported via SUSPEND and SUSPEND pins
• All handshaking and modem interface signals
• Data formats supported: Data bits: 5, 6, 7, and 8; Stop bits: 1, 1.5, and 2; Parity: odd, even, mark, space, no parity
• Baud rates: 300 bps to 2 Mbits
• 576 byte receive buffer; 576 byte transmit buffer
• Hardware or X-ON/X-OFF handshaking supported
• Four GPIO signals for status and control
• Configurable I/O (1.8 V to VDD) using V10 pin
• Configurable I/O (VDD to 5 V) using external pull-up
• RS-485 mode with bus transceiver control
• Works with Existing COM Port PC Applications
• Royalty-Free Distribution License
• Windows 7/Vista/XP/Server 2003/2000
• Mac OS-X
• Linux
• Royalty-Free Distribution License
• Windows 7/Vista/XP/Server 2003/2000
• Windows CE 6.0, 5.0, and 4.2
• Self-powered: 3.0 to 3.6 V
• USB bus powered: 4.0 to 5.25 V
• I/O voltage: 1.8 V to VDD
• RoHS-compliant 24-pin QFN (4x4 mm)
• Temperature Range: -40 to +85 °C