System Overview

The CP2102/9 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 CP2102/9 includes a USB 2.0 full speed function controller, USB transceiver, oscillator, EEPROM or EPROM, 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 programmable ROM 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 programmable ROM is programmed on-board via the USB, allowing the programming step to be easily integrated into the product manufacturing and testing process.

Single-Chip USB to UART Data Transfer

- Integrated USB transceiver; no external resistors

required

- Integrated clock; no external crystal required

- Internal 1024-byte programmable ROM for vendor ID,

product ID, serial number, power descriptor, release

number, and product description strings

- EEPROM (CP2102)

- EPROM (One-time programmable) (CP2109)

- On-chip power-on reset circuit

- On-chip voltage regulator

- 3.3 V output (CP2102)

- 3.45 V output (CP2109)

- 100 pin and software compatible with CP2101

USB Function Controller

- USB Specification 2.0 compliant; full-speed (12 Mbps)

- USB suspend states supported via SUSPEND pins

Asynchronous Serial Data BUS (UART)

- 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 1 Mbps

- 576 Byte receive buffer; 640 byte transmit buffer

- Hardware or X-On/X-Off handshaking supported

- Event character support

- Line break transmission

Virtual COM Port Device Drivers

- Works with existing COM port PC Applications

- Royalty-free distribution license

- Windows 8/7/Vista/Server 2003/XP/2000

- Mac OS-X/OS-9

- Linux

USBXpress™ Direct Driver Support

- Royalty-Free Distribution License

- Windows 7/Vista/XP/Server 2003/2000

- Windows CE

Example Applications

- Upgrade of RS-232 legacy devices to USB

- Cellular phone USB interface cable

- USB interface cable

- USB to RS-232 serial adapter

Supply Voltage

- Self-powered: 3.0 to 3.6 V

- USB bus powered: 4.0 to 5.25 V

Package

- RoHS-compliant 28-pin QFN (5x5 mm)

Temperature Range: –40 to +85 °C