Silicon Labs USB to UART Bridge, USB 2.0, QFN-EP, 28 Pins

Silicon Labs USB to UART Bridge is a USB 2.0 full-speed (12 Mbps) bridge IC for adding USB connectivity to embedded designs, supporting the transition from legacy serial ports to modern USB connections.

Overview

The bridge integrates the USB transceiver, clock and a 1024-byte EEPROM, so no external resistors or crystal are required. This reduces component count and board space. It is housed in a compact QFN-EP package with 28 pins and operates over an industrial temperature range from -40°C to 85°C.

Key Features

• Integrated USB transceiver with no external resistors required
• Integrated clock with no external crystal required
• Integrated 1024-byte EEPROM
• On-chip power-on reset circuit
• On-chip voltage regulator with 3.3V output
• Hardware and X-On/X-Off handshaking support
• Event character support and line break transmission

Data Handling

The device supports baud rates from 300 bps to 1 Mbps and includes a 576-byte receive buffer and a 640-byte transmit buffer to handle data bursts. All handshaking and modem interface signals are provided for full UART compatibility, and USB suspend states are supported via SUSPEND pins.

Power and Specifications

The supply voltage range is 3V to 3.6V. The device is a 1-port device with a full-speed USB 2.0 interface, and its on-chip 3.3V output regulator simplifies power management.

Dimensions

Width: 3.3, Depth: 1.5, Height: 4.3. Weight: 0.114 gm.