This schematic block features the FT232RNL, a highly integrated USB 2.0 Full‑Speed (12 Mbps) to serial UART bridge from FTDI. It handles the entire USB protocol on-chip and provides a reliable, transparent virtual com‑port interface. The IC also includes an internal oscillator and EEPROM, making it a compact, low-component solution for embedded USB‑to‑UART conversion.
Housed in a 28‑pin SSOP package, this breakout-style module provides easy access to USB data lines, UART TX and RX, flow‑control signals, and configurable GPIO (CBUS) pins. Its dual-voltage I/O support (from 1.8 V up to 5 V) makes it compatible with a wide range of logic-level domains.
Key Features:
- USB 2.0 Full‑Speed (12 Mbps) slave interface
- Up to 3 Mbaud UART data rate
- Integrated oscillator and EEPROM for custom USB strings and configuration
- Four configurable GPIO / CBUS pins
- Hardware or software handshaking (XON/XOFF) supported
- I/O voltage range: 1.8 V to 5 V
- Virtual COM port support (no USB firmware required)
- Operating temperature: –40 °C to +85 °C
- 28-pin SSOP package, suitable for compact designs
Typical Applications:
- USB‑to-serial converters and debug cables
- Embedded microcontroller USB interface (when MCU lacks USB)
- Data-logging and telemetry systems
- Consumer electronics with UART-based commands
- Industrial control and instrumentation
- Rapid prototyping of USB‑serial wearable or IoT devices
By integrating this Quickboards schematic block, engineers can easily add USB connectivity to embedded systems, eliminate the need for external USB-serial modules, and rely on a proven, production-ready FTDI interface with robust driver support.


