UM232R is a new development module from FTDI, which integrates the external EEPROM, clock circuit and USB resistors onto the device, further simplifying USB to serial interface designs. It also adds two new functions compared with its predecessors, effectively making it a “3-in-1” chip for some application areas.
The UM232R is a development module built around FTDI’s FT232RL chip, offering USB‑to‑serial conversion with optional 6 MHz, 12 MHz, 24 MHz or 48 MHz clock output. It integrates the EEPROM, USB resistors and clock circuit, reducing external components and supporting both bus‑powered and self‑powered operation.
The module fits a standard 15 mm wide 24‑pin DIP socket and includes configurable CBUS I/O pins, LED indicators, level converters for 1.8 V‑5 V logic, and a unique FTDIChip‑ID for security dongle applications. Drivers for Windows, macOS and Linux are provided as royalty‑free VCP and D2XX packages.
| Operating temperature range | -40 °C to +85 °C |
|---|---|
| Supply voltage range | 3.3 V – 5.25 V |
| Clock output frequencies | 6 MHz, 12 MHz, 24 MHz, 48 MHz |
| Baud‑rate range | 300 baud – 3 Megabaud |
Each FT232RL device contains a unique FTDIChip‑ID number burnt into the chip, readable over USB and usable as a security dongle to protect software.
The UART and CBUS pins accept 1.8 V to 5 V logic; VIO can be set to 3.3 V for bus‑powered designs or to VCC for 5 V CMOS levels.
Yes, the integrated clock can output 6 MHz, 12 MHz, 24 MHz or 48 MHz signals that can drive microcontrollers or FPGA logic.