The FTDI FT232 USB to Serial converter is highly regarded for its broad driver support across various operating systems. The TTL-232RG series, featuring the TTL-232RG-VREG3V3-WE cable, offers a convenient solution to connect USB ports to serial devices with ease.

To understand the functionality of the cable, let's refer to the accompanying figure. The USB plug connects to the workstation, while a set of cables allows for easy connection to a range of serial hardware devices.

TTL-232RG-VREG3V3-WE – FTDI USB to Serial converter with 3.3V levels

FTDI's extensive usage in the industry ensures that most software developers are familiar with its programming patterns. The figure demonstrates support for both the VCP and D2xx APIs on the host side.

TTL-232RG-VREG3V3-WE – FTDI USB to Serial converter

Flexible Voltage Level Selection

In modern embedded systems, different signal voltage levels are utilized. This poses a challenge for USB to Serial converters, as mismatched voltage levels can result in current imbalances that may damage components. The TTL-232RG series addresses this concern by offering various pre-determined voltage options. The VREG3V3 version supports a 3.3V signal level, while the VREG1V8 version operates at 1.8V. Additionally, a 5V version is available, and the TTL-232RG-VIPWE offers externally adjustable output voltage for added flexibility. The maximum current output capability varies depending on the selected model, with the 1V8 version supporting up to 100mA and the 5V version reaching 450mA.

TTL-232RG-VREG3V3 Pricing and Availability

The pricing analysis of this development tool reveals a single unit price ranging from 25 to 35 EUR. Currently, the part is readily available, and volume discounts can bring the price down to around 22 EUR for quantities of 100(Price correct as of the date of publication). It's worth noting that FTDI faced challenges during the recent chip crisis, which impacted the availability of their products. The datasheet includes the schematics of the USB to Serial converter, facilitating easy integration into products that benefit from an integrated USB port. For customized cable requirements, FTDI can be contacted through their distributors.


Although the TTL-232RG-VREG3V3 may not be the most budget-friendly USB-to-Serial solution, its plug-and-play nature offers significant convenience. Eliminating the need for MicroUSB cables and jump wires saves valuable time, especially for less technically inclined users. Moreover, the wide driver support ensures seamless operation across different platforms. The TTL-232RG-VREG3V3 is a reliable and versatile choice for various applications, ready to deliver efficient USB to Serial conversion wherever and whenever needed.