The FT122 series from Future Technology Devices International Limited is a lineup of USB controllers that offer a unique twist by supporting both USB and parallel bus interfaces in a compact 28-pin package. These controllers are particularly useful in scenarios where legacy parallel interface support is still required alongside modern USB connectivity. For instance, if you're working on a device that needs to interface with printers or scanners that use parallel ports, the FT122 series provides an efficient solution without the need for additional hardware.

One practical observation is that these controllers excel in embedded systems where space is at a premium and legacy compatibility is essential. Engineers tend to reach for this when they need to integrate older peripherals into a modern USB-based system without compromising on form factor. Another benefit is their ease of use; they come with comprehensive libraries and APIs that simplify the development process, making them accessible even to those who might not have extensive experience with USB or parallel interface design.

If you're working on a project that requires bridging the gap between old and new technologies, the FT122 series is definitely worth considering. Its compact size and dual interface capability make it a versatile choice for a wide range of applications, from industrial control systems to consumer electronics.