dc1880a DC1880A LTC2874 Demo Board | Quad IO-Link Master Hot Swap Power Controller and PHY (Requires DC2026) Demonstration circuit 1880A showcases the LTC2874, a quad Hot Swap? controller and PHY suitable for IO-Link? master and other applications. DC1880A operates from an external supply VDD and utilizes the DC590 USB serial controller board to communicate with the LTC2874 using SPI protocol. DC1880A