The D1AA series 16-segment digital display units are small, compact size (W 11 x H 22 mm) LED displays capable of displaying 61 unique characters (0 to 9, A to Z, 24 symbols, period). Input logic can be alternated between positive (PNP) and negative (NPN) by simple soldering. The displays accept both parallel and serial data input. Multi-stage connection is possible with multiple units and the displays are available in red and green display models.