HDSP-0781is a standard solid state display have a 7.4 mm (0.29 inch) dot matrix character and an on-board IC with data memory latch/decoder and LED driver in a glass/ceramic package. The hermetic HDSP-0791 displays utilize a solder glass frit seal. This numeric device decode positive BCD logic into characters "0-9," a "-" sign, decimal point, and a test pattern.