The NLSF595 Serial Peripheral Interface (SPI) LED driver from ON Semiconductor is an advanced CMOS device that was originally intended as a segment driver for multiple tri−color LEDs. This article will now reveal a bit more usefulness, the 7/8 segment display driver. This device may be used in conjunction with a microcontroller with only one dedicated line. Some typical applications include: Keyboard illumination, special lighting in handsets and keyboard backlighting, and now a 7/8 segment1 display driver. For more information on multi−color display solutions, please see Application note AND80912.