TT1628(SOP 28) /  TT1668(SOP 24)           is an LED Controller driver with key scan function . Ten

segment output lines, four grid output lines, Three segment/grid output lines , display memory,

pulse width control circuit , key scan circuit , 3 wire interface circuit are all incorporated into

a single chip to build a highly reliable peripheral device for a single chip microcomputer.

Features

­  Multiple Display Modes (10 segment X 7 Grid to 13 segment X 4 Grid)

­  Key Scanning (10 x 2 )

­  8 step Dimming adjustment

­ Build-in RC oscillator

­  Serial interface for clock, data Input/ output, strobe pins

­ SOP28 package (TT1628) / SOP24 package(TT1668)

­  CMOS technology

­  Low power consumptio