The IN472-3-3 Liquid Crystal Display (LDC) Controller is a perpheral member of the COPSTM family, fabricated using CMOS technology. The IN472-3 drives a multiplexed liquid crystal directly. Data is loaded serially and is held in internal latches. The In472-3 contains an on-chip oscillator and generates all the multi-level waveforms for back-planes and segment outputs on a triplex display. One IN472-3 can drive 36 segments multiplexed as 3 x 12 (41/2 digit display). Two IN472-3 devices can be used together to drive 72 segments (3 x 24) which could be an 81/2 digit display.

• Direct interface to TRIPLEX LCD

• Low power dissipation (100 µW typ.)

• Low cost

• Compatible with all COP400 processors

• Needs no refresh from processor

• On-chip oscillator and latches

• Expandable to longer displays

• Software compatible with COP470 V.F.Display Driver Chip

• Operates from display voltage

• MICROWIRETM compatible serial I/O

• 20-pin Dual-In-Line package