DESCRIPTION

PT6555 is a high performance Liquid Crystal Display (LCD) Driver IC utilizing CMOS Technology specially designed with Key Input Function. It can drive up to a maximum of 164 segments and control up to 4 general purpose output ports. It includes a Key Scan Circuit that can support up to 30 key inputs and provides On-Chip Voltage Detection Type Reset Circuit which prevents incorrect display. Display Data can be directly displayed without using any decoder. PT6555 also supports both 1/4 duty-1/2 bias and 1/4 duty-1/3 bias drive techniques. Pin assignments and application circuit are optimized for easy PCB Layout and cost saving advantages.

FEATURES

• CMOS Technology

• PT6555: 48-pin, up to 140 Segment Drivers (4 Com x 35 Seg)

• PT6555-LQ: 64-pin, up to 164 Segment Drivers (4 Com x 41 Seg)

• Up to 4 General Purpose Output Ports

• Key Input Function (Only PT6555-LQ)

• 1/4 Duty-1/2 Bias and 1/4 Duty-1/3 Bias Drive Techniques

• Sleep Mode & All Segment OFF Function

• On-Chip Voltage Detection Type Reset Circuit

• RC Oscillation Circuit

• Power supply voltage: 4.5 to 6V

• COMS/TTL compatible logic input pins

• Available in 64 pins LQFP; 48 pins LQFP Package

APPLICATIONS

• Electronic Equipment with LCD Display