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PT6547 V1.2

- 1 -

January, 2006

LCD Driver IC with Key Input Function

PT6547

DESCRIPTION

PT6547 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 300 segments and control

up to 8 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. PT6547 also supports 1/3 to 1/4 duty-1/2

bias and 1/3 to 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

• 1/3 duty and 1/4 duty Drive Techniques

• 1/2 bias and 1/3 bias Drive Techniques

• Up to 228 segments using 1/3 duty and up to 300 segments using 1/4 duty

• Up to 8 General Purpose Output Ports

• Key input function for up to 30 keys [6(O) x 5(I)]

• Serial interface for Clock, Data Input, Data Output, Strobe pins

• Sleep Mode & All segment OFF function

• On-Chip voltage detection type Reset circuit

• Power Supply: 4.5V ~ 6.0V

• /RES pin provided forcibly initializing the internal circuit

• RC Oscillation Circuit

• Available in 100 pins, LQFP Package

APPLICATION

• Electronic Equipment with LCD Display