NJU6543

Preliminary 1/2 1/3 1/4 Duty LCD Driver www.datasheet4u.com ¢ GENERAL NJU6543 DESCRIPTION ¢ PACKAGE OUTLINE NJU6543 is a 1/2 or 1/3,1/4 duty segment type LCD driver. It incorporates 4 common driver circuits and 128 segment driver circuits. NJU6543 can drive maximum 256 segments in 1/2 duty ratio and maximum 384 segments in 1/3 duty ratio and maximum 512 segments in 1/4 duty ratio. In addition, the NJU6543's useful functions meet a wide range of applications. NJU6543 ¢ FEATURES ˜ LCD driving circuit :Max. 128outputs (4 outputs as for general purpose ports) ˜ Programmable Duty Ratio 1/2 Duty Ratio :Driving max. 256 segments 1/3 Duty Ratio :Driving max. 384 segments 1/4 Duty Ratio :Driving max. 512 segments ˜ Programmable Bias Ratio :1/2, 1/3 bias ratio ˜ Electrical Variable Resistance :8-steps ˜ Serial Data Transfer :Shift clock max. 2MHz ˜ Built-in Oscillator :CR oscillation with external resistor and capacitance, or external oscillation signal input ˜ Operating Voltage ˜ C-MOS Technology ˜ Package Outline :3.0V / 5.0V :P-Sub :LQFP144 20mm*20mm t=1.7mm(max) Pin-pitch=0.5mm ¢ BLOCK DIAGRAM COM1 V DD V0 COM4 SEG1 SEG8 SEG9 SEG16 SEG17 SEG24 SEG121 SEG125/P1 SEG128/P4 EVR V1 V2 V3 V SS TEST OSC COM Drivers // Segment Drivers /General Purpose Output Ports // Data Latch Circuit Oscillator Display Data Register CSb SCK SI RSTb Decoder Command Register Power ON Reset Circuit Ver.2007-11-28 -1- NJU6543 ¢ PIN CONFIGURATION SEG104 LQFP144 www.datasheet4u.com Pr...