Static 1/2, 1/3, 1/4 Duty LCD Driver

Manufacturer's part number :


Manufacturer New Japan Radio

New Japan Radio

Description :

The NJU6541A is a Static or 1/2, 1/3, 1/4 duty segment type LCD driver. It incorporates 4 common driver circuits and 120 segment driver circuits. The NJU6541A can drive maximum 480 segments in 1/4 duty ratio, and can use I2C F/S mode.

In addition, the NJU6541A's useful functions meet a wide range of applications.

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  • LCD driving circuit (Max. 120outputs (4 outputs as for general purpose ports))
  • Programmable Duty Ratio (
  • Static :Driving max. 120 segments1/2 Duty Ratio :Driving max. 240 segments1/3 Duty Ratio :Driving max. 360 segments1/4 Duty Ratio :Driving max. 480 segments)
  • General Purpose Port (Driving max 4outputs (SEG1-SEG4:4outputs as for general purpose ports))
  • Key Scan Function (Max 30Key(5-out x 6-in matrix))
  • Programmable Bias Ratio (1/2, 1/3 bias ratio (Static:1/1))
  • I2C-bus Interface (F/S mode slave address 0111_000*(*: Read/ Write mode distinction: 0=write, 1=read))
  • Oscillator (CR oscillation with external resistor and capacitance, or external oscillation signal input)
  • Operating Wave Form (A wave form, B wave form)
  • Electrical Variable Resistance (8-steps)
  • Power ON Initialize Circuit On-Chip
  • Useful Instruction Set (Duty select, Bias select, Wave form select, Oscillation select, Segment or general purpose ports select, Segment or Key scan output select, E.V.R select, Display ON/OFF, Key scan ON/OFF)
  • Operating Voltage (3.0V / 5.0V)
  • C-MOS Technology (P-Sub)
  • Package Outline (LQFP144-L1 20mmx20mm t=1.7mm(max.) Pin-pitch=0.5mm)
Features Similar products
Drives Number of Segments 120  

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On-chip Oscillator Yes  
Control Lines Required Yes  
Operating Temperature (°C) -40 to 105  
Package LQFP-144