LC79451KB is controller and driver IC for the electronic paper display (EPD). It can realize low supply voltage and low power consumption. It supports SPI and I
C interface. It is equipped with waveform generator, oscillator, charge-pump and 128 segment drivers.

• Logic power supply voltage (VDD) : +1.6V to +3.6V
• Analog power supply voltage (VDD2) : +1.8V to +3.6V
• Interface : SPI or I
• C
• Operating frequency : 400kHz max (I
• C) /10MHz max (SPI)
• Standby current : 1µA max
• Operating current : 30µA typ (no load, charge-pump frequency 1kHz)
• Number of segment drive output : 128
• Level of segment drive output : 3 level (-15V/0V/+15V)
• Waveform output : Internal waveform generator
• Internal charge-pump : +15V/-15V
• Frequency of CR oscillator : 32kHz +/-3%
• Automatic low power function :
• Automatic start and stop of internal circuit with the waveform output
• Automatic shift to the lower charge-pump frequency with finish of the waveform output
• Gold bump chip : X = 6.55mm, Y = 1.43mm