Low Duty LCD Segment Driver For Automotive COG Application - BU91R63CH-M3BW (New)

BU91R63CH-M3BW is a 1/4, 1/3, 1/2 duty or static COG type LCD driver that can be used for automotive applications and can drive up to 176 LCD segments. This product can support VA LCD displays, which has better optical performance with higher LCD voltage driving and higher frame frequency driving. It can support operating temperature of up to +105°C and compliant for AEC-Q100, as required for Automotive Application. It has integrated display RAM for reducing CPU load. Also, it is designed with low power consumption and no external component needed. It includes read function for display RAM and command register, wherein it is possible to detect malfunction due to noise. Also a defective mounting of COG can easily be controlled by using pins to measure ITO resistance. It can support LCD contrast adjustment by its EVR function.

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Part Number
Unit Quantity
Minimum Package Quantity
Packing Type
BU91R63CH-M3BW Active Au BUMP chip 16320 16320 Tray Yes
Grade Automotive
Segment Element 176
Duty 1/4, 1/3, 1/2, Static
Bias 1/3, 1/2
Elements of MUX 1:1 44
Elements of MUX 1:2 88
Elements of MUX 1:3 132
Elements of MUX 1:4 176
Interface [line serial] 2wire
Interface Voltage (Min.)[V] 2.7
Interface Voltage (Max.)[V] 6.0
LCD Driving Waveform Line/Frame
Operating Temperature (Min.)[°C] -40
Operating Temperature (Max.)[°C] 105
    • 1/4, 1/3, 1/2 duty or static setting selectable.
      1/4 duty driving: Max 176 segments
      1/3 duty driving: Max 132 segments
      1/2 duty driving: Max 88 segments
      1/1 duty driving: Max 44 segments
    • Integrated display data RAM: 44 x 4bit
    • Support wide range of LCD operation voltage from 2.7V to 6.0V, which can support TN LCD and VA LCD display.
    • Power supply for Interface: 2.7V to 6.0V
    • Integrated LCD voltage driving circuit
    • Support Read Register and Display RAM Function
    • Support ITO Resistance Measurement
    • Integrated oscillation circuit for LCD frame frequency
    • Line or Frame inversion driving selectable
    • Support 2 wire serial interface
    • Integrated EVR function to adjust LCD contrast
    • Integrated power on reset circuit
    • No external components required
    • Low power consumption design
    • Support up to +105C operation, AEC-Q100 compliant
ROHM Semiconductor reserves the right to change the specifications at any time.
Technical Data
Application Note

Thermal Resistance