Low Duty LCD Segment Driver For Automotive COG Application

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.

Data Sheet Buy Sample
Data Sheet Buy Sample

Product Detail

Part Number | BU91R63CH-M3BW
Status | Active
Package | Au Bump chip
Unit Quantity | 1360
Minimum Package Quantity | 1360
Packing Type | Tray
RoHS | Yes

Functional Safety:

Category : FS supportive
A product that has been developed for automotive use and is capable of supporting safety analysis with regard to the functional safety.




Segment Element



1/4, 1/3, 1/2, Static


1/3, 1/2

Elements of MUX 1:1


Elements of MUX 1:2


Elements of MUX 1:3


Elements of MUX 1:4


Interface [line serial]


Interface Voltage (Min.)[V]


Interface Voltage (Max.)[V]


Power Supply for LCD (Min.) [V]


Power Supply for LCD (Max.) [V]


LCD Driving Waveform


Operating Temperature (Min.)[°C]


Operating Temperature (Max.)[°C]


Common Standard

AEC-Q100 (Automotive Grade)

Find Similar


  • 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

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