Low Duty LCD Segment Drivers for Automotive applications - BU97540KV-M

BU97540KV-M is a 1/5, 1/4, 1/3duty or Static general-purpose LCD driver that can be used for automotive applications and can drive up to 335 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 control up to 9 general-purpose outputs / PWM output ports for LED backlighting and LED button illumination realizing less flicker by various frequency setting function. It can also support a key scan function that detects a maximum of 30 key inputs to reduce PCB wiring and to minimize microcontroller size and cost.It can support LCD contrast adjustment by its EVR function and TTL compatible input interface is also available, these are well-suited for wide-voltage range of MCUs.It can use 2chip connection and can display up to 680 LCD Segments with Master/Slave function.

Part number
Unit Quantity
Minimum Package Quantity
Packing Type
Constitution Materials List
BU97540KV-ME2 Active VQFP80 1000 1000 Taping inquiry Yes
Grade Automotive
Segment Element 335
Duty 1/5, 1/4, 1/3, Static
Bias 1/3, 1/2
Elements of MUX 1:1 68
Elements of MUX 1:3 204
Elements of MUX 1:4 272
Elements of MUX 1:5 335
Interface [line serial] 3wire+KEYOUT
Interface Voltage (Min.)[V] 2.7
Interface Voltage (Max.)[V] 6.0
Max GPO [port] 9
Max KEYSCAN [Key] 30
TTL input Support Yes
LCD Driving Waveform Line/Frame
Operating Temperature (Min.)[°C] -40
Operating Temperature (Max.)[°C] 85
    • 1/5, 1/4, 1/3duty or Static setting selectable
      1/5duty: Max 335 segments, 1/4duty: Max 272 segments
      1/3duty: Max 204 segments, Static: Max 68 segments
    • Support Master/Slave 2chip connection
      1/5duty: Max 680 segments, 1/4duty: Max 548 segments
      1/3duty: Max 411 segments, Static: Max 137 segments
    • 1/3 or 1/2 bias setting selectable
    • Support wide range of operation voltage from 2.7V to 6.0V,
      which can support TN LCD and VA LCD display.
    • Integrated LCD voltage driving circuit
    • Integrated oscillation circuit for LCD frame frequency
    • Line or Frame inversion driving selectable
    • Integrated 9ch general purpose outputs/ PWM outputs (SEG selectable)
    • Support 256 step PWM function to realize backlight/ button LED illumination
    • Support LCD frame frequency from 49Hz to 391Hz, total 16setting
    • Support PWM frequency from 146Hz to 4.69KHz, total 17setting
    • Support 3 wire serial interface + KEYOUT
    • Support TTL level input to connect 3.3V MCU directly
    • Support Max 30 key input detection (SEG selectable)
    • Integrated EVR function to adjust LCD contrast
    • Integrated voltage detected type power on reset circuit
    • No external components required
    • Low power consumption design
    • Qualified AEC-Q100 Grade3
Technical Data
Application Note

Thermal Resistance