...... Datasheet Low Duty LCD Segment Drivers BU97950AFUV MAX 280 segments (SEG35COM8) General Description Key Specifications BU97950AFUV is a 1/8 or 1/4 duty general-purpose LCD Supply Voltage Range: +2.5V to +6.0V driver that can be used for consumer / battery operated LCD Drive Power Supply Range: +2.5V to +6.0V products and can drive up to 280 LCD Segments. Operating Temperature Range: -40C to +85C It has integrated display RAM for reducing CPU load. Max Segments: 280 Segments Also, it is designed with low power consumption and no Display Duty and Bias: external component needed. 1/4 Duty and 1/3 Bias, It can support LCD contrast adjustment by its EVR 1/8 Duty and 1/4 Bias selectable function. Interface: 2wire serial interface Features Packages W (Typ) x D (Typ) x H (Max) Integrated RAM for Display Data (DDRAM): 35 x 8bit (Max 280 Segment) 1/8 or 1/4 Can be Selected with The Serial Control Data. 1/8 duty drive: Up to 280 segments 1/4 duty drive: Up to 156 segments Integrated Buffer AMP for LCD Driving Integrated Oscillator Circuit No External Components Low Power Consumption Design Independent Power Supply for LCD Driving Integrated Electrical Volume Register (EVR) function TSSOP-C48V 8.1mm x 12.5mm x 1.0mm Applications Metering Home Automation Goods White Goods, Small Appliances Healthcare Products Battery Operated Products etc. Typical Application Circuit VDD VLCD COM0 VDD VLCD COM7 SD SCL Controller Segment LCD SEG0 SEG1 SEG34 VSS Figure 1. Typical Application Circuit Product structureSilicon monolithic integrated circuit This product is not designed for protection against radioactive rays. www.rohm.com TSZ02201-P3P0D301430-1-2 2017 ROHM Co., Ltd. All rights reserved. 1/29 TSZ2211114001 31.Jul.2017 Rev.001 BU97950AFUV MAX 280 segments (SEG35COM8) Block Diagram / Pin Configuration / Pin Description BU97950AFUV (TSSOP-C48V) COM4/SEG35 COM0COM3 SEG0SEG34 COM7/SEG38 VLCD LCD voltage generator Common Segment Driver Driver LCD BIAS SELECTOR Common DDRAM Counter VSS Command Command Data Decoder Register OSCILLATOR Power On Reset Serial Inter Face IF FILTER VDD SCL SDA Figure 2. Block Diagram Figure 3. Pin Configuration (TOP VIEW) www.rohm.com TSZ02201-P3P0D301430-1-2 2017 ROHM Co., Ltd. All rights reserved. 2/29 TSZ2211115001 31.Jul.2017 Rev.001 VDD SDA VLCD SCL VSS SEG21 SEG20 SEG22 SEG19 SEG23 SEG18 SEG24 SEG17 SEG25 SEG16 SEG26 SEG15 SEG27 SEG14 SEG28 SEG13 SEG29 SEG12 SEG30 SEG11 SEG31 SEG10 SEG32 SEG9 SEG33 SEG8 SEG34 SEG7 COM0 SEG6 COM1 SEG5 COM2 SEG4 COM3 COM4 / SEG35 SEG3 COM5 / SEG36 SEG2 COM6 / SEG37 SEG1 COM7 / SEG38 SEG0