Datasheet Standard LCD Segment Driver BU9799KV MAX 200 segments (SEG50COM4) Features Key Specifications Integrated RAM for display data (DDRAM): Supply Voltage Range: +2.5V to +5.5V 50 x 4 bit (Max 200 Segment) LCD drive power supply Range: +2.5V to +5.5V LCD drive output : Operating Temperature Range: -40C to +85C 4 Common output, 50 Segment output Max Segments: 200 Segments Integrated Buffer AMP for LCD driving Display Duty: 1/4 Integrated Oscillator circuit Bias: 1/2, 1/3 selectable No external components Interface: 2wire serial interface Low power consumption design Independent power supply for LCD driving Integrated Electrical volume register (EVR) function Package W (Typ.) x D (Typ.) x H (Max.) Applications Telephone FAX Portable equipment (POS, ECR, PDA etc.) DSC DVC Car audio Home electrical appliances Meter equipment, etc. VQFP64 12.00mm x 12.00mm x 1.60mm Typical Application Circuit VDD VLCD COM0 VDD COM1 VLCD COM2 COM3 SD SCL Controller Segment VDD LCD SEG0 INHb SEG1 OSCIN TEST1 TEST2 TEST3 SEG49 VSS Internal oscillator circuit mode Figure 1. Typical application circuit Product structureSilicon monolithic integrated circuit This product is not designed for protection against radioactive rays. www.rohm.com TSZ02201-0A0A2D300040-1-2 2013 ROHM Co., Ltd. All rights reserved. 1/24 TSZ2211114001 23.Jan.2015 Rev.003DatasheetDatasheet BU9799KV MAX 200 segments (SEG50COM4) Block Diagram / Pin Configuration / Pin Description COM0 COM3 SEG0 SEG49 VLCD LCD voltage generator Segment Common driver driver 49 32 LCD SEG38 SEG21 SEG39 SEG20 BIAS Common Blink timing SEG40 SEG19 DDRAM SELECTOR counter generator SEG41 SEG18 SEG42 SEG17 SEG43 SEG16 SEG44 SEG15 SEG45 SEG14 VSS SEG46 SEG13 INHb SEG47 SEG12 SEG48 SEG11 Command Command OSCIN Data Decoder register SEG49 SEG10 COM0 SEG9 OSCILLATOR COM1 SEG8 Power On Reset Serial interface COM2 SEG7 COM3 SEG6 64 17 VDD IF FILTER VSS TEST3 TEST2 TEST1 SDA SCL Figure 2. Block Diagram Figure 3. Pin Configuration (TOP VIEW) Table 1 Pin Description Terminal Terminal No. I/O Function Input terminal for turning off display INHb 8 I H: turn on display L: turn off display Test input (ROHM use only) TEST1=L: POR circuit enable TEST1 9 I TEST1=H: POR circuit disable, refer to Cautions in Power ON/OFF Test input (ROHM use only) TEST2 10 I Must be connected to VSS Test input (ROHM use only) TEST3 5 I Must be connected to VSS External clock input OSCIN 4 I External clock and Internal clock modes can be selected by command. Must be connected to VSS when use internal oscillation circuit. SDA 7 I Serial data input SCL 6 I Serial data transfer clock VSS 3 GND VDD 2 Power supply VLCD 1 Power supply for LCD driving SEG0-49 11-60 O SEGMENT output for LCD driving COM0-3 61-64 O COMMON output for LCD driving www.rohm.com TSZ02201-0A0A2D300040-1-2 2013 ROHM Co., Ltd. All rights reserved. 2/24 TSZ2211115001 23.Jan.2015 Rev.003 1 16 48 VLCD SEG37 VDD SEG36 VSS SEG35 OSCIN SEG34 TEST3 SEG33 SCL SEG32 SDA SEG31 INHb SEG30 TEST1 SEG29 TEST2 SEG28 SEG0 SEG27 SEG1 SEG26 SEG2 SEG25 SEG3 SEG24 SEG4 SEG23 SEG5 SEG22 33