BU9795AKV-E2 ROHM

Datasheet Standar d LCD Segment Drivers BU9795AKV MAX 140 segments (SEG35COM4) Features Key Specifications Integrated RAM for display data (DDRAM) : Supply Voltage Range: +2.5V to +5.5V 35 4bit (Max 140 Segment) Operating Temperature Range: -40C to +85C LCD drive output : Max Segments: 140 Segments 4 Common output, Max 35Segment output Display Duty: 1/4 Integrated Buffer AMP for LCD driving Bias: 1/2, 1/3 selectable Integrated Oscillator circuit Interface: 3wire serial interface No external components Low power consumption design Packages W (Typ) x D (Typ) x H (Max) Applications Telephone FAX Portable equipment (POS, ECR, PDA etc.) DSC DVC Car audio Home electrical appliance Meter equipment VQFP48C etc. 9.00mm x 9.00mm x 1.60mm Typical Application Circuit VDD VDD COM0 VLCD COM1 COM2 COM3 INHb CSB Controller Segment SD LCD SCL SEG0 SEG1 OSCIN TEST VSS SEG34 Internal oscillator circuit mode Figure 1. Typical application circuit Product structureSilicon monolithic integrated circuit This product has no designed protection against radioactive rays. www.rohm.com TSZ02201-0A0A2D300021-001-1-2 2013 ROHM Co., Ltd. All rights reserved. 1/26 TSZ2211114001 20.Mar.2019 Rev.004 BU9795AKV MAX 140 segments (SEG35COM4) Block Diagrams / Pin Configurations / Pin Descriptions COM0 COM3 SEG0 SEG34 VDD LCD voltage gene rator Common Segment driver driver 37 24 COM1 SEG23 COM2 SEG22 LCD BIAS SELECTOR COM3 SEG21 VLCD SEG20 Common Blink timing DDRAM counter generator VDD SEG19 VSS SEG18 OSCIN SEG17 VLCD CSB SEG16 INHb SCL SEG15 Command Command SD SEG14 register Data Decoder OSCIN TEST SEG13 OSCILLATOR Power On Reset INHb SEG12 Serial inter face 13 48 IF FILTER VSS TEST CSB SD SCL Figure 2. Block Diagram Figure 3. Pin Configuration (TOP VIEW) Table 1 Pin Description Pin name Pin No. I/O Function Input terminal for turn off display INHb 48 I H : turn on display L : turn off display Test input (ROHM use only) TEST 47 I Must be connected to VSS External clock input OSCIN 43 I External clock and Internal clock can be selected by command. Must be connected to VSS when using internal oscillation circuit. SD 46 I Serial data input SCL 45 I Serial data transfer clock CSB 44 I Chip select : L active VSS 42 GND VDD 41 Power supply VLCD 40 Power supply for LCD driving SEG0 to SEG34 1 to 35 O SEGMENT output for LCD driving COM0 to COM3 36 to 39 O COMMON output for LCD driving www.rohm.com TSZ02201-0A0A2D300021-001-1-2 2013 ROHM Co., Ltd. All rights reserved. 2/26 TSZ2211115001 20.Mar.2019 Rev.004 11 12 36 SEG0 COM0 SEG1 SEG34 SEG2 SEG33 SEG3 SEG32 SEG4 SEG31 SEG5 SEG30 SEG6 SEG29 SEG7 SEG28 SEG8 SEG27 SEG9 SEG26 SEG10 SEG25 SEG11 SEG24 25