BU9795AGUW-E2 ROHM

Datasheet Standar d LCD Segment Drivers BU9795AGUW MAX 124 segments (SEG31COM4) Features Key Specifications Integrated RAM for display data (DDRAM) : Supply Voltage Range: +2.5V to +5.5V 31 4bit (Max 124 Segment) Operating Temperature Range: -40C to +85C LCD drive output : Max Segments: 124 Segments 4 Common output, Max 31Segment 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 VBGA048W040 etc. 4.00mm x 4.00mm x 0.90mm Typical Application Circuit VDD COM0 VDD COM1 VLCD COM2 COM3 INHb CSB Controller Segment SD LCD SCL SEG2 SEG3 OSCIN TEST VSS SEG32 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 TSZ02201-0A0A2D300021-002-1-2 2013 ROHM Co., Ltd. All rights reserved. 1/26 TSZ2211114001 20.Mar.2019 Rev.004 BU9795AGUW MAX 124 segments (SEG31COM4) Block Diagrams / Pin Configurations / Pin Descriptions 1 2 3 4 5 6 7 COM0COM3 SEG2SEG32 VDD G (NC) SEG13 SEG15 SEG18 SEG20 SEG22 (NC) LCD voltage generator Common Segment driver driver F SEG11 SEG12 SEG16 SEG17 SEG21 SEG23 SEG24 LCD BIAS SELECTOR E SEG9 SEG10 SEG14 SEG19 SEG25 SEG27 SEG26 Common Blink timing DDRAM counter generator D SEG7 SEG6 SEG8 SEG5 SEG30 SEG28 SEG29 VLCD C SEG4 SEG3 SEG2 CSB COM3 SEG32 SEG31 INHb Command Command Register Data Decoder OSCIN B INHb SD VSS VDD COM1 COM0 OSCILLATOR Power On Reset Serial interface A (NC) TEST2 SCL OSCIN VLCD COM2 (NC) IF FILTER VSS TEST CSB SD SCL Figure 2. Block Diagram Figure 3. Pin Configuration (TOP VIEW) Table 1 Pin Description Pin name I/O Function Input terminal for turn off display INHb I H : turn on display L : turn off display Test input (ROHM use only) TEST I Must be connected to VSS External clock input OSCIN I Ex clock and Int clock can be changed by command. Must be connected to VSS when using internal oscillation circuit. SD I Serial data input SCL I Serial data transfer clock CSB I Chip select : L active VSS GND VDD Power supply VLCD I Power supply for LCD driving SEG2 to 32 O SEGMENT output for LCD driving COM0 to 3 O COMMON output for LCD driving www.rohm.com TSZ02201-0A0A2D300021-002-1-2 2013 ROHM Co., Ltd. All rights reserved. 2/26 TSZ2211115001 20.Mar.2019 Rev.004