BU9796AFS-E2 ROHM

Datasheet Standard LCD Segment Driver BU9796Axxx Series MAX 80 segments (SEG20COM4) Features Key Specifications Integrated RAM for display data (DDRAM): Supply Voltage Range: +2.5V to +5.5V 20 x 4 bit (Max 80 Segment) Operating Temperature Range: -40C to +85C LCD drive output : Max Segments: 4 Common output, Max 20 Segment output BU9796AFS 80 Segments Integrated Buffer AMP for LCD driving BU9796AMUV 48 Segments Integrated Oscillator circuit Display Duty: 1/4 No external components Bias: 1/2, 1/3 selectable Low power consumption design Interface: 2wire serial interface Package 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 VQFN024V4040 etc. 4.00mm x 4.00mm x 1.00mm SSOP-A32 13.60mm x 7.80mm x 2.01mm Typical Application Circuit VDD BU9796AFS VDD COM0 VLCD COM1 COM2 COM3 SDA Segment Controller SCL LCD SEG0 SEG1 OSCIN TEST1 TEST2 VSS SEG19 Using internal oscillator Figure 1. Typical application circuit Product structureSilicon monolithic integrated circuit This product is not designed protection against radioactive rays. www.rohm.com TSZ02201-0A2A0D300100-1-2 2013 ROHM Co., Ltd. All rights reserved. 1/28 TSZ2211114001 13.Jun.2014 Rev.003 Datasheet BU9796Axxx Series MAX 80 segments (SEG20COM4) Block Diagram / Pin Configuration / Pin Description BU9796AFS COM0COM3 SEG0 SEG19 VDD LCD voltage gene rator Common Segment driver driver LCD BIAS SELECTOR Common Blink timing DDRAM counter generator VLCD Command Command OSCIN register Data Decoder OSCILLATOR Power On Reset Serial interface IF FILTER VSS SDA SCL Figure 2. Block Diagram Figure 3. Pin Configuration (TOP VIEW) Table 1 Pin Description Terminal Terminal No. I/O Function Test input (ROHM use only) TEST1 26 I Must be connect to VSS Test input (ROHM use only) TEST2=L: POR circuit enable TEST2 27 I TEST2=H: POR circuit disenable, refer to Cautions in Power ON/OFF External clock input OSCIN 28 I External clock and Internal clock can be selected by command. Must be connect to VSS when use internal oscillation circuit. SDA 30 I/O serial data in-out terminal SCL 29 I serial data transfer clock VSS 25 GND VDD 24 Power supply VLCD 23 Power supply for LCD driving 31,32 SEG0-19 O SEGMENT output for LCD driving 1-18 COM0-3 19-22 O COMMON output for LCD driving www.rohm.com TSZ02201-0A2A0D300100-1-2 2013 ROHM Co., Ltd. All rights reserved. 2/28 TSZ2211115001 13.Jun.2014 Rev.003 SEG 2 SEG 1 SEG 3 SEG0 SEG 4 SDA SEG 5 SCL SEG 6 OSCIN SEG 7 TEST 2 SEG 8 TEST 1 SEG 9 VSS SEG 10 VDD SEG 11 VLCD SEG 12 COM 3 SEG 13 COM 2 SEG 14 COM 1 SEG 15 COM 0 SEG 16 SEG 19 SEG 17 SEG 18