.... Datasheet Low Duty LCD Segment Driver for Automotive Application BU91799KV-M MAX 200 segments (SEG50COM4) General Description Key Specifications BU91799KV-M is a 1/4 duty general-purpose LCD driver Supply Voltage Range: +2.5V to +6.0V that can be used for automotive applications and can LCD Drive Power Supply Range: +2.5V to +6.0V drive up to 200 LCD Segments. Operating Temperature Range: -40C to +105C It can support operating temperature of up to +105C and Max Segments: 200 Segments qualified for AEC-Q100 Grade2, as required for Display Duty: 1/4 automotive applications. Bias: 1/3 It has integrated display RAM for reducing CPU load. Also, Interface: 2wire Serial Interface it is designed with low power consumption and no external component needed. Special Characteristics ESD(HBM): 2000V Features Latch-up Current: 100mA (Note) AEC-Q100 Qualified Integrated RAM for Display Data (DDRAM): Package W (Typ) x D (Typ) x H (Max) 50 x 4 bit (Max 200 Segment) LCD Drive Output : 4 Common Output, Max 50 Segment Output 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 (Note) Grade 2 VQFP64 Applications 12.00mm x 12.00mm x 1.60mm Instrument Clusters Climate Controls Car Audios / Radios Metering White Goods Healthcare Products Battery Operated Applications etc. Typical Application Circuit VDD VLCD COM0 VDD COM1 VLCD C > 0.1F COM2 COM3 SDA SCL Controller Segment VDD LCD SEG0 INHb SEG1 OSCIN TEST1 Insert Capacitors between VDD / VSS and VLCD / VSS SEG49 VSS Internal Clock Mode Figure 1. Typical Application Circuit Product structureSilicon monolithic integrated circuit This product is not designed for protection against radioactive rays. www.rohm.com TSZ02201-0P4P0D301050-1-2 2015 ROHM Co., Ltd. All rights reserved. 1/27 TSZ22111 14 001 12.Jun.2017 Rev.002 BU91799KV-M MAX 200 segments (SEG50COM4) Block Diagram / Pin Configuration / Pin Description COM 0 COM 3 SEG 0 SEG 49 VLCD LCD voltage generator Common Segment Driver Driver 49 32 SEG38 SEG21 SEG39 SEG20 SEG40 SEG19 SEG41 SEG18 LCD SEG42 SEG17 BIAS Common Blink Timing SEG43 SEG16 DDRAM SELECTOR Generator Counter SEG44 SEG15 SEG45 SEG14 SEG46 SEG13 SEG47 SEG12 VSS SEG48 SEG11 INHb SEG49 SEG10 COM0 SEG9 Command Command OSCIN Data Decoder Register COM1 SEG8 COM2 SEG7 OSCILLATOR Power On Reset Serial Interface COM3 SEG6 64 17 VDD IF FILTER VSS TEST 1 SDA SCL Figure 2. Block Diagram Figure 3. Pin Configuration (TOP VIEW) Table 1 Pin Description Handling Pin Name Pin No. I/O Function when unused Input terminal for display control INHb 8 I VDD: Display enable VDD VSS: Display disenable POR enable setting (Note) TEST1 9 I VDD: POR disenable VSS VSS: POR enable NC 10 - Non connection OPEN NC 5 - Non connection OPEN External clock input OSCIN 4 I External clock and Internal clock modes can be selected by command VSS Must be connected to VSS when using internal oscillator. SDA 7 I/O Serial data in-out terminal - SCL 6 I Serial clock terminal - VSS 3 - Ground - VDD 2 - Power supply - VLCD 1 - Power supply for LCD driving - SEG0 to 11 to 60 O SEGMENT output for LCD driving OPEN SEG49 COM0 to 61 to 64 O COMMON output for LCD driving OPEN COM3 (Note) This function is guaranteed by design, not tested in production process. Software Reset is necessary to initialize IC in case of TEST1=VDD. www.rohm.com TSZ02201-0P4P0D301050-1-2 2015 ROHM Co., Ltd. All rights reserved. 2/27 TSZ22111 15 001 12.Jun.2017 Rev.002 11 1616 48 VLCD SEG37 VDD SEG36 VSS SEG35 OSCIN SEG34 NC SEG33 SCL SEG32 SDA SEG31 INHb SEG30 TEST1 SEG29 NC SEG28 SEG0 SEG27 SEG1 SEG26 SEG2 SEG25 SEG3 SEG24 SEG4 SEG23 SEG5 SEG22 33