Datasheet Low Duty LCD Segment Driver for Automotive Application BU91795MUF-M MAX 48 Segments (SEG12COM4) Key Specifications General Description Supply Voltage Range: +2.5V to +6.0V BU91795MUF-M is a 1/4 duty general-purpose LCD Operating Temperature Range: -40C to +105C driver that can be used for automotive applications and Max Segments: 48Segments can drive up to 48 LCD Segments. Display Duty: 1/4 It can support operating temperature of up to +105C and Bias: 1/3 qualified for AEC-Q100 Grade2, as required for Interface: 2wire Serial Interface automotive applications. Wettable flank QFN package is suitable for small Special Characteristics footprint applications and provides significant ESD(HBM): 2000V advantages in inspectability and solder joint reliability. Latch-up current: 100mA Features (Note) Package W (Typ) x D (Typ) x H (Max) AEC-Q100 Qualified Integrated RAM for Display Data (DDRAM): 12 x 4 bit (Max 48 Segment) LCD Drive Output: 4 Common Output, Max 12 Segment Output Integrated Buffer AMP for LCD Driving Integrated Oscillator Circuit No External Components Low Power Consumption Design (Note) Grade 2 Applications Instrument Clusters VQFN24FV4040 Climate Controls 4.0mm x 4.0mm x 1.0mm Car Audios / Radios Metering White Goods Healthcare Products Battery Operated Applications etc. Typical Application Circuit Internal Clock Mode Figure 1. Typical Application Circuit Product structure:Silicon monolithic integrated circuit This product has no designed protection against radioactive rays. www.rohm.com TSZ02201-0P4P0D3P01010-1-2 2017 ROHM Co., Ltd. All rights reserved. 1/26 TSZ2211114001 08.Mar.2017 Rev.001 Datasheet BU91795MUF-M MAX 48 segments (SEG12COM4) Block Diagram COM0COM3 SEG0SEG11 VDD LCD Voltage Generator Common Segment Driver Driver LCD Bias Selector Common Blink Timing DDRAM Counter Generator VLCD Command Command Data Decoder Register OSCIN Oscillator Power On Reset Serial Interface IF Filter VSS TEST2 TEST1 SDA SCL Figure 2. Block Diagram Pin Configuration (TOP VIEW) COM3 19 12 SEG8 SEG7 VLCD 20 11 SEG6 VDD 21 10 EXT-PAD VSS 22 9 SEG5 SEG4 TEST1 23 8 SEG3 TEST2 24 7 Figure 3. Pin Configuration (TOP VIEW) www.rohm.com TSZ02201-0P4P0D3P01010-1-2 2017 ROHM Co., Ltd. All rights reserved. 2/26 TSZ2211115001 08.Mar.2017 Rev.001 OSCIN 1 18 COM2 SCL 2 17 COM1 SDA 3 16 COM0 SEG0 4 15 SEG11 SEG1 5 14 SEG10 SEG2 6 13 SEG9