Datasheet MAX 112 segments (SEG28COM4) Multifunction LCD Segment Driver BU97931FV-LB This is the product guarantees long time support in Industrial market. Key Specifications Supply Voltage Range: +1.8V to +3.6V Features LCD Drive Power Supply Range: +2.7V to +5.5V Long Time Support Product for Industrial Equipment Operating Temperature Range: -40C to +85C Integrated RAM for display data (DDRAM): Max Segments: 112 Segments 28 x 4 bit (Max 112 Segment) Display Duty: Static, 1/3, 1/4 Selectable LCD Drive Output: Bias: Static, 1/3 4 Common Output, Max 28 Segment Output Interface: 3Wire Serial Interface Integrated 1ch LED Driver Circuit Segment/GPO (Max 5port) Output Mode Selectable Package W (Typ) x D (Typ) x H (Max) Support PWM Generation from ext. or Internal Clock (Resolution: 8bit) Support Standby Mode Integrated Power-on-Reset Circuit (POR) Integrated Oscillator Circuit No External Component Low Power Consumption Design Independent Power Supply for LCD Driving Support Blink Function (Blink frequency 1.6, 2.0, 2.6, 4.0Hz selectable) Applications SSOP-B40 Industrial Equipment 13.60mm x 7.80mm x 2.00mm Telephone FAX Portable Equipment (POS, ECR, PDA etc.) DSC DVC Car audio Home Electrical Appliance Meter Equipment Etc. VLED=5.0V Typical Application Circuit LED/GPO using case Regarding resistor value Please detect the value according to input current value ( current MAX = 20mA) VLCD LED VDD Other SEG27(GPO0) to device SEG23(GPO4) BU97931 FV-LB .0 V 3. 3V SEG0 toSEG22 VSS CLKIN CSB SD SCL LCD to COM0 COM3 CLKIN External CLK input terminal Input signal from controller In case being unused, connect to VSS or be opened . Figure 1. Typical application circuit Product structureSilicon monolithic integrated circuit This product has no designed protection against radioactive rays. www.rohm.com TSZ02201-0P4P0D300490-1-2 2013 ROHM Co., Ltd. All rights reserved. 1/29 TSZ2211114001 26.Feb.2014 Rev.00240 21 1 20 DatasheetDatasheet BU97931FV-LB MAX 112 segments (SEG28COM4) Block Diagram / Pin Configuration / Pin Description SEG5 SEG4 SEG6 SEG3 COM0COM3 SEG022 LED SEG23...27 SEG7 SEG2 VLC D SEG8 SEG1 Common Segment Segment LED LCD Voltage Driver Driver Driver/GPO Driver Generator SEG9 SEG0 COM3 SEG10 GPO LCD Controller COM2 SEG11 BIAS SELECTOR SEG12 COM1 Blink Common DDRAM Timing PWM COM0 SEG13 Counter Generator GPO Data Latch Generator SEG14 VLCD SEG15 CLKIN VSS VDD SEG16 Command Resister SEG17 SD Data Decoder CLKIN OSCILLATOR Power On SEG18 SCL Reset Serial Interface SEG19 CSB VDD SEG20 VSS IF FILTER VSS SEG21 LED SEG22 SEG27 CSB SD SCL SEG23 SEG26 SEG24 SEG25 Figure 2. Block Diagram Figure 3. Pin Configuration (TOP VIEW) Table 1 Pin Description Terminal Unused Terminal I/O Function Number Case CSB 26 I - Chip select: active SCL 27 I - Serial data transfer clock SD 28 I - Input serial data VDD 29 - - Power supply for LOGIC External clock input terminal (for display/PWM using selectable) CLKIN 30 I OPEN / VSS Support Hi-Z input mode at internal clock mode VSS 25 - - GND VLCD 31 - - Power supply for LCD COM0 to 3 32 to 35 O OPEN COMMON output for LCD 36 to 40 SEG0 to 22 O OPEN SEGMENT output for LCD 1 to 18 SEG23 to 27 19 to 23 O OPEN SEGMENT output for LCD/GPO LED 24 O OPEN LED driver output www.rohm.com TSZ02201-0P4P0D300490-1-2 2013 ROHM Co., Ltd. All rights reserved. 2/29 TSZ2211115001 26.Feb.2014 Rev.002