ROHM BU9798KV Data Handbook/Manual
Summary
This versatile Multifunction LCD Segment Driver is an highly integrated solution designed to power and control complex digital displays. It features up to 108 segment support, integrated RAM, built-in LED drivers, and supports universal serial communication in multiple voltage ranges. The accompanying manual provides detailed technical specifications covering various operating modes and outputs. Essential for manufacturers of PDAs, POS systems, digital meters, telephones, and other portable electronics requiring flexible and reliable display control.
Page 1 Text Content
Datasheet
Multifunction LCD Segment Driver BU97930MUV MAX 108 segments (SEG27×COM4) ●Features ●Key Specifications Integrated RAM for display data (DDRAM): ■ Supply Voltage Range: +1.8V to +3.6V 27 x 4 bit (Max 108 Segment) ■ LCD drive power supply Range: +2.7V to +5.5V LCD drive output: ■ Operating Temperature Range: -40°C to +85°C 4 Common output, Max 27 Segment output ■ Max Segments: 108 Segments Integrated 1ch LED driver circuit ■ Display Duty: Static, 1/3, 1/4 selectable Segment /GPO(Max 4port) output mode selectable ■ Bias: Static, 1/3 Support PWM generation from ext. or internal clock ■ Interface: 3wire serial interface (Resolution: 8bit) Support standby mode ●Package W (Typ.) x D (Typ.) x H (Max.) 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 Telephone FAX Portable equipment (POS, ECR, PDA etc.)
VQFN040V6060
6.00mm x 6.00mm x 1.00mm
DVC Car audio Home electrical appliance Meter equipment etc.
●Typical Application Circuit LED/GPO using case
VLED=5.0V
*Regarding resistor value Please detect the value according to
input current value ( current MAX = 20m A)
Other device
BU97930MUV SEG26(GPO1) to SEG23(GPO4)
VSS SEG0 to SEG22
SD SCL INHb CLKINCSB
COM0 to COM3
CLKIN External CLK input terminal Input signal from controller If not in use, , connect to VSS or open .
Figure 1. Typical application circuit
○Product structure：Silicon monolithic integrated circuit ○This product is not designed for protection against radioactive rays. www.rohm.com © 2013 ROHM Co., Ltd. All rights reserved.
1/28 TSZ02201-0A0A2D300060-1-2
TSZ22111･14･001 8.Jan.2013 Rev.002
Page Summary Contents For ROHM BU9798KV Data Handbook/Manual
Manual Details
| Brand | ROHM |
|---|---|
| Pages | 31 |
| File Size | 797.14 KB |
| Published | June 01, 2026 |
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Frequently Asked Questions
What are the required supply voltage ranges for VDD and VLCD?
The recommended operating range is +1.8V to +3.6V for VDD, and +2.7V to +5.5V for VLCD.
What is the maximum number of segments supported by this driver?
The device supports a maximum of 108 segments (SEG27 × COM4).
Does this product have external components required for operation?
No, the unit has an integrated Power-on-Reset circuit and Oscillator circuit, so no external components are needed.
What is the available selectable frequency for the Blink function?
The blink frequency can be selected from 1.6Hz, 2.0Hz, 2.6Hz, or 4.0Hz.