BU97931FV Datasheet, PDF (1/32 Pages) Rohm – Multifunction LCD Segment Driver

Datasheet
Multifunction LCD Segment Driver
BU97931FV MAX 112 segments (SEG28×COM4)
●Features
 Integrated RAM for display data (DDRAM):
28 x 4 bit (Max 112 Segment)
 LCD drive output:
4 Common output, Max 28 Segment output
 Integrated 1ch LED driver circuit
 Segment/GPO (Max 5port) output mode selectable
 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
 Telephone
 FAX
 Portable equipment (POS, ECR, PDA etc.)
 DSC
 DVC
 Car audio
 Home electrical appliance
 Meter equipment
etc.
●Key Specifications
■ Supply Voltage Range:
+1.8V to +3.6V
■ LCD drive power supply Range: +2.7V to +5.5V
■ Operating Temperature Range: -40°C to +85°C
■ Max Segments:
112 Segments
■ Display Duty:
Static, 1/3, 1/4 selectable
■ Bias:
Static, 1/3
■ Interface:
3wire serial interface
●Package
W (Typ.) x D (Typ.) x H (Max.)
SSOP-B40
13.60mm x 7.80mm x 2.00mm
●Typical Application Circuit
LED/GPO using case
VLED=5.0V
.0V
3.3V
VLCD
LED
VDD
BU97931FV
*Regarding resistor value
Please detect the value according to
input current value (current MAX = 20mA)
SEG27(GPO0) to
SEG23(GPO4
Other
device
VSS
CSB SD SCL CLKIN
SEG0 toSEG22
COM0 ^to COM3
LCD
Input signal from controller
＊ CLKIN
External CLK input terminal
In case being unused, connect to VSS or be opened.
Figure 1. Typical application circuit
○Product structure：Silicon monolithic integrated circuit
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© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111ï½¥14ï½¥001
○This product is not designed for protection against radioactive rays.
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TSZ02201-0A0A2D300070-1-2
10.Apr.2015 Rev.004