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)
●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.)
●Applications
Telephone
FAX
Portable equipment (POS, ECR, PDA etc.)
DSC
DVC
Car audio
Home electrical appliance
Meter equipment
etc.
SSOP-B40
13.60mm x 7.80mm x 2.00mm
●Typical Application Circuit
LED/GPO using case
VLED=5.0V
.0V 3.3V
VLCD
VDD
LED
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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TSZ22111･14･001
○This product is not designed for protection against radioactive rays.
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TSZ02201-0A0A2D300070-1-2
10.Apr.2015 Rev.004
