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STRUCTURE
PRODUCT NAME
FUNCTION
Silicon monolithic integrated circuit
BU9798GUW
LCD control driver for segment type LCD display
○ LCD drive output : Common output : 4, Segment output : 49
○ built-in Display data RAM (DDRAM) : RAM: 49*4 =196 bit
○ 3-wire Serial interface(SD, SCL, CSB )
FEATURE
○ built-in Oscillator circuit
○ built-in LCD Voltage Generator circuit: support 1/3 Bias, 1/3 or 1/4 Duty, 1/1 Bias, 1/1Duty (Static Driving)
Built-in Buffer AMP, Built-in regulator (3.2, 3.3, 3.4, 4.4, 4.5, 4.6, 5.0V)
○ Support Split Supply for Logic (VDD) and LCD (VLCD)
○ Support two output mode SEG/GPO (SEG15~45)
○ built-in LED driver
○ Support two output mode SEG/LED driver (SEG46~48)
○ Support PWM source select, external clock or internal clock ( 12bit / 8bit mode selectable)
○ Low power consumption
○ Support standby mode
○ built-in Power-on Reset circuit
○ No external component
○ Support blink function (Blink frequency 1.6, 2.0, 2.6, 4.0 Hz selectable)
○ Operating power supply: 1.8~3.6V
○ LCD drive power supply voltage : 3.3~5.5V
○ Absolute maximum ratings (VSS = 0V)
Parameter
Symbol
Rated values
Unit
Remarks
Power supply
LCD drive voltage
Power supply voltage 1
Power supply voltage 2
Allowable loss
VDD
VLCD
Pd
-0.3 ~ +4.5
-0.5 ~ +7.0
0.8*1
V
V
W
Input voltage range
VIN
Topr
Tstg
Iout1
Iout2
Iout3
Iout4
-0.5 ~ VDD+0.5
-30 ~ +75
-55 ~ +125
V
℃
Operational temperature range
Storage temperature range
Output current
℃
5
5
10
50
mA
mA
mA
mA
SEG ouput
COM ouput
GPO ouput
LED ouput
*1 When use more than Ta=25 degree, subtract 8.0mW per degree. (using ROHM standard board)
(board size:114.3mm×76.2mm×1.6mm material: FR4 board copper foil: land pattern only)
○ Recommend operating conditions (Ta=-30~+75degree, VSS = 0V)
Parameter
Power supply voltage 1
Power supply voltage 2
LED Power supply voltage
Output current
Symbol
VDD
MIN
1.8
3.3
1.0
-
TYP
MAX
3.6
Unit
V
Remarks
Power supply
-
-
-
-
-
VLCD
VLED
Iout4
5.5
V
For LCD drive
VLCD
25
V
LED drive voltage
At one LED port
At all LED port
mA
mA
Iout4
-
75
○
This product is not designed against radioactive ray.
●
As for contents of mention of these materials. A service in the foreign exchange and foreign trade control law
(Technology in the design, the manufacture and the use). Be careful of handling because it is likely to correspond.
These goods are specific machines. Because the exclusive goods which are specially designed for the device are considered.
Whether that machine, device corresponds to strategic goods to decide as the foreign exchange and foreign trade control law.
You must have it judged.
●
Status of this document
The Japanese version of this document is the formal specification. A customer may use this translation version only for a reference to help reading the formal
version.
If there are any differences in translation version of this document, formal version takes priority.
REV. B