BU9798KV Datasheet, PDF (1/5 Pages) Rohm – Silicon monolithic integrated circuit

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STRUCTURE
Silicon monolithic integrated circuit
PRODUCT NAME BU9798KV
FUNCTION
FEATURE
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 )
○ 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 voltage 1
VDD
-0.3 ~ +4.5
V Power supply
Power supply voltage 2
VLCD
-0.5 ~ +7.0
V LCD drive voltage
Allowable loss
Pd
1.0*¹
W
Input voltage range
VIN
-0.5 ~ VDD+0.5
V
Operational temperature range
Topr
-30 ~ +75
℃
Storage temperature range
Tstg
-55 ~ +125
℃
Output current
Iout1
5
mA SEG ouput
Iout2
5
mA COM ouput
Iout3
10
mA GPO ouput
Iout4
50
mA LED ouput
*1 When use more than Ta=25 degree, subtract 10.0mW per degree. （using ROHM standard board）
（board size：70mm×70mm×1.6mm material: FR4 board copper foil: land pattern only）
○ Recommend operating conditions (Ta=-30~＋75degree, VSS = 0V)
Parameter
Symbol
MIN
TYP
MAX
Unit
Remarks
Power supply voltage 1
VDD
1.8
-
3.6
V Power supply
Power supply voltage 2
VLCD
3.3
-
5.5
V For LCD drive
LED Power supply voltage
VLED
1.0
-
VLCD
V LED drive voltage
Output current
Iout4
-
-
25
mA At one LED port
version.
Iout4
-
-
75
mA At all LED port
○ 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
If there are any differences in translation version of this document, formal version takes priority.
REV. A