BU9798KV Datasheet, PDF (2/5 Pages) Rohm – Silicon monolithic integrated circuit

○Block diagrams
VSS2
COM0……COM3 SEG0 ……………………………… SEG48
VLCD
LCD voltage
Generator
Ref Voltage
Circuit
Vreg
LCD
BIAS
SELECTOR
common
driver
Segment Segment Segment
driver driver/GPO driver/LED
GPO/LED
Controller
common blink timing
counter generator
DDRAM
GPO data latch
PW M
Generator
INHb
CLKIN
VDD
VSS
VSS
OSCILLATOR
Power On Reset
TEST1
Command register
Data Decoder
serial inter face
IF FILTER
CSB
SD
SCL
Output
Controller
PW MOUT
○Outline drawing
BU9798K
Lot No.
2/4
○ Electrical Characteristics
Package: VQFP64
( Ta=-30~75degree, VDD=1.8V~3.6V, VLCD=3.3V~5.5V, VSS=0 ; unless otherwise specified )
Parameter
“H” level input voltage
“L” level input voltage
Hysteresis width
Symbol
VIH
VIL
VH
Limit
Unit
MIN
TYP MAX
Condition
0.8VDD
-
VDD
V SD, SCL, CSB, CLKIN, TEST1, INHb
VSS
- 0.2VDD V SD, SCL, CSB, CLKIN, TEST1, INHb
-
0.2
-
V SCL, INHb, VDD=3.3V, Ta=25degree
“H” level input current
IIH1
-
-
5
uA SD, SCL, CSB, CLKIN, INHb, VI=3.6V
“L” level input current
IIL1
-5
-
-
uA SD, SCL, CSB, CLKIN, INHb, TEST1, VI=0V
VOH1 VLCD-0.4 -
-
V
Iload=-50uA, VLCD=5.0V, SEG0~48,
In case, internal regulator do not used
“H” level output
voltage (＊1)
VOH2 VLCD-0.4 -
-
V
Iload=-50uA, VLCD=5.0V, COM0~3,
IN case, internal regulator do not used
(＊3)
VOH3 VLCD-0.6 -
-
V
Iload=-1mA,VLCD=5.0V,SEG15~45(GPO mode)
In case, internal regulator do not used
VOH4 VDD-0.6
-
-
V Iload=-1mA, VDD=3.3V, PWMOUT
VOL1
-
-
0.4
V Iload= 50uA, VLCD=5.0V, SEG0~48
VOL2
-
-
0.4
V Iload= 50uA, VLCD=5.0V, COM0~3
“L” level output
voltage (＊3)
VOL3
-
-
0.5
V
Iload=1mA, VLCD=5.0V, VDD=3.3V
SEG15~45(GPO mode）, PWMOUT
VOL4
-
0.11
0.5
V
Iload=20mA, VLCD=5.0V
SEG46~48（LED drive mode）
IstVDD
-
3
10
uA Input terminal ALL’L’, Display off, Oscillation off
IstVLCD
-
0.5
5
uA Input terminal ALL’L’, Display off, Oscillation off
IVDD1
-
8
15
uA
VDD=3.3V, Ta=25degree, 1/3bias, fFR=64Hz,
PWM generate off, All output pin open
IVDD2
-
90
130
uA
VDD=3.3V, Ta=25degree, 1/3bias, fFR=64Hz,
PWM Frequency=500Hz setting, output pin open
Supply current (＊2) IVLCD1
-
VLCD=5.0V, Ta=25degree, 1/3bias、fFR=64Hz,
10
15
uA internal regulator do not used, LED drive mode off, All
output pin open
VLCD=5.0V, Ta=25degree, 1/3bias, fFR=64Hz,
IVLCD2
-
25
40
uA using internal regulator , LED drive mode off, All output pin
open
VLCD=5.0V, Ta=25degree, 1/3bias,
IVLCD3
-
30
48
uA fFR=64Hz, using built-in regulator,
PWM Frequency=500Hz setting, output pin open
*1 In case, internal regulator do not use. When you use internal regulator, please add load regulation specified at page3
*2 In case, power save mode 1 and frame inversion setting *3 Iload : In case, load current from only one port
REV. A