BU9794KV Datasheet, PDF (2/23 Pages) Rohm – For 200 Segment type LCD LCD Segment Driver

● Electrical Characteristics (BU9794KV)
DC Characteristics (VDD=2.5～5.5V, VLCD=2.5～5.5V, VSS=0V, Ta=-40～85degree, unless otherwise specified)
Parameter
Symb
ol MIN
Limit
TYP
MAX ^Unit
Condition
“H” level input voltage
VIH 0.8VDD -
VDD V SD,SCL,CSB
“L” level input voltage
VIL VSS
- 0.2VDD V SD,SCL,CSB
“H” level input current
IIH
-
-
1
uA SD,SCL,CSB
“L” level input current
IIL
-1
-
-
uA SD,SCL,CSB
LCD Driver on SEG RON
-
resistance
COM RON
-
3.5
3.5
-
-
kΩ
kΩ
Iload=±10uA
Standby current
Ist
-
-
5
uA Display off, Oscillation off
VDD=3.3V,
VLCD=5V,
Power consumption 1
IDD
-
5
15
uA
Ta=25degree
Power save mode1, FR=70Hz
1/3 bias, Frame inverse
VDD=3.3V,
VLCD=5V,
Power consumption 2
ILCD
-
10
20
uA
Ta=25degree
Power save mode1, FR=70Hz
1/3 bias, Frame inverse
Oscillation Characteristics (VDD=2.5～5.5V, VLCD=2.5～5.5V, VSS=0V, Ta=-40～85degree, unless otherwise specified)
Parameter
Symbo
l
MIN
Limit
TYP
MAX
Unit
Condition
Frame frequency
fCLK 68
80
92
Hz
FR = 80Hz setting
VDD=3.3V
MPU interface Characteristics (VDD=2.5 ～ 5.5V, VLCD=2.5 ～ 5.5V, VSS=0V, Ta=-40 ～ 85degree, unless otherwise
specified)
Parameter
Symbo
l
MIN.
Limit
TYP.
MAX. ^Unit
Condition
Input rise time
tr
-
-
80
ns
Input fall time
tf
-
-
80
ns
SCL cycle time
tSCYC 400
-
-
ns
“H” SCL pulse width
tSHW 100
-
-
ns
“L” SCL pulse width
tSLW 100
-
-
ns
SD setup time
tSDS 20
-
-
ns
SD hold time
tSDH 50
-
-
ns
CSB setup time
tCSS 50
-
-
ns
CSB hold time
tCSH 50
-
-
ns
“H” CSB pulse time
tCHW 50
-
-
ns
tCHW
CSB
SCL
tCSS
tf
tSLW
tr
tSCYC
tSDS
tSHW
tSDH
tCSH
SD
Fig. BU9794KV-1 Interface Timing
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