BU9794KV Datasheet, PDF (12/23 Pages) Rohm – For 200 Segment type LCD LCD Segment Driver

● Electrical Characteristics (BU9799KV)
DC Characteristics (VDD=2.5～5.5V, VLCD=2.5～5.5V, VSS=0V, Ta=-40～85degree, unless otherwise specified)
Parameter
Symbol _MIN
Limit
TYP
MAX
Unit
Condition
“H” level input voltage
VIH 0.8VDD -
VDD
V SDA,SCL
“L” level input voltage
VIL
VSS
- 0.2VDD V SDA,SCL
“H” level input current
IIH
-
-
1
uA SDA,SCL
“L” level input current
IIL
-1
-
-
uA SDA,SCL
LCD Driver on SEG
resistance
COM
RON
RON
-
-
3.5
3.5
-
-
kΩ
kΩ
Iload=±10uA
Standby current
Ist
-
-
5
uA Display off, Oscillation off
VDD=3.3V, VLCD=5V, Ta=25degree
Power consumption 1
IDD
-
2.5
15
uA Power save mode1, FR=70Hz
1/3 bias, Frame inverse
VDD=3.3V, VLCD=5V, Ta=25degree
Power consumption 2
ILCD
-
10
20
uA 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
Symbol _MIN
Limit
TYP
MAX
Unit
Condition
Frame frequency
fCLK
56
80
104
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
Symbol _MIN.
Limit
TYP.
MAX. ^Unit
Condition
Input rise time
tr
-
-
0.3 us
Input fall time
tf
-
-
0.3 us
SCL cycle time
tSCYC 2.5
-
-
us
“H” SCL pulse width
tSHW 0.6
-
-
us
“L” SCL pulse width
tSLW 1.3
-
-
us
SDA setup time
tSDS 100
-
-
ns
SDA hold time
tSDH 100
-
-
ns
Buss free time
tBUF 1.3
-
-
us
START condition hold time tHD;STA 0.6
-
-
us
START condition setup time tSU;STA 0.6
-
-
us
STOP condition setup time tSU;STO 0.6
-
-
us
Noise cancel width
tsp
-
-
50
us
SDA
SCL
SDA
tBUF
tLW
tHD;STA tr
tr
tcyc
tSP
tSDH tHW tSDS
tSU;STA
Fig. BU9799KV-1 interface timing
tSU;STO
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