BU9795AKS2 Datasheet, PDF (7/40 Pages) Rohm – Standard LCD Segment Drivers

BU9795Axxx Series MAX 140 segments (SEG35×COM4)
Datasheet
●Electrical Characteristics - continued
Oscillation Characteristics (VDD=2.5V to 5.5V,VSS=0V, Ta=-40°C to +85°C)
Parameter
Symbol
MIN
Limits
TYP
Unit
MAX
Frame frequency
fCLK
56
80
104 Hz
Frame frequency1
fCLK1
70
80
90
Hz
Conditions
FR = 80Hz setting
VDD=3.5V, 25°C
MPU interface Characteristics(VDD=2.5V to 5.5V,VSS=0V, Ta=-40°C to +85°C)
Parameter
Symbol
MIN
Limits
TYP
Unit
MAX
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 width
tCHW 50
-
-
ns
Conditions
tCHW
CSB
SCL
tCSS
tf
tSLW
tr
tSCYC
tSHW
tSDS tSDH
tCSH
SD
●I/O equivalent circuit
VDD
VLCD
VSS
Figure 10. Interface Timing
VDD
TEST
VSS
VDD
CSB, SD, SCL
VSS
VDD
OSCIN
VSS
VDD
INHb
VSS
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VDD
VSS
Figure 11. I/O equivalent circuit
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TSZ02201-0A0A2D300020-1-2
12.July.2012 Rev.002