
S1C88348/317/316/308 TECHNICAL HARDWARE
EPSON
I-153
7 ELECTRICAL CHARACTERISTICS
7.4 Analog Circuit Characteristics
s LCD drive circuit
The Typ. values of the LCD drive voltage shown in the following table shift in difference of panel load
(panel size, drive duty, display segment number). Therefore, these should be evaluated by connecting to
the actual panel to be used. Moreover, if the display is uneven with a large panel load, connect a resistor
(R1) between the VSS and VC1 terminal. (It is necessary in 1/32 duty driving.)
LCD drive voltage
VC1
VC2
VC3
VC4
VC5
TYPE A
(4.5V)
VC5
TYPE B
(5.5V)
0.18VC5
0.39VC5
0.59VC5
0.80VC5
Typ
×0.94
Typ
×0.94
3.89
3.96
4.04
4.11
4.18
4.26
4.34
4.42
4.50
4.58
4.66
4.74
4.82
4.90
4.99
5.08
4.73
4.83
4.92
5.02
5.11
5.21
5.30
5.40
5.50
5.60
5.70
5.81
5.93
6.05
6.17
6.29
0.22VC5
0.43VC5
0.63VC5
0.84VC5
Typ
×1.06
Typ
×1.06
V
*1
*2
*3
*4
*5
LCX = 0H
LCX = 1H
LCX = 2H
LCX = 3H
LCX = 4H
LCX = 5H
LCX = 6H
LCX = 7H
LCX = 8H
LCX = 9H
LCX = AH
LCX = BH
LCX = CH
LCX = DH
LCX = EH
LCX = FH
LCX = 0H
LCX = 1H
LCX = 2H
LCX = 3H
LCX = 4H
LCX = 5H
LCX = 6H
LCX = 7H
LCX = 8H
LCX = 9H
LCX = AH
LCX = BH
LCX = CH
LCX = DH
LCX = EH
LCX = FH
Item
Symbol
Min.
Typ.
Max.
Unit
Condition
Note
*1
*2
*3
*4
*5
Unless otherwise specified: VDD = VC2 (LCX = FH) +0.1 to 5.5 V, VSS = 0 V, Ta = 25
°C,
C1 = C2 = C3 = C4 = C5 = C6 = C7 = C8 = C9 = 0.1
F
Connects 1 M
 load resistor between VSS and VC1. (without panel load)
Connects 1 M
 load resistor between VSS and VC2. (without panel load)
Connects 1 M
 load resistor between VSS and VC3. (without panel load)
Connects 1 M
 load resistor between VSS and VC4. (without panel load)
Connects 1 M
 load resistor between VSS and VC5. (without panel load)