SOLOMON
SSD1820A/21
25
REV 1.4
01/03
* The formula for the temperature coefficient is:
VOH1
VOL1
VL6
VL6
Output High Voltage (D0-D7)
Output Low Voltage (D0-D7)
LCD Driving Voltage Source (VL6 Pin)
LCD Driving Voltage Source (VL6 Pin)
Iout = +500µA
Iout = -500µA
Regulator Enabled (VL6 voltage depends on Int/Ext
Contrast Control)
Regulator Disable
0.8*VD
D
0
V DD
-
-
-
-
Floating
VDD
0.2*VD
D
VCC-
0.5
-
V
V
V
V
VIH1
V IL1
Input high voltage
(RES, PS0, PS1, CS, D/C, R/W, D0-D7, REF,
INTRS)
Input Low voltage
(RES, PS0, PS1, CS, D/C, R/W, D0-D7, REF,
INTRS)
0.8*VD
D
0
-
-
VDD
0.2*VD
D
V
V
VL6
VL5
VL4
VL3
VL2
VL6
VL5
VL4
VL3
VL2
LCD Display Voltage Output
(V L6, VL5, VL4, VL3, VL2 Pins)\
LCD Display Voltage Inpu
(V L6, VL5, VL4, VL3, VL2 Pins)
Bias Divider Enabled, 1:a bias ratio
Voltage reference to VSS, External Voltage Genera-
tor, Bias Divider Disabled
-
-
-
-
-
VL5
VL4
VL3
VL2
VSS
VL6
(a-1)/a*VL6
(a-2)/a*VL6
2/a*VL6
1/a*VL6
-
-
-
-
-
-
-
-
-
-
VCC
VL6
VL5
VL4
VL3
V
V
V
V
V
V
V
V
V
V
IOH
IOL
IOZ
Output High Current Source
(D0-D7)
Output Low Current Drain
(D0-D7)
Output Tri-state Current Drain Source
(D0-D7)
Vout=VDD -0.4V
Vout=0.4V
50
-
-1
-
-
-
-
-50
1
µA
µA
µA
IIL/I IH
Input Current
(RES , PS0, PS1, CS , E, D/C, R/W, D0-D7,
REF, INTRS)
-1
-
1
µA
CIN
Input Capacitance
(all logic pins)
-
5
7.5
pF
∆VL6
Variation of VL6 Output (1.8V < VDD < 3.0V)
Regulator
Enabled,
Internal
Contrast
Control
Enabled, Set Contrast Control Register = 0
-
± 2
-
%
PTC0
PTC1
Temperature Coefficient Compensation*
Temperature Coefficient 0
Temperature Coefficient 1
Voltage Regulator Enabled (POR for SSD1820A)
Voltage Regulator Enabled (POR for SSD1821)
-0.04
-0.06
-0.05
-0.07
-0.06
-0.08
%
%
TC(%)=
VL6 at 50°C - VL6 at 0°C
50°C - 0°C
X
1
VL6 at 25°C
X 100%
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