LC2021
20 characters x 2 lines
ABSOLUTE MAXIMUM RATINGS
Item
Supply Voltage(Logic)
Supply Voltage(LCD)
Input Voltage
Operating Temp.
Storage Temp.
Symbol
V
DD
- V
SS
V
DD
- V
O
V
I
T
opr
T
stg
Min.
-0.3
-0.3
-0.3
-20
-30
Max.
7.0
13.0
V
DD
+ 0.3
70
80
Unit
V
V
V
C
MECHANICAL DATA
Nominal Dimensions
Module Size ( W x H x T ) 116.0 x 37.0 x 10.0/13.5
83.0 x 18.6
Viewing Area ( W x H )
3.2 x 5.55
Character Size ( W x H )
0.6 x 0.65
Dot Size ( W x H )
Approx. 42 / 56
Weight (Reflective/LED)
Item
Unit
mm
mm
mm
mm
g
C
ELECTRICAL CHARACTERISTICS ( V
DD
=5V 0.25V )
Item
Input High Voltage
Input Low Voltage
Output High Voltage
Output Low Voltage
Supply Current
LCD Driving Voltage
Symbol
V
IH
V
IL
V
OH
V
OL
I
DD
V
DD
- V
O
Test
Condition
--
--
I
OH
= - 0.2mA
I
OL
= 1.2mA
V
DD
= 5.0V
Ta=25 C
Min.
2.2
- 0.3
2.4
0
--
--
Typ.
--
--
--
--
1.5
4.6
Max. Unit
V
DD
0.6
V
DD
0.4
3.0
--
V
V
V
V
mA
V
â
PIN CONNECTIONS
Pin
1
2
3
4
5
6
7
8
9
10
Symbol
V
SS
V
DD
V
O
RS
R/W
E
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
LEDA
LEDK
Level
0V
+5V
--
H/L
H/L
_
H,H >L
H/L
H/L
H/L
H/L
H/L
H/L
H/L
H/L
+5V
0V
Function
GND
Power supply for logic
Operating voltage for LCD
H : Data
L : Instruction code
H : Read
L : Write
Enable signal
In 8-bit bus mode, used as low
order bidirectional data bus.
In 4-bit bus mode, open these
pins.
In 8-bit bus mode, used as high
order bidirectional data bus.
In 4-bit bus mode, used as both
high and low order data bus.
Power supply for LED backlight
BLOCK DIAGRAM
V
SS
V
DD
V
O
RS
R/W
E
DB0
DB7
LCD
Controller
LSI
KS0066
or Eqv.
16 COM
LCD PANEL
20 Characters x 2 Lines
40 SEG
60 SEG
11
12
13
14
15
16
Segment driver
LED BACKLIGHT SPECIFICATIONS (Ta=25 C)
LEDA
LEDK
LED Backlight
Item
Forward Voltage
Forward Current
Emission Wave Length
Symbol
V
f
I
f
Typ.
4.1
210
568
Max.
4.3
--
--
Unit
V
mA
nm
λ
p
Microcontroller MCU
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