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BO LYM I N
A
A
A
/
f
4
4
4
/
f
4
Feature
1. SMT PCB with metal frame
2. Built-in controller LC7981
3. 1/128 duty cycle
4. +5V single power supply
5. Option: LED, EL B/L
6. Option: negative voltage
Mechanical Data
Item
Module Dimension
Viewing Area
Dot Size
Dot Pitch
Standard Value Unit
72.4 x 70.0
49.0 x 49.0
0.32 x 0.32
0.35 x 0.35
BG128128A
mm
mm
mm
mm
Pin Assignment
Pin Symbol Function
1~8
9
10
11
12
13
14
15
16
17~18
19
20
DB0-7
RS
R/W
E
/CS
/RST
Vo
Vdd
Vss
NC
A
NC
Data bus line
Data/Instruction select
Data read/write
Enable signal
Chip select
Reset signal
Contrast adjustment
Power supply(+5V)
Power supply(GND)
No connection
Power supply for B/L +
Power supply for B/L -
Dimension
Electronic Characteristics
Item Symbol Condition
Input Voltage
Supply Current
LCD Driving
Voltage
LED Forward
Voltage
LED Forward
Current
Vdd
Idd
Vdd-Vo
Vf
If
Vdd = +5V
Vdd = +5V
o
25 C
o
25 C
o
25 C
Typical
Value
5.0
5.0
17.6
4.2
320
Unit
V
mA
V
V
mA
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