DMC-20434 Optrex America Inc, DMC-20434 Datasheet - Page 7

• Manufacturer Part Number: DMC-20434
• Description: LCD MODULE 20X4 CHARACTERS
• Manufacturer: Optrex America Inc
• Series: DMC-20434r

Specifications of DMC-20434

• Display Type: TN - Twisted Nematic
• Display Mode: Reflective
• Viewing Area: 76.00mm L x 25.20mm W
• Backlight: Without Backlight
• Display Format: 20 x 4
• Character Size: 4.75mm H x 2.95mm W
• Character Format: 5 x 8 Dots
• Voltage - Supply: 5.0V
• Dot Size: 0.55mm W x 0.55mm H
• Operating Temperature: 0°C ~ 50°C
• Interface: -
• Number Of Digits/alpha: -
• Outline L X W X H: -
• Other names: 73-1086; OP420

No.
4.I/O Terminal
10
11
12
13
14
1
2
3
4
5
6
7
8
9
4.1.Pin Assignment
4.2.Example of Power Supply
DMC20434 (AA) No.99-0259
It is recommended to apply a potentiometer for the contrast adjust due to the tolerance
of the driving voltage and its temperature dependence.
Symbol
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
R/W
V
V
V
RS
E
CC
EE
SS
H,H→L
Level
H / L
H / L
H / L
H / L
H / L
H / L
H / L
H / L
H / L
H / L
MODULE
－
－
－
VR=10 ～ 20K Ω
Power Supply (0V, GND)
Power Supply for Logic
Power Supply for LCD Drive
Register Select Signal
Read/Write Select Signal H : Read L : Write
Enable Signal (No pull-up Resister)
Data Bus Line / Non-connection at 4-bit operation
Data Bus Line / Non-connection at 4-bit operation
Data Bus Line / Non-connection at 4-bit operation
Data Bus Line / Non-connection at 4-bit operation
Data Bus Line
Data Bus Line
Data Bus Line
Data Bus Line
VCC
VSS
VEE
VR
OPTREX
OPTREX CORPORATION
VCC (+Voltage)
VSS (0V)
Function
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