Purdy AND721GST/GST-LED User Manual
And721gst/gst-led, Intelligent character display and721gst/gst-led, Features
Purdy Electronics Corporation • 720 Palomar Avenue • Sunnyvale, CA 94085
1
Tel: 408.523.8200 • Fax: 408.733.1287 •
• www.purdyelectronics.com
7-27-99
Intelligent Character Display
AND721GST/GST-LED
AND721GST/GST-LED
4 Lines x 20 Characters
Intelligent Character Display
The AND721GST/GST-LED devices are compact,
LCD modules that have an on-board LCD controller and
driver circuit. These devices can display 160 characters
(numerals, letters, symbols and Kana letters), as well as eight
custom characters.
Features
•
AND721GST: Super Twist Technology
•
AND721GST-LED: STN with LED backlight
•
Low voltage, +5V single power supply
•
Controller on board (HD44780)
•
RoHS compliant
•
11 commands for control
•
Wide temperature range option (WGST)
Dot Matrix Dimensions
Mechanical Characteristics
Item
Specification
Unit
Outline
Dimensions
98 (W) x 60 (H) x 12 (D)
mm
Character Size
2.95 (W) x 4.75 (H)
mm
Viewing Area
76.0 (W) x 25.2 (H)
mm
Dot Size
0.55 (W) x 0.55 (H)
mm
Dot Pitch
0.60 (W) x 0.60 (H)
mm
Absolute Maximum Ratings
Item
Symbol
Rating
Unit
Supply Voltage
V
DD
7.0
V
Input Voltage
V
IN
0
≤
V
IN
≤
V
DD
V
LED Forward Current
I
F
480
mA
0.55
0.60
0.60
2.95
0.55
0.60
0.60
4.75
LED Reverse Voltage
V
R
8
V
LED Power Dissipation
P
D
1900
mW
Operating Tempera-
ture
T
op
0 to +50
°C
Storage Temperature
T
stg
-20 to +60
°C
Electrical Characteristics (TA = 25°C)
Item
Symbo
l
Min.
Typ.
Max.
Unit
Supply Voltage
V
DD
4.75
5.0
5.25
V
V
DD
-V
O
3.0
–
6.3
High Level In Voltage
(V
DD
= 5.0V)
V
IN
–
–
V
DD
V
Low Level In Voltage
(I
OH
= 0.2 mA)
V
IH
0
–
0.6
V
High Level Output Volt.
(–I
OH
= 0.2 mA)
V
OH
2.4
–
–
V
Low Level Output Volt.
(I
OL
= 1.2 mA)
V
OL
–
–
0.4
V
LED Forward Voltage
(I
F
= 230 mA)
V
F
3.8
4.1
4.4
V
LED Reverse Current
(V
R
= 8 V)
I
R
–
–
2.4
mA
Optical Characteristics (TA 5 = 25˚C,
φ
= 0°,
θ
= 0°)
Item
Symbol
Min.
Typ.
Max.
Unit
Viewing Angle
f
–
50
–
degree
Contrast
K
–
6.0
–
–
Turn On
T
on
–
200
400
ms
Turn Off
T
off
–
250
400
ms
Absolute Maximum Ratings (Continued)
Item
Symbol
Rating
Unit
Product specifications contained herein may be changed
without prior notice. It is therefore advisable to contact
Purdy Electronics before proceeding with the design of
equipment incorporating this product.
• RoHS Compliant