AND791GST/GST-LED
4 Lines x 40 Characters
Intelligent Character Display
The AND791GST/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
•
•
•
•
•
•
•
AND791GST: Super Twist Technology
AND791GST-LED: STN with LED backlight
Low voltage, +5V single power supply
Controller on board (HD44780)
Direct interface to 4- or 8-bit CPU
11 commands for control
Wide temperature range option (WGST)
Absolute Maximum Ratings (Continued)
Item
LED Power Dissipation
Operating Temperature
Storage Temperature
Symbol
P
D
T
op
T
stg
Rating
4160
0 to +50
–20 to +70
Unit
mW
°C
°C
Dot Matrix Dimensions
2.78
0.75
Electrical Characteristics (TA = 25°C)
Item
Supply Voltage
Symbol
V
DD
V
DD
-V
O
V
IH 1
V
IL 1
V
OH 1
V
OL 1
V
F
I
R
Min.
4.75
3.0
2.2
0
2.4
—
3.8
–
Typ.
5.00
–
—
—
—
—
4.1
–
Max.
5.25
6.3
V
DD
0.6
—
0.4
4.4
4.8
Unit
V
V
V
V
V
V
mA
4.89
High Level In Voltage
Low Level In Voltage
(I
OH
= 0.2 mA)
1.20
High Level Output Volt.
(–I
OH
= 0.2 mA)
Low Level Output Volt.
(I
OL
= 1.2 mA)
Specification
190.0 (W) x 54.0 (H) x 10 (D)
2.78 (W) x 4.89 (H)
147.0 (W) x 29.5 (H)
0.50 x 0.55
0.57 x 0.62
Unit
mm
mm
mm
mm
mm
LED Forward Voltage
(I
F
= 480 mA)
LED Reverse Current
(V
R
= 8 V)
Mechanical Characteristics
Item
Outline
Dimensions
Character Size
Viewing Area
Dot Size
Dot Pitch
Absolute Maximum Ratings
Item
Supply Voltage
Input Voltage
LED Forward Current
LED Reverse Voltage
Symbol
V
DD
V
IN
I
F
V
R
Rating
7.0
0
≤
V
IN
≤
V
DD
960
8
Unit
V
V
mA
V
Optical Characteristics (TA = 25˚C,
φ
= 0°,
θ
= 0°)
Item
Viewing Angle
Contrast
Response time
(rise)
Response time
(fall)
Symbol
φ
K
T
on
T
off
Min.
–
–
—
—
Typ.
50
6.0
140
160
Max.
–
–
170
190
Unit
degree
–
ms
ms
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.
4/2/05
1
Purdy Electronics Corporation • 720 Palomar Avenue • Sunnyvale, CA 94085
Tel: 408.523.8200 • Fax: 408.733.1287 • email@purdyelectronics.com • www.purdyelectronics.com
AND791GST/GST-LED
Intelligent Character Display
Connector Pin Assignment
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Signal
DB
7
DB
6
DB
5
DB
4
DB
3
DB
2
DB
1
DB
0
E
1
R/W
RS
V
O
GND
V
DD
E
2
NC
Enable (for upper 2 lines)
L: Data write from MPU to LCM. H: Data read
from LCM to MPU
L: Instruction code input. H: Data input
Liquid crystal driving voltage
Ground
Power supply voltage + 5V
Enable (for lower 2 lines)
No Connect
GND
V
DD
– V
O
= LCD Drive Voltage
VR10 to 20 kΩ
V
O
V
DD
V
DD
– V
O
VR
V
DD
(+5V)
Power Supply
Function
LCD panel is driven by the voltage V
DD
–V
O
, so an adjustable
V
O
is required for contrast control and temperature
compensation.
Temperature Variations
Data bus line
DB0-DB7 are for 8-bit operation
DB4-DB7 are for 4-bit operation
Temperature
0°C
+25°C
+50°C
Power Supply Block Diagram
V
DD
–
V
O
5.00
4.75
4.50
Dimensional Outline
4/2/05
Purdy Electronics Corporation • 720 Palomar Avenue • Sunnyvale, CA 94085
Tel: 408.523.8200 • Fax: 408.733.1287 • email@purdyelectronics.com • www.purdyelectronics.com
2
AND791GST/GST-LED
Intelligent Character Display
3
Purdy Electronics Corporation • 720 Palomar Avenue • Sunnyvale, CA 94085
Tel: 408.523.8200 • Fax: 408.733.1287 • email@purdyelectronics.com • www.purdyelectronics.com
4/2/05
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