ETC AND791GST

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
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Absolute Maximum Ratings (Continued)
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)
Item
Symbol
Rating
Unit
LED Power Dissipation
PD
4160
mW
Operating Temperature
Top
0 to +50
°C
Storage Temperature
Tstg
–20 to +70
°C
Electrical Characteristics (TA = 25°C)
Dot Matrix Dimensions
Item
2.78
Symbol
Min.
Typ.
Max.
VDD
4.75
5.00
5.25
VDD -VO
3.0
–
6.3
High Level In Voltage
VIH 1
2.2
—
VDD
V
Low Level In Voltage
(IOH = 0.2 mA)
VIL 1
0
—
0.6
V
High Level Output Volt.
(–IOH = 0.2 mA)
VOH 1
2.4
—
—
V
Low Level Output Volt.
(IOL = 1.2 mA)
VOL 1
—
—
0.4
V
VF
3.8
4.1
4.4
V
IR
–
–
4.8
mA
0.75
1.20
4.89
Supply Voltage
Mechanical Characteristics
Specification
Unit
LED Forward Voltage
(IF = 480 mA)
190.0 (W) x 54.0 (H) x 10 (D)
mm
LED Reverse Current
(VR = 8 V)
Character Size
2.78 (W) x 4.89 (H)
mm
Viewing Area
147.0 (W) x 29.5 (H)
mm
0.50 x 0.55
mm
Item
Outline
Dimensions
Dot Size
Dot Pitch
0.57 x 0.62
mm
Absolute Maximum Ratings
Item
Symbol
Rating
Unit
Supply Voltage
VDD
7.0
V
Input Voltage
VIN
0 ≤ VIN ≤ VDD
V
LED Forward Current
IF
960
mA
LED Reverse Voltage
VR
8
V
1
Unit
V
Optical Characteristics (TA = 25˚C, φ = 0°, θ = 0°)
Symbol
Min.
Typ.
Max.
Unit
Viewing Angle
Item
φ
–
50
–
degree
Contrast
K
–
6.0
–
–
Response time
(rise)
Ton
—
140
170
ms
Response time
(fall)
Toff
—
160
190
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.
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
AND791GST/GST-LED
Intelligent Character Display
Power Supply
Connector Pin Assignment
Pin No.
Signal
1
DB7
Function
2
DB6
3
DB5
4
DB4
5
DB3
6
DB2
7
DB1
8
DB0
9
E1
10
R/W
L: Data write from MPU to LCM. H: Data read
from LCM to MPU
11
RS
L: Instruction code input. H: Data input
12
VO
Liquid crystal driving voltage
13
GND
Ground
14
VDD
Power supply voltage + 5V
15
E2
Enable (for lower 2 lines)
16
NC
No Connect
LCD panel is driven by the voltage VDD –VO, so an adjustable
VO 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
VDD –VO
0°C
5.00
+25°C
4.75
+50°C
4.50
Power Supply Block Diagram
Enable (for upper 2 lines)
(+5V)
VDD
VDD – VO
VO
VR
VDD
GND
VDD – VO = LCD Drive Voltage
VR10 to 20 kΩ
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