Purdy AND481GST User Manual

AND481GST/GST-LED

2 Lines x 16 Characters
Intelligent Character Display

The AND481GST/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

• RoHS Compliant

• 5 x 7 Dots with cursor

• Built-in controller (HD44780U or equivalent)

• 5V Power supply

• 1/16 Duty cycle

• 4.2V LED Forward voltage

• Dot Matrix Dimensions

3.55

2.96

0.56

0.04

5.94

0.04

0.66

5.56

SCALE 4/1

Mechanical Characteristics

Item Specification Unit

Outline
Dimensions

Character Size 2.96 (H) x 5.56 (V) mm

Character
Pitch

Viewing Area 65.0 (H) x 16.0 (V) mm

Dot Size 0.56 (H) x 0.66 (V) mm

Dot Pitch 0.60 (H) x 0.70 (V) mm

85.0 (H) x 30.0 (V) x 8.8 (D)
(12.7 LED)

3.55 (H) x 5.94 (V) mm

mm

Absolute Maximum Ratings (Continued)

Item Symbol Rating Unit

LED Forward Current

LED Reverse Voltage

LED Power Dissipation

Operating Temperature

Storage Temperature

I

F

V

R

P

D

T

op

T

stg

200 mA

8V

920 mW

0 to +50 °C

–20 to +60 °C

Electrical Characteristics (TA = 25°C)

Item Symbol Cond. Min. Typ. Max. Unit

T=0 °C – 4.8 –

-V

LCD Operating Voltage

V

DD

O

T=50 °C – 4.2 –

Supply Voltage

Supply Current

Input
Voltage

Output
Voltage

“High” Level

“Low” Level

“High” Level

“Low” Level

V

DD

I

DD

V

IH

V

IL

V

OH

V

OL

– 4.7 5 5.3 V

SS

– – 3.2 6 mA

– 2.2 –

–0–0.6

–2.4––

–––0.4

V

DD

-V

Optical Characteristics (TA = 25˚C, f = 0°, q = 0°)

Item Symbol Min. Typ. Max. Unit

Viewing Angle f – 50 – degree

Contrast K – 6.0 – –

Turn On

Turn Off

T

on

T

off

– 200 400 ms

– 250 400 ms

VT=25 °C – 4.5 –

V

V

Absolute Maximum Ratings

Item Symbol Rating Unit

Supply Voltage

Input Voltage

7/20/07

Tel: [phone] • Fax: [phone] • [e-mail] • www.ANDdisplays.com 1

V

V

Purdy Electronics Corporation • 720 Palomar Avenue • Sunnyvale, CA 94085

DD

IN

7.0 V

0 ≤ V

≤ V

IN

DD

V

AND481GST/GST-LED

Intelligent Character Display

Connector Pin Assignment

Pin
No.

Signal Function

1

2

3

V

V

DD

SS

V

O

5V

0V

Contrast Adj.

4 RS Register Select

5 R/W Read/Write

6 E Enable Signal

7 DB0 Data Bit 0

8 DB1 Data Bit 1

9 DB2 Data Bit 2

10 DB3 Data Bit 3

11 DB4 Data Bit 4

12 DB5 Data Bit 5

13 DB6 Data Bit 6

14 DB7 Data Bit 7

Block Diagram

Power Supply

The LCD panel is driven by the voltage V
an adjustable V
compensation.

Temperature Variations

Temperature

Power Supply Block Diagram

for contrast control and temperature

O

0°C 5.00

+25°C 4.75

+50°C 4.50

–V

DD

O

V

DD

, so you need

–V

O

DB7-DB0

R/W

RS

V

V
V

Dimensional Outline

LCD

E

CONTROLLER
LSI
HD4478OU

O

DD

SS

or
Equivalent

COM 16

SEG 40

CONTROL SIGNAL 4

LCD PANEL

SEG 40

LCD SEGMENT DRIVER X 1

7/20/07

Tel: [phone] • Fax: [phone] • [e-mail] • www.ANDdisplays.com 2

Purdy Electronics Corporation • 720 Palomar Avenue • Sunnyvale, CA 94085