AND491GST ETC2

Document overview

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Technical content

Features

  • AND491GST: Super Twist Technology
  • AND491GST -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) Dot Matrix Dimensions Mechanical Characteristics Item Specification Unit Outline Dimensions 80 (W) x 36 (H) x 11 (D) mm Character size 2.95 (W) x 4.35 (H) mm Viewing Area 64.5 (W) x 13.8 (H) mm Bezel Opening 64.5 (W) x 13.8 (H) mm Dot Size 0.55 (W) x 0.50 (H) mm Dot Pitch 0.60 (W) x 0.55 (H) mm 0.55 0.60 0.702.95 0.50 0.55 0.70 4.35 Absolute Maximum Ratings Item Symbol Rating Unit Supply Voltage V DD 7.0 V Input Voltage V IN V IN V DD V Operating Temperature T op 0 to +50 °C Storage Temperature T stg –20 to +60 ˚C Electrical Characteristics (TA = 25°C) Item Symbol Min. Typ. Max. Unit Supply Voltage V DD O 4.75 5.0 5.25 V GND 3.0 0 6.3 High Level In Voltage DD = 5.0V) V IH 2.2 – – V Low Level In Voltage OH = 0.2 mA) V IL – – 0.6 V High Level Output Volt. (–I OH = 0.2 mA) V OH 2.4 – – V Low Level Output Volt. OL = 1.2 mA) V OL – – 0.4 V LED Forward Voltage F = 150 mA) V F 3.8 4.1 4.4 V LED Reverse Current R = 4 V) I R – – 100 µA Optical Characteristics (TA 5 = 25˚C, f = 0°, q = 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

Intelligent Character Display AND491GST/GST-LED Purdy Electronics Corporation • 720 Palomar Avenue • Sunnyvale, CA 94086 9/8/98 2-11 Power Supply The LCD panel is driven by the voltage V DD O , so you need an adjustable V O for contrast control and temperature compensation. Power Supply Block Diagram Block Diagram Dimensional Outline Connector Pin Assignment Pin No. Signal Function

1 GND Ground

+5 Power Supply 3 V O LCD Drive Voltage 4R S “H” Data Input “L” Command Input

5 R/W Read/Write

6 E Enable

7 DBO

DB0-DB7 are for 8-bit operation DB4-DB7 are for 4-bit operation

8 DB1

9 DB2

10 DB3

11 DB4

12 DB5

13 DB6

14 DB7

V DD O 0°C 5.00 +25°C 4.75 +50°C 4.50 VDD VO GND VDD – VO VDD – VO = LCD Drive Voltage VR10 to 20 kΩ VR VDD (+5V) Controller/ Driver E R/W RS VDD VO GND DB0-DB7 8 LCD Driver