AND721GST-LED And

AND721GST/GST-LED Intelligent Character Display 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. Absolute Maximum Ratings (Continued) Features RoHS Compliant Item Symbol Rating Unit AND721GST: Super Twist Technology LED Reverse Voltage V 8V R AND721GST-LED: STN with LED backlight P Low voltage, +5V single power supply LED Power Dissipation 1900 mW D Controller on board (HD44780) Operating Tempera- T 0 to +50 C RoHS compliant op ture 11 commands for control Storage Temperature T -20 to +60 C Wide temperature range option (WGST) stg Dot Matrix Dimensions Electrical Characteristics (TA = 25C) 2.95 0.60 Symbo 0.60 Item Min. Typ. Max. Unit 0.55 l V 4.75 5.0 5.25 DD Supply Voltage V V -V 3.0 6.3 DD O High Level In Voltage V V V IN DD (V = 5.0V) DD Low Level In Voltage V 0 0.6 V IH (I = 0.2 mA) OH High Level Output Volt. V 2.4 V OH (I = 0.2 mA) OH Mechanical Characteristics Low Level Output Volt. V 0.4 V OL Item Specification Unit (I = 1.2 mA) OL Outline LED Forward Voltage 98 (W) x 60 (H) x 12 (D) mm V 3.8 4.1 4.4 V F Dimensions (I = 230 mA) F Character Size 2.95 (W) x 4.75 (H) mm LED Reverse Current I 2.4 mA R (V = 8 V) Viewing Area 76.0 (W) x 25.2 (H) mm R Dot Size 0.55 (W) x 0.55 (H) mm Optical Characteristics (TA 5 = 25C, = 0, = 0) Dot Pitch 0.60 (W) x 0.60 (H) mm Item Symbol Min. Typ. Max. Unit Absolute Maximum Ratings Viewing Angle f 50 degree Contrast K 6.0 Item Symbol Rating Unit T Turn On 200 400 ms Supply Voltage V 7.0 V on DD Turn Off T 250 400 ms V 0 V V Input Voltage V off IN IN DD Product specifications contained herein may be changed LED Forward Current I 480 mA F 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 1 Tel: 408.523.8200 Fax: 408.733.1287 sales purdyelectronics.com www.purdyelectronics.com 7-27-99 0.60 4.75 0.60 0.55 Connector Pin Assignment AND721GST/GST-LED Intelligent Character Display Connector Pin Assignment Power Supply Pin Signal Function The LCD panel is driven by the voltage V V , so an DD O 1 GND Ground adjustable V is required for contrast control and O temperature compensation. V 2 +5 Power Supply DD Temperature Variations V 3 LCD Drive Voltage O V V Temperature DD O H Data Input 4RS L Command Input 0C 5.00 5 R/W Read/Write +25C 4.75 6 E Enable +50C 4.50 7 DB0 Power Supply Block Diagram 8 DB1 9 DB2 (+5V) V DD Data Bus 10 DB3 DB0-DB7 are for 8-bit operation V V DD O 11 DB4 DB4-DB7 are for 4-bit operation V O VR V DD 12 DB5 13 DB6 GND 14 DB7 V V = LCD Drive Voltage 15 LED LED Anode (+) DD O VR10 to 20 k 16 LED LED Cathode Ground Block Diagram E 4 Driver R/W RS 40 20 4 Controller/ 40 DBO-DB7 8 Driver 16 V DD LCD Driver V O 16 16 GND 40 40 20 4 Driver Driver Dimensional Outline Purdy Electronics Corporation 720 Palomar Avenue Sunnyvale, CA 94085 7-27-99 Tel: 408.523.8200 Fax: 408.733.1287 sales purdyelectronics.com www.purdyelectronics.com 2