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