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| AND771GST/GST-LED 2 Lines x 24 Characters Intelligent Character Display The AND771GST/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 * * * * * * * AND771GST: Super Twist Technology AND771GST-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) Absolute Maximum Ratings (Cont) Item LED Forward Current LED Reverse Voltage LED Power Dissipation Operating Temperature Storage Temperature 3.20 0.60 0.05 0.50 Symbol IF VR PD Top Tstg Rating 280 4 1150 0 to +50 -20 to +60 Unit mA V mW C C Dot Matrix Dimensions Electrical Characteristics (TA = 25C) Item Supply Voltage High Level In Voltage (VDD = 5.0V) Low Level In Voltage (IOH = 0.2 mA) High Level Output Volt. (-IOH = 0.2 mA) Unit mm mm mm mm mm mm Optical Characteristics (TA = 25C, = 0, = 0) Item Viewing Angle Contrast Rating 7.0 Unit V V Turn On Turn Off Symbol K Ton Toff Min. - - - - Typ. 50 6.0 200 250 Max. - - 400 400 Unit degree - ms ms Low Level Output Volt. (IOL = 1.2 mA) LED Forward Voltage (IF = 160 mA) LED Reverse Current (VR = 4 V) Symbol VDD VDD -VO VIH VIL VOH VOL VF IR Min. 4.75 3.0 2.2 0 2.4 - 3.8 - Typ. 5.0 - - - - - 4.1 - Max. 5.25 6.3 - 0.6 - 0.4 4.4 100 V V V A Unit V V Mechanical Characteristics Item Outline Dimensions Character Size Viewing Area Bezel Opening Dot Size Dot Pitch Specification 118 (W) x 36 (H) x 11 (D) 3.20 (W) x 5.55 (H) 93.5 (W) x 15.8 (H) 93.5 (W) x 15.8 (H) 0.60 (W) x 0.60 (H) 0.65 (W) x 0.65 (H) Absolute Maximum Ratings Item Supply Voltage Input Voltage Symbol VDD VIN 0.40 5.55 0.65 0.05 0 VIN VDD 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. 1 Purdy Electronics Corporation * 720 Palomar Avenue * Sunnyvale, CA 94085 Tel: 408.523.8200 * Fax: 408.733.1287 * sales@purdyelectronics.com * www.purdyelectronics.com 7/23/07 2 Purdy Electronics Corporation * 720 Palomar Avenue * Sunnyvale, CA 94085 Tel: 408.523.8200 * Fax: 408.733.1287 * sales@purdyelectronics.com * www.purdyelectronics.com 7/23/07 AND771GST/GST-LED Intelligent Character Display Connector Pin Assignment Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Signal GND VDD VO RS R/W E DBO DB1 DB2 DB3 DB4 DB5 DB6 DB7 NC NC No Connection No Connection GND VDD - VO = LCD Drive Voltage VR10 to 20 k Power Supply Function LCD panel is driven by the voltage VDD -VO, so adjustable VO is required for contrast control and temperature compensation. Temperature Variations Temperature 0C +25C +50C Power Supply Block Diagram V DD -VO Ground +5 Power Supply LCD Drive Voltage "H" Data Input "L" Command Input Read/Write Enable 5.00 4.75 4.50 Data Bus DB0-DB7 are for 8-bit operation DB4-DB7 are for 4-bit operation VDD VDD - VO VO (+5V) VR VDD Block Diagram E R/W RS DB0-DB7 VDD VO GND 8 Controller/ Driver 16 LCD 40 2 40 40 Driver Driver Dimensional Outline 3 Purdy Electronics Corporation * 720 Palomar Avenue * Sunnyvale, CA 94085 Tel: 408.523.8200 * Fax: 408.733.1287 * sales@purdyelectronics.com * www.purdyelectronics.com 7/23/07 |
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