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| AND791GST/GST-LED 4 Lines x 40 Characters Intelligent Character Display The AND791GST/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 * * * * * * * AND791GST: Super Twist Technology AND791GST-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 (Continued) Item LED Power Dissipation Operating Temperature Storage Temperature Symbol PD Top Tstg Rating 4160 0 to +50 -20 to +70 Unit mW C C Dot Matrix Dimensions 2.78 0.75 Electrical Characteristics (TA = 25C) Item Supply Voltage Symbol VDD VDD -VO VIH 1 VIL 1 VOH 1 VOL 1 VF IR Min. 4.75 3.0 2.2 0 2.4 -- 3.8 - Typ. 5.00 - -- -- -- -- 4.1 - Max. 5.25 6.3 VDD 0.6 -- 0.4 4.4 4.8 Unit V V V V V V mA 4.89 High Level In Voltage Low Level In Voltage (IOH = 0.2 mA) 1.20 High Level Output Volt. (-IOH = 0.2 mA) Low Level Output Volt. (IOL = 1.2 mA) Specification 190.0 (W) x 54.0 (H) x 10 (D) 2.78 (W) x 4.89 (H) 147.0 (W) x 29.5 (H) 0.50 x 0.55 0.57 x 0.62 Unit mm mm mm mm mm LED Forward Voltage (IF = 480 mA) LED Reverse Current (VR = 8 V) Mechanical Characteristics Item Outline Dimensions Character Size Viewing Area Dot Size Dot Pitch Absolute Maximum Ratings Item Supply Voltage Input Voltage LED Forward Current LED Reverse Voltage Symbol VDD VIN IF VR Rating 7.0 0 VIN VDD 960 8 Unit V V mA V Optical Characteristics (TA = 25C, = 0, = 0) Item Viewing Angle Contrast Response time (rise) Response time (fall) Symbol K Ton Toff Min. - - -- -- Typ. 50 6.0 140 160 Max. - - 170 190 Unit degree - ms ms 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. 4/2/05 1 Purdy Electronics Corporation * 720 Palomar Avenue * Sunnyvale, CA 94085 Tel: 408.523.8200 * Fax: 408.733.1287 * email@purdyelectronics.com * www.purdyelectronics.com AND791GST/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 DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 E1 R/W RS VO GND VDD E2 NC Enable (for upper 2 lines) L: Data write from MPU to LCM. H: Data read from LCM to MPU L: Instruction code input. H: Data input Liquid crystal driving voltage Ground Power supply voltage + 5V Enable (for lower 2 lines) No Connect GND VDD - VO = LCD Drive Voltage VR10 to 20 k VO VDD VDD - VO VR VDD (+5V) Power Supply Function LCD panel is driven by the voltage VDD -VO, so an adjustable VO is required for contrast control and temperature compensation. Temperature Variations Data bus line DB0-DB7 are for 8-bit operation DB4-DB7 are for 4-bit operation Temperature 0C +25C +50C Power Supply Block Diagram VDD -VO 5.00 4.75 4.50 Dimensional Outline 4/2/05 Purdy Electronics Corporation * 720 Palomar Avenue * Sunnyvale, CA 94085 Tel: 408.523.8200 * Fax: 408.733.1287 * email@purdyelectronics.com * www.purdyelectronics.com 2 AND791GST/GST-LED Intelligent Character Display 3 Purdy Electronics Corporation * 720 Palomar Avenue * Sunnyvale, CA 94085 Tel: 408.523.8200 * Fax: 408.733.1287 * email@purdyelectronics.com * www.purdyelectronics.com 4/2/05 |
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