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 • • • • • • • Absolute Maximum Ratings (Continued) 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) Item Symbol Rating Unit LED Power Dissipation PD 4160 mW Operating Temperature Top 0 to +50 °C Storage Temperature Tstg –20 to +70 °C Electrical Characteristics (TA = 25°C) Dot Matrix Dimensions Item 2.78 Symbol Min. Typ. Max. VDD 4.75 5.00 5.25 VDD -VO 3.0 – 6.3 High Level In Voltage VIH 1 2.2 — VDD V Low Level In Voltage (IOH = 0.2 mA) VIL 1 0 — 0.6 V High Level Output Volt. (–IOH = 0.2 mA) VOH 1 2.4 — — V Low Level Output Volt. (IOL = 1.2 mA) VOL 1 — — 0.4 V VF 3.8 4.1 4.4 V IR – – 4.8 mA 0.75 1.20 4.89 Supply Voltage Mechanical Characteristics Specification Unit LED Forward Voltage (IF = 480 mA) 190.0 (W) x 54.0 (H) x 10 (D) mm LED Reverse Current (VR = 8 V) Character Size 2.78 (W) x 4.89 (H) mm Viewing Area 147.0 (W) x 29.5 (H) mm 0.50 x 0.55 mm Item Outline Dimensions Dot Size Dot Pitch 0.57 x 0.62 mm Absolute Maximum Ratings Item Symbol Rating Unit Supply Voltage VDD 7.0 V Input Voltage VIN 0 ≤ VIN ≤ VDD V LED Forward Current IF 960 mA LED Reverse Voltage VR 8 V 1 Unit V Optical Characteristics (TA = 25˚C, φ = 0°, θ = 0°) Symbol Min. Typ. Max. Unit Viewing Angle Item φ – 50 – degree Contrast K – 6.0 – – Response time (rise) Ton — 140 170 ms Response time (fall) Toff — 160 190 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. Purdy Electronics Corporation • 720 Palomar Avenue • Sunnyvale, CA 94085 Tel: 408.523.8200 • Fax: 408.733.1287 • [email protected] • www.purdyelectronics.com 4/2/05 AND791GST/GST-LED Intelligent Character Display Power Supply Connector Pin Assignment Pin No. Signal 1 DB7 Function 2 DB6 3 DB5 4 DB4 5 DB3 6 DB2 7 DB1 8 DB0 9 E1 10 R/W L: Data write from MPU to LCM. H: Data read from LCM to MPU 11 RS L: Instruction code input. H: Data input 12 VO Liquid crystal driving voltage 13 GND Ground 14 VDD Power supply voltage + 5V 15 E2 Enable (for lower 2 lines) 16 NC No Connect 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 VDD –VO 0°C 5.00 +25°C 4.75 +50°C 4.50 Power Supply Block Diagram Enable (for upper 2 lines) (+5V) VDD VDD – VO VO VR VDD GND VDD – VO = LCD Drive Voltage VR10 to 20 kΩ Dimensional Outline 4/2/05 Purdy Electronics Corporation • 720 Palomar Avenue • Sunnyvale, CA 94085 Tel: 408.523.8200 • Fax: 408.733.1287 • [email protected] • 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 protected] • www.purdyelectronics.com 4/2/05