AND791GST ETC1

Document overview

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Technical content

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) Dot Matrix Dimensions Mechanical Characteristics Item Specification Unit Outline Dimensions 190.0 (W) x 54.0 (H) x 10 (D) mm Character Size 2.78 (W) x 4.89 (H) mm Viewing Area 147.0 (W) x 29.5 (H) mm Dot Size 0.50 x 0.55 mm Dot Pitch 0.57 x 0.62 mm Absolute Maximum Ratings Item Symbol Rating Unit Supply Voltage V DD 7.0 V Input Voltage V IN V IN V DD V LED Forward Current I F 960 mA LED Reverse Voltage V R 0.752.78 1.20 4.89 LED Power Dissipation P D 4160 mW Operating Temperature T op 0 to +50 °C Storage Temperature T stg –20 to +70 °C Electrical Characteristics (TA = 25°C) Item Symbol Min. Typ. Max. Unit Supply Voltage V DD 4.75 5.00 5.25 V V DD O 3.0 – 6.3 High Level In Voltage V IH 2.2 — V DD V Low Level In Voltage OH = 0.2 mA) V IL 0 — 0.6 V High Level Output Volt. (–I OH = 0.2 mA) V OH 2.4 — — V Low Level Output Volt. OL = 1.2 mA) V OL — — 0.4 V LED Forward Voltage F = 480 mA) V F 3.8 4.1 4.4 V LED Reverse Current R = 8 V) I R – – 4.8 mA Optical Characteristics (TA = 25˚C, φ = 0°, θ = 0°) Item Symbol Min. Typ. Max. Unit Viewing Angle φ – 50 – degree Contrast K – 6.0 – – Response time (rise) T on — 140 170 ms Response time (fall) T off — 160 190 ms Absolute Maximum Ratings (Continued) Item Symbol Rating Unit 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.

Intelligent Character Display AND791GST/GST-LED Purdy Electronics Corporation • 720 Palomar Avenue • Sunnyvale, CA 94085 4/2/05 Power Supply LCD panel is driven by the voltage V DD O , so an adjustable V O is required for contrast control and temperature compensation. Power Supply Block Diagram Dimensional Outline Connector Pin Assignment Pin No. Signal Function 1 DB Data bus line DB0-DB7 are for 8-bit operation DB4-DB7 are for 4-bit operation 2 DB 3 DB 4 DB 5 DB 6 DB 7 DB 8 DB 9 E Enable (for upper 2 lines) 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 V O Liquid crystal driving voltage

13 GND Ground

Enable (for lower 2 lines)

16 NC No Connect

V O 0°C 5.00 +25°C 4.75 +50°C 4.50 VDD VO GND VDD – VO VDD – VO = LCD Drive Voltage VR10 to 20 kΩ VR VDD (+5V)

Intelligent Character Display AND791GST/GST-LED Purdy Electronics Corporation • 720 Palomar Avenue • Sunnyvale, CA 94085 4/2/05