MTC-20400X GENERAL SPECIFICATION Item INTERFACE PIN ASSIGNMENT Content Pin No. Pin Out Number of Character 20x4 Module Size 98.5(W)x60.0(H)x10.5/14.5(D)mm Max Viewing Area 76.0(W)x25.2(H)mm Character Size 2.95(W)x4.75(H)mm Dot Size/Dot Pitch 0.55(W)x0.55(H)mm/0.60(W)x0.60(H)mm Backlight Without/EL/LED Options Gray STN/Yellow STN/Normal/Extended Temperature/Bottom/Top Viewing Function Description 1 V SS Ground 2 V DD Logic Circuit Power Supply 3 VO Power Supply for LCD Panel 4 RS Data/Instruction Register Select - 5 R/W - 6 E 7~14 DB0~DB7 15 BKL1 ELECTRICAL CHARACTERISTICS Item Power Supply for Logic Input Voltage LCM Recommend LCD Module Driving Voltage Power Supply Current for LCM Symbol Condition Min. Typ. Max. Unit Note V DD- V SS - 2.7 4.5 5.5 Volt V IL L level V SS 0 . 2 V DD - Volt V IH H level 0 . 8 V DD V DD - Volt T a = 0 °C 4.3 4.5 4.7 T a = 2 5 °C 4.4 4.6 4.8 T a = 5 0 °C 4.2 4.4 4.6 I DD( B / L O F F ) V DD= 5 V - 1.5 2.0 I LED V DD- V O= 4 . 6 V T a = 2 5 °C - 175 280 V DD= 5 V BLOCK DIAGRAM MECHANICAL Volt mA Read/Write Select Enable Signal 3-State I/O Data Bus - - Power Supply for Backlight. 100V/400Hz AC for EL, 4.2V or 120~180mA DC for LED backlight. Don't care if no backlight 16 BKL2 POWER SUPPLY