LTP-3784/3786 Series Features Package Dimensions 0.54 inch (13.8mm) digit height. Continuous uniform segments. Choices of five bright colors-AlGaAs red/bright red/ green/yellow/red orange. Low power requirements. Excellent character appearance. Wide viewing angle. Solid state reliability. Common anode or common cathode models. Categorized for luminous intensity. Easy mounting on P.C. board. Description The LTP-3784/3786 series are 0.54 inch (13.8mm) height 14-segment dual digit alphanumeric displays. The Dis- plays have gray face and white segment. The AlGaAs red alphanumeric display are designed for applications requiring low power consumption. They are tested and selected for their excellent low current characteristics to ensure that the segments are matched at low current. Drive current as low as 1 mA per segment is available. The AlGaAs red series device utilize LED chips which Notes: All dimensions are in millimeters(inches). are made from AlGaAs on a non-transparent GaAs Tolerance: 0.25mm (0.010 ) unless other- substrate. The bright red and green series devices uti- wise noted. lize LED chips which are made from GaP on a transpar- ent GaP substrate. The yellow and red orange series devices utilize LED chips which are made from GaAsP on a transparent GaP substrate. Devices Part No. Internal Circuit Description Red AlGaAs Red Bright Red Green Yellow Diagram Orange LTP-3784WC-01 LTP-3784P-01 LTP-3784G-01 LTP-3784Y-01 LTP-3784E-01 Duplex Common Cathode, Rt. Hand Decimal A LTP-3786WC-03 LTP-3786P-03 LTP-3786G-03 LTP-3786Y-03 LTP-3786E-03 Duplex Common Anode, Rt. Hand Decimal B Internal Circuit Diagrams A. LTP-3784 9-184 15-p378x.p65 Page 184 2000/7/11, U 07:29Adobe PageMaker 6.5C/WinB. LTP-3786 Pin Connection Connection Pin No. A. LTP-3784 B. LTP-3786 1 Anode E Cathode E 2 Anode M Cathode M 3 No Connection No Connection 4 Anode L Cathode L 5 Anode K Cathode K 6 Anode J Cathode J 7 Anode D Cathode D 8 Anode D.P. Cathode D.P. 9 Anode C Cathode C 10 Anode B Cathode B 11 Common Cathode, Character 2 Common Anode, Character 2 12 Anode A Cathode A 13 Anode N Cathode N 14 Anode H Cathode H 15 Anode G Cathode G 16 Common Cathode, Character 1 Common Anode, Character 1 17 Anode P Cathode P 18 Anode F Cathode F Absolute Maximum Rating at Ta=25 Red AlGaAs Parameter Bright Red Green Yellow Unit Orange Red Average Power Dissipation Per Segment 75 40 75 60 75 mW Peak Forward Current Per Segment 125 60 100 80 100 mA (1/10 Duty Cycle, 0.1 ms Pulse Width) Average Forward Current Per Segment 30 15 25 20 25 mA 0.4 0.2 0.33 0.27 0.33 mA/ Derating Linear from 25 Per Segment Reverse Voltage Per Segment 5 5 5 5 5 V Operating Temperature Range -35 to +85 Storage Temperature Range -35 to +85 Solder Temperature 1/16 Inch Below Seating Plane for 3 Seconds at 260 9-185 DISPLAYS