lite-on electronics, inc. property of lite-on only part no.: LTP-2157AKR page: 1 of 5 bns-od-c131/a4 features ? 2.0 inch (50.8 mm) matrix height. ? low power requirement. ? single plane, wide viewing angle. ? solid state reliability. ? 5 ?? 7 array with x-y select. ? compatible with usascii and ebcdic codes. ? stackable horizontally. ? categorized for luminous intensity. description the LTP-2157AKR is a 2.0 inch (50.8 mm) matrix height 5 ?? 7 dot matrix display. this devi ce utilizes alingap super red led chips, which are made from alingap on a non-transparent gaas substrate and has a gray face and white dot color. device part no. description alinaap super red LTP-2157AKR cathode column anode row
lite-on electronics, inc. property of lite-on only part no.: LTP-2157AKR page: 2 of 5 bns-od-c131/a4 package dimensions notes: all dimensions are in millimeters. tolerances are 0.25 mm (0.01?) unless otherwise noted. internal circuit diagram
lite-on electronics, inc. property of lite-on only part no.: LTP-2157AKR page: 3 of 5 bns-od-c131/a4 pin connection no. connection 1 anode row 5 2 cathode row 7 3 anode column 2 4 anode column 3*1 5 cathode row 4*2 6 anode column 5 7 anode row 6 8 anode row 3 9 anode row 1 10 cathode column 4 11 cathode column 3*1 12 anode row 4*2 13 cathode column 1 14 anode row 2 notes : 1. pin 4 & 11 are internally connected. 2. pin 5 & 12 are internally connected.
lite-on electronics, inc. property of lite-on only part no.: LTP-2157AKR page: 4 of 5 bns-od-c131/a4 absolute maximum rating at ta=25 o c parameter maximum rating unit average power dissipation per dot 70 mw peak forward current per dot 90 ma average forward current per dot derating linear from 25 j per dot 15 0.2 ma ma/ j reverse voltage per dot 5 v operating temperature range -35 j to +85 j storage temperature range -35 j to +85 j solder temperature: max 260 j for max 3sec at 1.6mm[1/16inch] below seating plane. electrical / optical characteristics at ta=25 o c parameter symbol min. typ. max. unit test condition average luminous intensity i v 1650 3500 cd i p =32ma 1/16duty peak emission wavelength p 639 nm i f =20ma spectral line half-width ? 20 nm i f =20ma dominant wavelength d 631 nm i f =20ma 2 2.6 i f =20ma forward voltage any dot v f 2.3 2.8 v i f =80ma reverse current any dot i r 100 av r =5v luminous intensity matching ratio i v -m 2:1 i p =32ma 1/16duty note: luminous intensity is measured with a light sensor and filter combination that approximates the cie (commision internationale de l?eclairage) eye-response curve.
lite-on electronics, inc. property of lite-on only part no.: LTP-2157AKR page: 5 of 5 bns-od-c131/a4 typical electrical / optical characteristic curves (25 o c ambient temperature unless otherwise noted)
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