LITE-ON ELECTRONICS, INC. Property of Lite-On Only 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 device 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 Cathode Column Anode Row LTP-2157AKR PART NO.: LTP-2157AKR BNS-OD-C131/A4 PAGE: 1 of 5 LITE-ON ELECTRONICS, INC. Property of Lite-On Only PACKAGE DIMENSIONS NOTES: All dimensions are in millimeters. Tolerances are ± 0.25 mm (0.01“) unless otherwise noted. INTERNAL CIRCUIT DIAGRAM PART NO.: LTP-2157AKR BNS-OD-C131/A4 PAGE: 2 of 5 LITE-ON ELECTRONICS, INC. Property of Lite-On Only 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. PART NO.: LTP-2157AKR BNS-OD-C131/A4 PAGE: 3 of 5 LITE-ON ELECTRONICS, INC. Property of Lite-On Only ABSOLUTE MAXIMUM RATING AT Ta=25oC 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℃ Per Dot 15 0.2 mA mA/℃ Reverse Voltage Per Dot 5 -35℃ to +85℃ Operating Temperature Range V -35℃ to +85℃ Storage Temperature Range Solder Temperature: max 260℃ for max 3sec at 1.6mm[1/16inch] below seating plane. ELECTRICAL / OPTICAL CHARACTERISTICS AT Ta=25oC PARAMETER SYMBOL MIN. TYP. MAX. UNIT TEST CONDITION Average Luminous Intensity IV 1650 3500 µcd Ip=32mA 1/16Duty Peak Emission Wavelength λp 639 nm IF=20mA Spectral Line Half-Width ∆λ 20 nm IF=20mA Dominant Wavelength λd 631 nm IF=20mA Forward Voltage any Dot VF Reverse Current any Dot IR 100 IV-m 2:1 Luminous Intensity Matching Ratio 2 2.6 2.3 2.8 V µA IF=20mA IF=80mA VR=5V Ip=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. PART NO.: LTP-2157AKR BNS-OD-C131/A4 PAGE: 4 of 5 LITE-ON ELECTRONICS, INC. Property of Lite-On Only TYPICAL ELECTRICAL / OPTICAL CHARACTERISTIC CURVES (25oC Ambient Temperature Unless Otherwise Noted) PART NO.: LTP-2157AKR BNS-OD-C131/A4 PAGE: 5 of 5