LITE-ON TECHNOLOGY CORPORATION Property of Lite-On Only FEATURES ＊2.0 inch (50.8 mm) MATRIX HEIGHT. ＊LOW POWER REQUIREMENT. ＊EXCELLENT CHARACTERS APPEARANCE.. ＊HIGH BRIGHTNESS & HIGH CONTRAST. ＊5×7 ARRAY WITH X-Y SELECT. ＊HIGH BRIGHTNESS & HIGH CONTRAST. ＊SOLID STATE RELIABILITY. ＊LEAD-FREE PACKAGE(ACCORDING TO ROHS) DESCRIPTION The LTP-2157AKS is a 2.0 inch (50.8 mm) matrix height 5×7 dot matrix display. This device utilizes AlInGaP Yellow LED chips, which are made from AlInGaP on a non-transparent GaAs substrate, and has a black face and white dot color. DEVICE PART NO. DESCRIPTION AlInGaP Yellow CATHODE COLUMN ANODE ROW LTP-2157AKS PART NO.: LTP-2157AKS BNS-OD-C131/A4 PAGE: 1 of 5 LITE-ON TECHNOLOGY CORPORATION Property of Lite-On Only PACKAGE DIMENSIONS NOTES: 1. All dimensions are in millimeters. Tolerances are ± 0.25 mm unless otherwise note. 2. Pin tip’s shift tolerance is ± 0.4 mm. INTERNAL CIRCUIT DIAGRAM PART NO.: LTP-2157AKS BNS-OD-C131/A4 PAGE: 2 of 5 LITE-ON TECHNOLOGY CORPORATION Property of Lite-On Only PIN CONNECTION No. CONNECTION 1 ANODE ROW 5 2 ANODE ROW 7 3 CATHODE COLUMN 2 4 CATHODE COLUMN 3*1 5 ANODE ROW 4*2 6 CATHODE 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-2157AKS BNS-OD-C131/A4 PAGE: 3 of 5 LITE-ON TECHNOLOGY CORPORATION 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 60 mA Average Forward Current Per Dot Derating Linear From 25℃ Per Dot 25 0.28 mA mA/℃ Reverse Voltage Per Dot Operating Temperature Range 5 -35℃ to +105℃ Storage Temperature Range -35℃ to +105℃ V Soldering Conditions: 1/16 inch below seating plane for 3 seconds at 2600C or of temperature unit (during assembly) not over max temperature rating above. ELECTRICAL / OPTICAL CHARACTERISTICS AT Ta=25oC PARAMETER SYMBOL MIN. TYP. MAX. UNIT TEST CONDITION Average Luminous Intensity IV 2100 3600 µcd Ip=32mA 1/16Duty Peak Emission Wavelength λp 588 nm IF=20mA Spectral Line Half-Width ∆λ 15 nm IF=20mA Dominant Wavelength λd 587 nm IF=20mA Forward Voltage Per Segment VF 2.05 2.6 V IF=20mA Reverse Current any Dot IR 100 µA VR=5V IV-m 2:1 Luminous Intensity Matching Ratio (Similar Light Area) IF=1mA 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-2157AKS BNS-OD-C131/A4 PAGE: 4 of 5 LITE-ON TECHNOLOGY CORPORATION Property of Lite-On Only TYPICAL ELECTRICAL / OPTICAL CHARACTERISTIC CURVES (25oC Ambient Temperature Unless Otherwise Noted) PART NO.: LTP-2157AKS BNS-OD-C131/A4 PAGE: 5 of 5