LITE-ON TECHNOLOGY CORPORATION Property of Lite-On Only LED DISPLAY LTP-2557C DATA SHEET Rev - By Original Spec A Define F/M at 10mil (page 2). SPEC. NO.: DATE Description : PART NO.:LTP-2557C BNS-OD-C131/A4 PHANOMKORN J DS-30-98-476 08/NOV/06 REV. NO. : PAGE NO. : Ruby Lee A 0 OF 5 PAGE: 0 of 6 LITE-ON TECHNOLOGY CORPORATION Property of Lite-On Only FEATURES * 2 inch (50.8 mm) MATRIX HEIGHT. * LOW POWER REQUIREMENT. * SINGLE PLANE, WIDE VIEWING ANGLE * SOLID STATE RELIABILITY. * 5x7 ARRAY WITH X-Y SELECT. * COMPATIBLE WITH USASCLL AND EBCDIC CODES. * STACKABLE HORIZONTALLY. * CATEGORIZED FOR LUMINOUS INTENSITY. ＊LEAD-FREE PACKAGE(ACCORDING TO ROHS) DESCRIPTION The LTP-2557C is a 2 inch (50.8 mm) matrix height 5x7 dot matrix display. This device utilizes AlGaAs red LED chips, which are made from AlGaAs on a non-transparent GaAs substrate, and has a gray face and white dot color. DEVICE PART NO. DESCRIPTION AlGaAs Red Cathode Column Anode Row LTP-2557C PART NO.:LTP-2557C BNS-OD-C131/A4 PAGE: 1 of 6 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. 3. Maximum foreign material size is 10 mils PART NO.:LTP-2557C BNS-OD-C131/A4 PAGE: 2 of 6 LITE-ON TECHNOLOGY CORPORATION Property of Lite-On Only INTERNAL CIRCUIT DIAGRAM PART NO.:LTP-2557C BNS-OD-C131/A4 PAGE: 3 of 6 LITE-ON TECHNOLOGY CORPORATION Property of Lite-On Only PIN CONNECTION No. 1 ANODE ROW 5 2 ANODE ROW 7 3 CATHODE COLUMN 2 4 CATHODE COLUMN 3 5 6 CATHODE ROW 4 COLUMN 5 ANODE ROW 6 8 ANODE ROW 3 9 ANODE ROW 1 10 CATHODE COLUMN 4 11 CATHODE COLUMN 3 13 14 BNS-OD-C131/A4 ANODE 7 12 PART NO.:LTP-2557C CONNECTION ANODE ROW 4 CATHODE COLUMN 1 ANODE ROW 2 PAGE: 4 of 6 LITE-ON TECHNOLOGY CORPORATION Property of Lite-On Only ABSOLUTE MAXIMUM RATING AT TA=25oC MAXIMUM RATING UNIT Average Power Dissipation Per Dot 36 mW Peak Forward Current Per Dot 125 mA Average Forward Current Per Dot Derating Linear From 250C Per Dot 15 0.20 mA mA/0C PARAMETER Reverse Voltage Per Dot 5 V 0 0 Operating Temperature Range -35 C to +85 C Storage Temperature Range -350C to +850C 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. TEST CONDITION µcd Ip=80mA 1/16DUTY Average Luminous Intensity IV Peak Emission Wavelength λp 660 nm IF=20mA Spectral Line Half-Width ∆λ 35 nm IF=20mA Dominant Wavelength λd 638 nm IF=20mA Forward Voltage any Dot VF Reverse Current any Dot Luminous Intensity Matching Ratio (Similar Light Area) 6200 12000 UNIT 1.8 2.4 V IF=20mA 2 3.1 V IF=80mA IR 100 µA VR=5V IV-m 2:1 Ip=80mA 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-2557C BNS-OD-C131/A4 PAGE: 5 of 6 LITE-ON TECHNOLOGY CORPORATION Property of Lite-On Only TYPICAL ELECTRICAL / OPTICAL CHARACTERISTIC CURVES (25oC Ambient Temperature Unless Otherwise Noted) PART NO.:LTP-2557C BNS-OD-C131/A4 PAGE: 6 of 6