BRIGHT LED ELECTRONICS CORP. BM-11257ND SINCE 1981 1.252 inch (31.80mm) matrix height. 2. Dot size 3.0mm. 3. Low power requirement. 4. Excellent characters appearance. 5. Solid state reliability. 6. Multiplex drive , column cathode com. Package Dimensions : 4.57x4=18.28(.720) PIN 1. and row anode com. 7. Single color available. 8. Categorized for luminous intensity. 9. Stackable vertically and horizontally. 22.86(.900) 1. 31.80(1.252) Features : 4.57x6=27.42(1.080) + 22.75(.896) 3.0x35 (.118x35) 8.00(.315) 3.0(.118)MIN 0.50(.020) 2.54x6=15.24(.600) 1. Description : The BM-11257ND is a 31.8mm(1.252") matrix height 5x7 dot matrix display. 2. This product use green chips, which are made from GaP on GaP substrate. 3. This product have a black face and white dots. 4. Notes: 1. All dimensions are in millimeters(inches). 2. Tolerance is 0.25mm(.01")unless otherwise specified. 3. Specifications are subject to change without notice. This product doesn't contain restriction substance, comply ROHS standard. Internal Circuit Diagram : http://www.brtled.com Ver.2.0 Page 1 of 3 BRIGHT LED ELECTRONICS CORP. BM-11257ND SINCE 1981 Absolute Maximum Ratings(Ta=25) Parameter Symbol Rating Unit Power Dissipation Per Dot Pd 80 mW Forward Current Per Dot IF 30 mA IFP (Duty 1/10, 1KHZ) 150 mA VR 5 V Operating Temperature Topr -40~80 - Storage Temperature Tstg -40~85 - Soldering Temperature (1/16" From Body) Tsol 260 For 5 Seconds - Peak Forward Current Per Dot Reverse Voltage Per Dot Electrical And Optical Characteristics(Ta=25) Parameter Symbol Condition Min. Typ. Max. Unit Forward Voltage Per Dot VF IF=10mA - 2.1 2.5 V Luminous Intensity Per Dot Iv IF=10mA - 10.0 - mcd Reverse Current Per Dot IR VR=5V - - 100 A p IF=10mA - 568 - nm Peak Wave Length http://www.brtled.com Dominant Wave Length d IF=10mA 569 - 574 nm Spectral Line Half-width IF=10mA - 30 - nm Ver.2.0 Page 2 of 3 BRIGHT LED ELECTRONICS CORP. BM-11257ND SINCE 1981 Typical Electro-Optical Characteristics Curves (25 Ambient Temperature Unless Otherwise Noted) Fig.1 Relative Radiant Intensity VS. Wavelength Relative Radiant Intensity 1.0 0.5 0 460 490 520 550 Wavelength(nm) Fig.2 Forward Current VS. Forward Voltage Relative Luminous Intensity (@20mA) Forward Current (mA) 50 40 30 20 10 0 1 2 3 4 5 3.0 580 3.0 610 640 Fig.3 Relative Luminous Intensity VS. Ambient Temperature 2.5 2.0 1.5 1.0 0.5 0 -40 -20 0 20 40 60 Ambient Temperature Ta( C) Forward Voltage (V) Fig.4 Relative Luminous Intensity VS. Forward Current 50 Fig.5 Forward Current Derating Curve VS. Ambient Temperature http://www.brtled.com Forward Current(mA) Relative Luminous Intensity (@20mA) 2.0 1.0 0.0 0 10 20 30 40 Forward Current(mA) 50 40 30 20 10 0 20 40 60 80 100 120 Ambient Temperature Ta( C) Ver.2.0 Page 3 of 3