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 5×7 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 : 佰鴻工業股份有限公司 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 µA λp IF=10mA - 568 - nm Peak Wave Length 佰鴻工業股份有限公司 http://www.brtled.com Dominant Wave Length λd IF=10mA 569 - 574 nm Spectral Line Half-width ∆λ 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 佰鴻工業股份有限公司 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