BRIGHT LED ELECTRONICS CORP. BM-40K57MD SINCE 1981 ● Features : 1. 4.2 inch (106.20mm) matrix height. 2. Dot size 10.0mm. 3. Low power requirement. 4. Excellent characters appearance. 5. Solid state reliability. 6. Multiplex drive , column anode com and ● Package Dimensions : row cathode com. 7. Single color available. 8. Categorized for luminous intensity. 9. Stackable vertically and horizontally. ● 1. Description : The BM-40K57MD is a 106.20mm(4.2") matrix height 5×7 dot matrix display. 2. This product use super yellow chips, which are made from AlGaInP on GaAs substrate. 3. 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 have a black face and white dots. 4. This product doesn't contain restriction substance, comply ROHS standard. ● Internal Circuit Diagram : Ver.2.0 Page 1 of 3 BRIGHT LED ELECTRONICS CORP. BM-40K57MD SINCE 1981 ● Absolute Maximum Ratings(Ta=25℃) Parameter Symbol Rating Unit Power Dissipation Per Dot Pd 160 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 - 4.2 5.0 V Luminous Intensity Per Dot Iv IF=10mA - 35.0 - mcd Reverse Current Per Dot IR VR=5V - - 100 µA Peak Wave Length λp IF=10mA - 590 - nm Dominant Wave Length λd IF=10mA 582 592 nm Spectral Line Half-width ∆λ IF=10mA - - nm 15 Ver.2.0 Page 2 of 3 BRIGHT LED ELECTRONICS CORP. BM-40K57MD 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 0 500 530 560 Fig.2 Forward Current VS. Forward Voltage 40 30 20 10 0 590 Wavelength(nm) Relative Luminous Intensity (@20mA) Forward Current (mA) 50 1 2 3 4 5 Fig.4 Relative Luminous Intensity VS. Forward Current 2.0 1.0 0.0 10 20 30 40 Forward Current(mA) 3.0 50 650 680 Fig.3 Relative Luminous Intensity VS. Ambient Temperature 2.5 2.0 1.5 1.0 0.5 0 -40 50 Forward Current(mA) 3.0 620 -20 0 20 40 60 Ambient Temperature Ta( C) Forward Voltage (V) Relative Luminous Intensity (@20mA) ● Fig.5 Forward Current Derating Curve VS. Ambient Temperature 40 30 20 10 0 20 40 60 80 100 120 Ambient Temperature Ta( C) Ver.2.0 Page 3 of 3