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LED
Red LED
L7868 series
Small emission spot, red LED using current confined chip
L7868/-02 are red LEDs with a microball lens bonded to the current-confined structure chip surface. L7868-01 uses the same structure LED chip with no microball lens and provides a smaller emission spot of 150 m. L7868-02 uses a glass lens window for even narrower directivity (beam spread).
Features
L7868: 400 m L7868-01: 150 m l Uniform emission pattern l Narrow directivity: L7868-02
Applications
l Small emission spot
l Optical switches l Automatic control system
s Absolute maximum ratings (Ta=25 C, unless otherwise noted)
Parameter Symbol Condition Reverse voltage V4 Forward current I. Forward current Ta > 25 C derating rate Pulse forward Pulse width=10 s I.2 current Duty ratio=1 % Pulse forward Ta > 25 C current derating rate Power dissipation P Operating Topr temperature Storage temperature Tstg
Value 3 60 0.8 0.5 7 180 -30 to +85 -40 to +100
Unit V mA mA/C A mA/C mW C C
s Electrical and optical characteristics (Ta=25 C)
Parameter Peak emission wavelength Spectral half width (FWHM) Radiant flux Radiant illuminance Forward voltage Pulse forward voltage Reverse current Rise time Fall time Symbol lp Dl fe PV. V.2 I4 tr tf Condition I.=20 mA I.=20 mA I.=20 mA I.=20 mA I.=20 mA I.=0.5 A V4=3 V I.=20 mA, 10 % to 90 % I.=20 mA, 90 % to 10 % L7868 Min. 650 0.35 Typ. 670 20 0.45 0.1 1.9 4.3 0.06 0.06 Max. 700 2.2 5.5 10 0.1 0.1 Min. 650 0.15 L7868-01 Typ. 670 20 0.2 1.9 4.3 0.06 0.06 Max. 700 2.2 5.5 10 0.1 0.1 Min. 650 0.35 L7868-02 Typ. 670 20 0.45 0.4 1.9 4.3 0.06 0.06 Max. 700 2.2 5.5 10 0.1 0.1 Unit nm nm mW mW/cm V V A s s
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