Visible Light Emitting Diodes (Red) LN145W GaAlAs Red Light Emitting Diode Unit : mm 3.9±0.25 4.5±0.15 3.5±0.15 12.8 min. High-power output, high-efficiency High coupling characteristics and suits to a plastic fiber High-speed response : –3dB modulation of 10MHz 2.1±0.15 1.6±0.15 0.8±0.1 (2.95) Features Red light emission close to monochromatic light : λP = 700 nm Not soldered 0.8 max. 1.5±0.2 Light source for optical fiber communications, 2-1.2±0.3 2-0.45±0.15 Side-view flat resin package 1 2 2.54±0.2 0.45±0.2 Absolute Maximum Ratings (Ta = 25˚C) Parameter Power dissipation * Symbol Ratings Unit PD 120 mW Forward current (DC) IF 40 mA Pulse forward current IFP* 400 mA Reverse voltage (DC) VR 3 V Operating ambient temperature Topr –25 to +85 ˚C Storage temperature Tstg –30 to +100 ˚C 1: Cathode 2: Anode tw = 10 µs, Duty cycle = 10 % Electro-Optical Characteristics (Ta = 25˚C) Parameter Symbol Conditions min max Unit Radiant power PO IF = 20mA Peak emission wavelength λP IF = 20mA Spectral half band width ∆λ IF = 20mA 35 Forward voltage (DC) VF IF = 20mA 1.8 Reverse current (DC) IR VR = 3V Half-power angle θ The angle in which radiant intencity is 50% 80 IFP = 100mA 30 ns 10 MHz Response time tr , t f Cutoff frequency fC* *Cutoff frequency fC : Frequency at which 10 × log 2.5 typ 4 mW 700 nm nm 2.2 100 V µA deg. PO(at f = fC) =–3 P O ( at f = 1MHz) [Element moisture resistance] It is difficult to guarantee that the LN145W will meet the moisture resistance specifications (MIL-STD-202D) which are commonly guaranteed for semiconductors. 1