hfe4218 high power fiber optic led for ethernet applications not recommended for new designs hfe4218-321 see hfd4225-023 outline dimensions in inches (mm) description features industry standard st fiber connector 850 nm gaaias led designed to meet ieee ethernet standard 802.3 foirl 10base-fb/fl specification high reliability construction popular fiber dip package wave solderable non-conductive plastic st barrel the hfe4218 series is a gaalas 850 nanometer led designed to meet ieee ethernet 802.3 specifications. the led component is electrically isolated from the connector. the mechanical construction uses a high reliability st fiber-dip fiber optic connector/housing designed for easy mounting on printed circuit boards without the need for additional hardware. this connector accepts a wide variety of fiber sizes (50/125 micron through 100/140 micron) and is designed to meet the ethernet 802.3 specification utilizing a 62.5/125 micron diameter fiber cable. the led is designed to be driven with a 50% duty cycle at 100 ma (-311)/60 ma (-312) peak forward current for the electrical input signal. 0.150 0.100 0.200 0.13 0.500 0.400 1.095 0.500 0.100 0.150 pin 1 ident. 0.275 dia fiber052.dim fiber052.dim fiber201.tif pinout 1. nc 2. anode 3. cathode 4. nc 5. nc 6. anode 7. anode 8. nc pins 1,4, 5 and 8 are electrically common. st is a registered trademark of at & t. honeywell reserves the right to make changes in order to improve design and supply the best products possible. 80 h
hfe4218 high power fiber optic led for ethernet applications not recommended for new designs hfe4218-321 see hfd4225-023 test conditions typ electro-optical characteristics (t = 25?c unless otherwise stated) units min parameter symbol max fiber cou p led power pt ( avg ) i? = 100 ma peak [] w 15.8 50.0 63.1 HFE4218-311 na = 0.275 , 50% dut y c y cle dbm -18 -13.0 -12 i? = 60 ma peak [] w 15.8 45.0 63.1 hfe4218-312 na = 0.275 , 50% dut y c y cle dbm -18 -13.5 -12 i? = 100 ma forward volta g ev? v 1.85 2.20 HFE4218-311 i? = 60 ma v 1.60 1.90 hfe4218-312 i? = 10 a reverse volta g e b? v 1.0 5.0 i? = 100 ma dc peak wavelen g th ?? nm 850 HFE4218-311 i? = 60 ma dc nm 850 hfe4218-312 i? = 100 ma dc s p ectral bandwidth ? nm 60 HFE4218-311 i? = 60 ma dc nm 50 hfe4218-312 10-90% , 1.0 v prebias res p onse time t?/t? ns i? = 100 ma 610 HFE4218-311 i? = 60 ma 610 hfe4218-312 i? = 100 ma dc , sinusoidal analo g bandwidth bwe mhz 85 HFE4218-311 modulation i? = 60 ma dc , sinusoidal mhz 70 hfe4218-312 modulation pt tem p erature coefficient pt/t i? = 100 ma , +25?c < t < +80?c db/?c -0.017 HFE4218-311 i? = 60 ma , +25?c < t < +80?c db/?c -0.006 hfe4218-312 dc series resistance r? 4.0 v? = 0 v , f = 1 mhz ca p acitance c p f 70 heat sinked thermal resistance ?c/w 250 i? = 100 ma p eak 1.0 v prebias overshoot % 10 HFE4218-311 i? = 60 ma p eak 1.0 v prebias % 10 hfe4218-312 notes 1. hfe4218 is tested using a 10 meter length of 62.5/125 m dia. fiber cable. actual coupled power values may vary due to mec hanical alignment tolerances/procedures. absolute maximum ratings (25?c free-air temperature unless otherwise noted) -55 to +85?c storage temperature -40 to +85?c case operating temperature 260?c, 10 s lead solder temperature 100 ma continuous forward current (heat sinked) 1 v @ 10 a reverse voltage stresses greater than those listed under "absolute maximum ratings" may cause permanent damage to the device. this is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. exposure to absolute maximum rating conditions for extended periods of time may affect reliability. honeywell reserves the right to make changes in order to improve design and supply the best products possible. h 81
hfe4218 high power fiber optic led for ethernet applications not recommended for new designs hfe4218-321 see hfd4225-023 typical optical power output vs forward current fig. 1 fiber021.gra typical spectral output vs wavelength fig. 2 fiber105.gra typical optical power output vs case temperature fig. 3 fiber025.gra all performance curves show typical values description catalog listing order guide 100 ma high power led, for ethernet application HFE4218-311 60 ma high power led, for ethernet application hfe4218-312 under certain application conditions, the infrared optical output of this device may exceed class 1 eye safety limits, as defined by iec 825-1 (1993-11). do not use magnification (such as a microscope or other focusing equipment) when viewing the device's output. warnin g the inherent design of this component causes it to be sensitive to electrostatic discharge (esd). to prevent esd-induced damage and/or degradation to equipment, take normal esd precautions when handling this product. caution honeywell reserves the right to make changes in order to improve design and supply the best products possible. 82 h
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