23 mils 15 mils 15 mils 23 mils 199 ? zener diode chips ? all junctions completely protected with silicon dioxide ? electrically equivalent to 1n4728a thru 1n4764a ? 1 watt capability with proper heat sinking ? compatible with all wire bonding and die attach techniques, with the exception of solder reflow cd4728a thru cd4764a design data metallization: top: (anode)....................al back: (cathode)............. au al thickness ...... .....25,000 ? min gold thickness ........4,000 ? min chip thickness ..................10 mils circuit layout data: for zener operation, cathode must be operated positive with respect to anode. tolerances: all dimensions + 2 mils maximum ratings operating temperature: -65c to +175c storage temperature: -65c to +175c forward voltage @ 200 ma: 1.5 volts maximum electrical characteristics @ 25c, unless otherwise speci?ed nominal maximum maximum maximum type zener test zener reverse test knee test number voltage current impedance current voltage impedance current (v z )(l zt )(z zt @ l zt )(l r @ v r )(v r )(z zk )(l zk ) (note 1) (note 2) (note 2) volts ma ohms a volts ohms ma cd4728a 3.3 76 10 100 1 400 1.0 cd4729a 3.6 69 10 100 1 400 1.0 cd4730a 3.9 64 9 100 1 400 1.0 CD4731a 4.3 58 9 10 1 400 1.0 cd4732a 4.7 53 8 10 1 500 1.0 cd4733a 5.1 49 7 5 1 550 1.0 cd4734a 5.6 45 5 5 2 600 1.0 cd4735a 6.2 41 2 5 3 700 1.0 cd4736a 6.8 37 3.5 3 4 700 1.0 cd4737a 7.5 34 4.0 3 5 700 0.5 cd4738a 8.2 31 4.5 3 6 700 0.5 cd4739a 9.1 28 5.0 3 7 700 0.5 cd4740a 10 25 7 3 7.6 700 0.25 cd4741a 11 23 8 2 8.4 700 0.25 cd4742a 12 21 9 1 9.1 700 0.25 cd4743a 13 29 10 0.5 9.9 700 0.25 cd4744a 15 17 14 0.1 11.4 700 0.25 cd4745a 16 15.5 16 0.1 12.2 700 0.25 cd4746a 18 14 20 0.1 13.7 750 0.25 cd4747a 20 12.5 22 0.1 15.2 750 0.25 cd4748a 22 11.5 23 0.1 16.7 750 0.25 cd4749a 24 10.5 25 0.1 18.2 750 0.25 cd4750a 27 9.5 35 0.1 20.6 750 0.25 cd4751a 30 8.5 40 0.1 22.8 1000 0.25 cd4752a 33 7.5 45 0.1 25.1 1000 0.25 cd4753a 36 7.0 50 0.1 27.4 1000 0.25 cd4754a 39 6.5 60 0.1 29.7 1000 0.25 cd4755a 43 6.0 70 0.1 32.7 1500 0.25 cd4756a 47 5.5 80 0.1 35.8 1500 0.25 cd4757a 51 5.0 95 0.1 38.8 1500 0.25 cd4758a 56 4.5 110 0.1 42.6 2000 0.25 cd4759a 62 4.0 125 0.1 47.1 2000 0.25 cd4760a 68 3.7 150 0.1 51.7 2000 0.25 cd4761a 75 3.3 175 0.1 56.0 2000 0.25 cd4762a 82 3.0 200 0.1 62.2 3000 0.25 cd4763a 91 2.8 250 0.1 69.2 3000 0.25 cd4764a 100 2.5 350 0.1 76.0 3000 0.25 note 1 zener voltage range equals nominal zener voltage + 5% for ?a? suffix. no suffix denotes + 10%. zener voltage is read using a pulse measurement, 10 milliseconds maximum. "c" suffix = + 2% and "d" suffix = + 1%. note 2 zener impedance is derived by superimposing on l zt a 60hz rms a.c. current equal to 10% of l zt . backside is cathode figure 1 6 lake street, lawrence, massachusetts 01841 phone (978) 620-2600 fax (978) 689-0803 website: http://www.microsemi.com
200 cd4728a thru cd4764a .1 .2 .3 .4 .5 1 2 5 10 20 30 40 50 100 operating current l zt (ma) figure 3 zener impedance vs. operating current 1000 500 400 300 200 100 50 40 30 20 10 5 4 3 2 1 zener impedance z zt (ohms) 3.3 volt 5.1 volt 27 volt 11 volt 6.2 volt
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