175 note 1 zener voltage range equals nominal voltage + 5% for ?a? suffix types. no suffix denotes + 10%. "c" suffix = + 2% and "d" suffix = + 1%. note 2 zener voltage is read using a pulse measurement, 10 milliseconds maximum. note 3 zener impedance is derived by superimposing on 1 zt a 60hz rms a.c. current equal to 10% of 1 zt . maximum ratings operating temperature: -65c to +175c storage temperature: -65c to +175c forward voltage @ 200ma: 1.5 volts maximum backside is cathode figure 1 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 electrical characteristics @ 25c cdi nominal zener maximum maximum maximum type zener test zener reverse current zener number voltage current impedance i r @ v r current v z @ i zt i zt (note 3) 1 zm (note 1) (note 2) z zt @ i zt volts ma ohms a volts ma cd4370a 2.4 20 30 100 1.0 155 cd4371a 2.7 20 30 75 1.0 140 cd4372a 3.0 20 29 50 1.0 125 CD746A 3.3 20 28 10 1.0 120 cd747a 3.6 20 24 5 1.0 110 cd748a 3.9 20 23 5 1.0 100 cd749a 4.3 20 22 2 1.0 90 cd750a 4.7 20 19 5 1.5 85 cd751a 5.1 20 17 5 2.0 75 cd752a 5.6 20 11 5 2.5 70 cd753a 6.2 20 7 5 3.5 65 cd754a 6.8 20 5 2 4.0 60 cd755a 7.5 20 6 2 5.0 55 cd756a 8.2 20 8 1 6.0 50 cd757a 9.1 20 10 1 7.0 45 cd758a 10.0 20 17 1 8.0 40 cd759a 12.0 20 30 1 9.0 35 ? 1n746a thru 1n759a available in janhc and jankc per mil-prf-19500/127 ? 1n4370a thru 1n4372a available in janhc and jankc per mil-prf-19500/127 ? zener diode chips ? 0.5 watt capability with proper heat sinking ? compatible with all wire bonding die attach techniques, with the exception of solder reflow CD746A thru cd759a and cd4370a thru cd4372a 23 mils 15 mils 15 mils 23 mils 6 lake street, lawrence, massachusetts 01841 phone (978) 620-2600 fax (978) 689-0803 website: http://www.microsemi.com
176 CD746A thru cd759a and cd4370a thru cd4372a .1 .2 .5 1 2 5 10 20 50 100 operating current i zt (ma) figure 3 zener impedance vs. operating current zener impedance z zt (ohms) 1000 500 400 300 200 100 50 40 30 20 10 5 4 3 2 1 5.1 volt 6.2 volt 3.3 volt
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