22 corey street, melrose, massachusetts 02176 phone (781) 665-1071 fax (781) 665-7379 website: http://www.cdi-diodes.com e-mail: mail@cdi-diodes.com figure 1 design data case: do-213aa , hermetically sealed glass case. (melf, sod-80, ll34) lead finish: tin / lead polarity: diode to be operated with the banded (cathode) end positive. mounting position: any. mounting surface selection: the axial coefficient of expansion (coe) of this device is approximately +6ppm/c. the coe of the mounting surface system should be selected to provide a suitable match with this device. maximum ratings operating temperature: -65c to +175c storage temperature: -65c to +175c dc power dissipation: 500mw @ +50c power derating: 4 mw / c above +50c reverse leakage current l r = 10 a @ 25c & v r = 5.5vdc electrical characteristics @ 25c, unless otherwise specified. cdi zener zener maximum voltage temperature effective type voltage test zener temperature range temperature number current impedance stability coefficient v z @ i zt i zt z zt ? v zt maximum (note 1) (note 2) volts ma ohms mv c % / c cdll3154 8.00 - 8.80 10 15 130 -55 to +100 .01 cdll3154a 8.00 - 8.80 10 15 172 -55 to +150 .01 cdll3155 8.00 - 8.80 10 15 65 -55 to +100 .005 cdll3155a 8.00 - 8.80 10 15 86 -55 to +150 .005 cdll3156 8.00 - 8.80 10 15 26 -55 to +100 .002 cdll3156a 8.00 - 8.80 10 15 34 -55 to +150 .002 cdll3157 8.00 - 8.80 10 15 13 -55 to +100 .001 cdll3157a 8.00 - 8.80 10 15 17 -55 to +150 .001 note 1 zener impedance is derived by superimposing on l zt a 60hz rms a.c. current equal to 10% of l zt . note 2 the maximum allowable change observed over the entire temperature range i.e., the diode voltage will not exceed the specified mv at any discrete temperature between the established limits, per jedec standard no.5. ? 1n3154ur-1 thru 1n3157ur-1 available in jan, jantx, jantxv and jans per mil-prf-19500/158 ? temperature compensated zener reference diodes ? leadless package for surface mount ? 8.4 volt nominal zener voltage ? metallurgically bonded, double plug construction 1n3154ur-1 thru 1n3157ur-1 and cdll3154 thru cdll3157a millimeters inches dim min max min max d 1.60 1.70 0.063 0.067 f 0.41 0.55 0.016 0.022 g 3.30 3.70 .130 .146 g1 2.54 ref. .100 ref. s 0.03 min. .001 min.
cdll3154 thru cdll3157a 0 25 50 75 100 125 150 175 t a , ambient temperature (c) figure 2 power derating curve 600 500 400 300 200 100 0 pd, rated power dissipation (mw) operating current l zt (ma) figure 3 zener impedance vs. operating current 100 50 10 5 1 zener impedance z zt (ohms) 6 8 10 12 14 operating current l zt (ma) figure 4 typical change of temperature coefficient with change in operating current +.0015 +.0010 +.0005 0 -.0005 -.0010 -.0015 change in temperature coefficient ( %/c) 8 9 10 11 12 13
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