1N935BUR-1 thru 1N938BUR-1 and * 1N935BUR-1, 1N937BUR-1 and 1N938BUR-1 AVAILABLE IN JAN, JANTX, JANTXV AND JANS PER MIL-PRF-19500/156 * TEMPERATURE COMPENSATED ZENER REFERENCE DIODES CDLL935 thru CDLL938B * LEADLESS PACKAGE FOR SURFACE MOUNT * 9.0 VOLT NOMINAL ZENER VOLTAGE * METALLURGICALLY BONDED, DOUBLE PLUG CONSTRUCTION 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 & VR = 6 Vdc ELECTRICAL CHARACTERISTICS @ 25C, unless otherwise specified. CDI TYPE NUMBER ZENER VOLTAGE VZ@ I ZT ZENER TEST CURRENT I ZT MAXIMUM VOLTAGE TEMPERATURE ZENER TEMPERATURE RANGE IMPEDANCE STABILITY ZZT V ZT EFFECTIVE TEMPERATURE COEFFICIENT MAXIMUM (Note 1) (Note 2) DIM D F G G1 S MILLIMETERS INCHES MIN MAX MIN MAX 1.60 1.70 0.063 0.067 0.41 0.55 0.016 0.022 3.30 3.70 .130 .146 2.54 REF. .100 REF. 0.03 MIN. .001 MIN. VOLTS mA OHMS mV C % / C CDLL935 CDLL935A CDLL935B 8.55 - 9.45 8.55 - 9.45 8.55 - 9.45 7.5 7.5 7.5 20 20 20 67 139 184 0 to + 75 -55 to +100 -55 to +150 0.01 0.01 0.01 DESIGN DATA CDLL936 CDLL936A CDLL936B 8.55 - 9.45 8.55 - 9.45 8.55 - 9.45 7.5 7.5 7.5 20 20 20 34 70 92 0 to + 75 -55 to +100 -55 to +150 0.005 0.005 0.005 CASE: DO-213AA, Hermetically sealed glass case. (MELF, SOD-80, LL34) CDLL937 CDLL937A CDLL937B 8.55 - 9.45 8.55 - 9.45 8.55 - 9.45 7.5 7.5 7.5 20 20 20 13 28 37 0 to + 75 -55 to +100 -55 to +150 0.002 0.002 0.002 LEAD FINISH: Tin / Lead CDLL938 CDLL938A CDLL938B 8.55 - 9.45 8.55 - 9.45 8.55 - 9.45 7.5 7.5 7.5 20 20 20 6.7 13.9 19 0 to + 75 -55 to +100 -55 to +150 0.001 0.001 0.001 FIGURE 1 POLARITY: Diode to be operated with the banded (cathode) end positive. MOUNTING POSITION: Any. NOTE 1 Zener impedance is derived by superimposing on lZTA 60Hz rms a.c. current equal to 10% of lZT. 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. 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. 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 Pd, Rated Power Dissipation (mW) CDLL935 thru CDLL938B 600 500 400 300 200 100 0 0 25 50 75 100 125 150 TL, Ambient temperature (C) FIGURE 2 POWER DERATING CURVE ZENER IMPEDANCE ZZT (OHMS) 100 50 40 30 20 10 5 4 3 2 1 5 6 7 8 9 OPERATING CURRENT lZT (mA) 10 FIGURE 3 ZENER IMPEDANCE VS. OPERATING CURRENT CHANGE IN TEMPERATURE COEFFICIENT ( %/C) +.0015 +.0010 +.0005 0 -.0005 -.0010 -.0015 5 6 7 8 OPERATING CURRENT lZT (mA) 9 FIGURE 4 TYPICAL CHANGE OF TEMPERATURE COEFFICIENT WITH CHANGE IN OPERATING CURRENT 10 175