• 1N941BUR-1, 1N943UR-1B, 1N944BUR-1 AND 1N945BUR-1 AVAILABLE IN JAN, JANTX, JANTXV AND JANS PER MIL-PRF-19500/157 • TEMPERATURE COMPENSATED ZENER REFERENCE DIODES 1N941BUR-1 thru1N945BUR-1 and CDLL941 thru CDLL945B • LEADLESS PACKAGE FOR SURFACE MOUNT • 11.7 VOLT NOMINAL ZENER VOLTAGE • METALLURGICALLY BONDED, DOUBLE PLUG CONSTRUCTION MAXIMUM RATINGS Operating Temperature: -65°C to +175°C Storage Temperature: -65°C to +175°C DC Power Dissipation: 500mW @ +50°C Power Derating: 4 mW / °C above +50°C REVERSE LEAKAGE CURRENT lR = 15 µA @ 25°C & VR = 8 Vdc ELECTRICAL CHARACTERISTICS @ 25°C, 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 (Note 2) 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. FIGURE 1 MAXIMUM (Note 1) DIM D F G G1 S DESIGN DATA VOLTS mA OHMS mV °C % / °C CDLL941 CDLL941A CDLL941B 11.12 - 12.28 11.12 - 12.28 11.12 - 12.28 7.5 7.5 7.5 30 30 30 88 181 239 0 to + 75 -55 to +100 -55 to +150 0.01 0.01 0.01 CDLL942 CDLL942A CDLL942B 11.12 - 12.28 11.12 - 12.28 11.12 - 12.28 7.5 7.5 7.5 30 30 30 44 90 120 0 to + 75 -55 to +100 -55 to +150 0.005 0.005 0.005 LEAD FINISH: Tin / Lead CDLL943 CDLL943A CDLL943B 11.12 - 12.28 11.12 - 12.28 11.12 - 12.28 7.5 7.5 7.5 30 30 30 18 36 47 0 to + 75 -55 to +100 -55 to +150 0.002 0.002 0.002 POLARITY: Diode to be operated with the banded (cathode) end positive. CDLL944 CDLL944A CDLL944B 11.12 - 12.28 11.12 - 12.28 11.12 - 12.28 7.5 7.5 7.5 30 30 30 9 18 24 0 to + 75 -55 to +100 -55 to +150 0.001 0.001 0.001 MOUNTING POSITION: Any. CDLL945 CDLL945A CDLL945B 11.12 - 12.28 11.12 - 12.28 11.12 -12.28 7.5 7.5 7.5 30 30 30 4 9 12 0 to + 75 -55 to +100 -55 to +150 0.0005 0.0005 0.0005 NOTE 1 Zener impedance is derived by superimposing on lZT A 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. CASE: DO-213AA, Hermetically sealed glass case. (MELF, SOD-80, LL34) 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: [email protected] Pd, Rated Power Dissipation (mW) CDLL941 thru CDLL945B 600 500 400 300 200 100 0 0 25 50 75 100 125 TL, Ambient temperature (°C) 150 FIGURE 2 CHANGE IN TEMPERATURE COEFFICIENT ( %/°C) POWER DERATING CURVE +.0010 +.0005 0 -.0005 -.0010 5.5 6.0 6.5 7.0 7.5 8.0 8.5 OPERATING CURRENT lZT (mA) 9.0 9.5 FIGURE 3 TYPICAL CHANGE OF TEMPERATURE COEFFICIENT WITH CHANGE IN OPERATING CURRENT 100 ZENER IMPEDANCE ZZT (OHMS) 50 20 10 5 2 1 5 6 7 8 9 OPERATING CURRENT lZT (mA) 10 FIGURE 4 ZENER IMPEDANCE VS. OPERATING CURRENT 175