• 1N6638,1N6642, 1N6643 AVAILABLE IN JAN, PER MIL-PRF-19500/578 1N6638 1N6642 1N6643 JANTX, JANTXV, AND JANS • SWITCHING DIODES • NON-CAVITY GLASS PACKAGE • METALLURGICALLY BONDED 0.056/0.075 1.42/1.91 MAXIMUM RATINGS Operating Temperature: -65°C to +175°C Storage Temperature: -65°C to +175°C Operating Current: 300 mA Derating: 3.0 mA/°C Above TL = + 75°C @L = 3/8” Surge Current: IFSM = 2.5A, half sine wave, Pw = 8.3ms POLARITY BAND (CATHODE) 0.140/0.180 3.55/4.57 1.00 25.4 0.018/0.022 0.46/0.56 ELECTRICAL CHARACTERISTICS @ 25°C, unless otherwise specified. TYPES 1N6638 1N6642 1N6643 V BR @IR =100µA V RWM V F1 I FM = 10 mA (Pulsed) V F2 @ I F2 t fr IF = 50 mA t rr FIGURE 1 (Pulsed) V(PK) (min) V(PK) V dc V dc mA ns ns 150 100 75 125 75 50 0.8 0.8 1.0 1.1 1.2 1.2 200 100 100 20 20 20 4.5 5.0 6.0 DESIGN DATA CASE: Hermetically sealed, “D” Body per MIL-PRF- 19500/578. D-5D I R1 I R2 I R3 I R4 C T1 C T2 VR = 20 V @V R = V RWM V R = 20 V TA = 150°C V R = V RWM TA = 150°C VR= 0V VR= 1.5V nA dc µA dc µA dc µA dc pF pF 1N6638 35 0.5 50 100 2.5 2.0 1N6642 25 0.5 50 100 5.0 2.8 1N6643 50 0.5 75 160 5.0 2.8 TYPES LEAD MATERIAL: Copper clad steel LEAD FINISH: Tin / Lead THERMAL RESISTANCE: (ROJL): 160 °C/W maximum at L = .375 THERMAL IMPEDANCE: (ZOJX): 25 °C/W maximum POLARITY: Cathode end is banded. MOUNTING POSITION: Any 6 LAKE STREET, LAWRENCE, MASSACHUSETTS 01841 PHONE (978) 620-2600 FAX (781) 689-0803 WEBSITE: http://www.microsemi.com 75 IN6638, IN6642 and IN6643 1000 ºC 1 -65ºC 25º C 100 0ºC 10 15 IF - Forward Current - (mA) 100 0.1 .2 .3 .4 .5 .6 .7 .8 .9 VF - Forward Voltage (V) 1.0 1.1 1.2 FIGURE 2 Typical Forward Current vs Forward Voltage 1000 100 IR - Reverse Current - (µA) 150ºC 10 C 100º 1 0.1 25ºC .01 -65ºC .001 20 40 60 80 100 120 140 Percent of Reverse Working Voltage (%) 76 FIGURE 3 Typical Reverse Current vs Reverse Voltage NOTE : All temperatures shown on graphs are junction temperatures