I R1

I R2

I R3

I R4

C T1

C T2

TYPES

V R@V R

V R = 20 V

V R = V RWM

V R =V R =

= 20 V

= V RWM

TA = 150°C

TA = 150°C

0V

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

75

6 LAKE STREET, LAWRENCE, MASSACHUSETTS 01841

PHONE (978) 620-2600

FAX (781) 689-0803

WEBSITE: http://www.microsemi.com

V BR

V RWM

V F1

V F2 @I F2

t fr

t rr

TYPES

@ I R

I FM

I F

=100µA

= 10 mA

= 50 mA

(Pulsed)

(Pulsed)

V(PK)

V(PK)

V dc

V dc

mA

ns

ns

(min)

1N6638

150

125

0.8

1.1

200

20

4.5

1N6642

100

75

0.8

1.2

100

20

5.0

1N6643

75

50

1.0

1.2

100

20

6.0

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: I

w = 8.3ms

ELECTRICAL CHARACTERISTICS @ 25°C, unless otherwise specified.

• 1N6638,1N6642, 1N6643 AVAILABLE IN

PER MIL-PRF-19500/578

• SWITCHING DIODES

• NON-CAVITY GLASS PACKAGE

• METALLURGICALLY BONDED

1N6638

1N6642

1N6643

DESIGN DATA

CASE: Hermetically sealed, “D” Body

per MIL-PRF- 19500/578. D-5D

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

FIGURE 1

0.056/0.075

1.42/1.91

0.140/0.180

3.55/4.57

1.00

25.4

0.018/0.022

0.46/0.56

POLARITY

BAND

(CATHODE)