V BR V RWM V F1 V F2 @ I F2 tfr trr
TYPES @ IRIFM IFIR= 10 mA
=100 µA =10 mA IF= 10 mA
(Pulsed) (Pulsed) =50 mA IREC = 1 mA
V (pk) V (pk) V dc V dc mA ns ns
1N6638U & US 150 125 0.8 1.1 200 20 4.5
1N6642U & US 100 75 1.0 1.2 100 20 5.0
1N6643U & US 75 50 1.0 1.2 100 20 6.0
I R1 I R2 I R3 I R4 C T1 C T2
TYPES V R@
V RV 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
1N6638U & US 35 0.5 50 100 2.5 2.0
1N6642U & US 25 0.5 50 100 5.0 2.8
1N6643U & US 50 0.5 75 160 5.0 2.8
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
MAXIMUM RATINGS
Operating Temperature: -65°C to +175°C
Storage Temperature: -65°C to +175°C
Operating Current: 300 mA
Derating: 4.6 mA/°C Above TEC = + 110°C
Surge Current: I
FSM
= 2.5A, half sine wave, Pw= 8.3ms
ELECTRICAL CHARACTERISTICS @ 25°C, unless otherwise specified.
• 1N6638US,1N6642US, 1N6643US AVAILABLE IN JAN, JANTX, JANTXV AND JANS
PER MIL-PRF-19500/578
• 1N6638U,1N6642U, 1N6643U AVAILABLE IN JAN, JANTX, JANTXV AND JANS
PER MIL-PRF-19500/578
• SWITCHING DIODES
• NON-CAVITY GLASS PACKAGE
• METALLURGICALLY BONDED
1N6638U & US
1N6642U & US
1N6643U & US
DESIGN DATA
CASE: D-5D, Hermetically sealed glass
case, per MIL-PRF- 19500/578
LEAD FINISH: Tin / Lead
THERMAL RESISTANCE: (ROJEC):
50 °C/W maximum at L = 0
THERMAL IMPEDANCE: (ZOJX): 25
°C/W maximum
POLARITY: Cathode end is banded.
MOUNTING SURFACE SELECTION:
The Axial Coefficient of Expansion
(COE) of this device is approximately
+ 4PPM / °C.The COE of the Mounting
Surface System should be selected to
provide a suitable match with this
device.
MILLIMETERS INCHES
DIM MIN MAX MIN MAX
D1.78 2.16 0.070 0.085
F0.48 0.71 0.019 0.028
G4.19 4.95 0.165 0.195
S0.08MIN. 0.003MIN.
FIGURE 1
IN6638U&US, IN6642U&US and IN6643U&US
.2 .3 .4 .5 .6 .7 .8 .9 1.0 1.1 1.2
VF - Forward Voltage (V)
FIGURE 2
Typical Forward Current
vs Forward Voltage
IF- Forward Current - (mA)
1000
100
10
1
0.1
150ºC
100ºC
25ºC
-65ºC
20 40 60 80 100 120 140
Percent of Reverse Working Voltage (%)
FIGURE 3
Typical Reverse Current
vs Reverse Voltage
IR- Reverse Current - (µA)
1000
100
10
1
0.1
.01
.001
150ºC
100ºC
25ºC
-65ºC
NOTE : All temperatures shown on graphs are
junction temperatures
