 Semiconductor Components Industries, LLC, 2001
September, 2001 – Rev. 3
1 Publication Order Number:
2N5638/D
2N5638, 2N5639
2N5638 is a Preferred Device
JFET Chopper Transistors
N–Channel – Depletion
N–Channel Junction Field Effect Transistors, depletion mode (Type
A) designed for chopper and high–speed switching applications.
• Low Drain–Source “ON” Resistance:
RDS(on) = 30Ω for 2N5638
RDS(on) = 60Ω for 2N5639
• Low Reverse Transfer Capacitance
C
rss
= 4.0 pF (Max) @ f = 1.0 MHz
• Fast Switching Characteristics
t
r
= 5.0 ns (Max) (2N5638)
MAXIMUM RATINGS
Rating Symbol Value Unit
Drain–Source Voltage V
DS
30 Vdc
Drain–Gate Voltage V
DG
30 Vdc
Reverse Gate–Source Voltage V
GSR
30 Vdc
Forward Gate Current I
GF
10 mAdc
Total Device Dissipation
@ T
A
= 25°C
Derate above 25°C
P
D
310
2.82
mW
mW/°C
Storage Temperature Range T
stg
–65 to +150 °C
Operating Junction Temp Range T
J
–65 to +135 °C
INPUT
(SCOPE A)
OUTPUT
(SCOPE B)
PULSE
GENERATOR
V
DD
= 10 Vdc
0.1 F
0.001 F
50 Ohms
50
R
L
+–
TO
50 OHM
SCOPE A
TO
50 OHM
SCOPE B
R
L

V
DD
I
D
(R
DS(on)
50)
50
50
1.0 k
SCOPE
TEKTRONIX 567A
OR EQUIVALENT
Figure 1. Switching Times Test Circuit
V
GS(on)
V
GS(off)
10%
10%
90%
90%
t
d(off)
t
r
t
d(on)
t
f
Device Package Shipping
ORDERING INFORMATION
2N5638RLRA TO–92
TO–92
CASE 29
STYLE 5
2000/Tape & Reel
3
2
1
Preferred devices are recommended choices for future use
and best overall value.
2N5639 TO–92 5000/Box
2N5369RLRA TO–92 2000/Tape & Reel
Y = Year
WW = Work Week
MARKING DIAGRAMS
2N
5638
YWW
2N
5639
YWW
http://onsemi.com
1 DRAIN
2 SOURCE
3
GATE