SD1457
RF & MICROWAVE TRANSISTORS
FM BROADCAST APPLICATIONS
.
.
.
.
.
.
108 MHz
28 VOLTS
EFFICIENCY 75%
COMMON EMITTER
GOLD METALLIZATION
P
OUT
=
75 W MIN. WITH 10.0 dB GAIN
.500 4LFL (M174)
epoxy sealed
ORDER CODE
SD1457
BRANDING
SD1457
PIN CONNECTION
DESCRIPTION
The SD1457 is a 28 V gold metallized epitaxial
silicon NPN planar transistor designed for FM VHF
broadcast transmitters.
This device utlizes diffused emitter resistors to
achieve infinite VSWR at rated operating condi-
tions.
ABSOLUTE MAXIMUM RATINGS
(T
case
=
25
擄
C)
Symbol
Parameter
Value
Unit
1. Collector
2. Emitter
3. Base
4. Emitter
V
CBO
V
CEO
V
CES
V
EBO
I
C
P
DISS
T
J
T
STG
Collector-Base Voltage
Collector-Emitter Voltage
Collector-Emitter Voltage
Emitter-Base Voltage
Device Current
Power Dissipation
Junction Temperature
Storage Temperature
65
30
60
4.0
10
100
+200
鈭?/div>
65 to +150
V
V
V
V
A
W
擄
C
擄
C
擄C/W
1/5
THERMAL DATA
R
TH(j-c)
November 1992
Junction-Case Thermal Resistance
1.5
next