AVIONICS APPLICATIONS
RF & MICROWAVE TRANSISTORS
.400 x .400 2LFL (M138)
hermetically sealed
.DESIGNED FOR HIGH POWER PULSE
IFF, DME, AND TACAN APPLICATIONS
.200 W (typ.) IFF 1030 - 1090 MHz
.150W(min.)DME1025-1150MHz
.140 W (typ.) TACAN 960 - 1215 MHz
.7.8 dB MIN. GAIN
.REFRACTORY GOLD METALLIZATION
.BALLASTING AND LOW THERMAL
RESISTANCE FOR RELIABILITY AND
RUGGEDNESS
.30:1 LOAD VSWR CAPABILITY AT
SPECIFIED OPERATING CONDITIONS
.INPUT AND OUTPUT MATCHED,
COMMON BASE CONFIGURATION
DESCRIPTION
The SD1538-08 is a gold metallized, silicon NPN
power transistor. The SD1538-08 is designed for
applications requiring high peak power and low
duty cycles such as IFF, DME and TACAN. The
SD1538-08 is packaged in a metal/ceramic pack-
age with internal input/output matching, resulting
in improved broadband performance and low ther-
mal resistance.
PIN CONNECTION
BRANDING
1538-8
ORDER CODE
SD1538-08
ABSOLUTE MAXIMUM RATINGS (T
case
= 25
°
C)
Symbol Parameter Value Unit
VCBO Collector-Base Voltage 65 V
V
CES
Collector-Emitter Voltage 65 V
V
EBO
Emitter-Base Voltage 3.5 V
IC Device Current 11 A
PDISS Power Dissipation 583 W
T
J
Junction Temperature +200
°
C
T
STG
Storage Temperature − 65 to +150
°
C
RTH(j-c) Junction-Case Thermal Resistance 0.30 °C/W
SD1538-08
1. Collector 3. Emitter
2. Base 4. Base
THERMAL DATA
September 6, 1994
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