M SCXXXX.PDF 01-19-99
MS2554
DESCRIPTION:
The MS255 4 is a NPN bipolar transistor specifically designed for
high peak pulse power applications such as DME/T ACAN.
T his device is capable of withstanding a minimum 20 : 1 load
VSWR at any phase angle under full rated conditions. Internal
impeda nce matching provides consistent broadba nd
performance.
ABSOLUTE MAXIMUM RATINGS(Tcase = 25°C)
Symbol
Parameter
Value
Unit
P
DISS
Power Dissipation
600
W
IC Device Current 17.8 A
VCC Collector-Supply Voltage* 55 V
TJ Junction Temperature 200 °C
TSTG Storage Temperature -65 to +200 °C
Thermal Data
RTH(J-C) Thermal Resistance Junction-case 0.20 °C/W
Features
•1025 – 1150 M Hz
•50 VOLTS
•INPUT/OUTPUT MATCHING
•POUT = 250 WATTS
•GP= 6.2 dB MINIMUM
•COMMON BASE CONFIGURATION
RF & MICROWAVE TRANSIS TORS
AVIONICS APPLICATIONS
140 COMMERCE DRIVE
MONTGOMERYV ILLE , PA
18936-1013
PHONE: (215) 631-9840
FAX: (215) 631-9855
M SCXXXX.PDF 01-19-99
MS2554
ELECTRICAL SPECIFICATIONS (Tcase = 25°C)
STATIC
Symbol
Test Conditions
Value
Min. Typ. Max. Unit
BVCBO I
C = 15 mA IE = 0 mA 65 --- --- V
BVEBO I
E= 1 mA IC = 0 mA 3.5 --- --- V
BVCER IC= 50 mA RBE = 10 Ω65 --- --- V
ICES V
CE = 50 V --- --- 25 mA
HFE VCE = 5 V IC= 1 A 15 --- 120 ---
DYNAMIC
Symbol
Test Conditions
Value
Min. Typ. Max. Unit
POUT f = 1025 - 1150 MHz PIN = 90 W VCC = 50 V 250 --- --- W
ηCf = 1025 - 1150 MHz PIN = 90 W VCC = 50 V 40 --- --- %
GPf = 1025 - 1150 MHz PIN = 90 W VCC = 50 V 6.2 --- --- dB
Condition
s
Pulse Width = 10uS Duty Cycle = 1%
IMPEDANCE DATA
FREQ ZIN (Ω) ZCL (Ω)
1025 MHz 4.2 + j6.7 2.0 - j7.5
1090 MHz 4.0 + j3.5 2.5 - j7.5
1150 MHz 2.3 + j2.3 2.5 - j8.5
VCC = 50V
PIN = 60W
M SCXXXX.PDF 01-19-99
MS2554
PACKAGE MECHANICAL DATA
