MS1491 [MICROSEMI]
Transistor;
Microsemi 
MS1491
RF & MICROWAVE TRANSISTORS
UHF MOBILE APPLICATIONS
Features
•
•
•
•
•
•
470 MHz
12.5 VOLTS
P
OUT = 45 WATTS
GP = 5.2 dB MINIMUM
GOLD METALIZATION
COMMON EMITTER CONFIGURATION
DESCRIPTION:
The MS1491 is a 12.5 volt silicon NPN transistor designed
primarily for UHF communications. The device utilizes an
emitter ballasted die geometry capable of operating into an
infinite load VSWR under specified operating conditions.
ABSOLUTE MAXIMUM RATINGS (Tcase = 25°C)
Symbol
VCBO
Value
36
Unit
V
Collector-Base Voltage
VCEO
VEBO
IC
Collector-Emitter Voltage
Emitter-Base Voltage
Collector Current
16
V
4.0
10
175
V
A
W
°C
°C
PTOT
TSTG
TJ
Total Power Dissipation
Storage Temperature
Junction Temperature
-65 to +200
+200
Thermal Data
RTH(J-C)
Junction-case Thermal Resistance
1.0
°C/W
053-7081 Rev - 10-2002
MS1491
ELECTRICAL SPECIFICATIONS (Tcase = 25°C)
STATIC
Symbol
Test Conditions
Value
Min.
36
Typ.
Max.
---
Unit
V
BVCBO
BVCES
BVCEO
BVEBO
ICES
IC = 5 mA
IC = 20 mA
IC = 50 mA
IE = 5 mA
VCE = 22 V
VCE = 5 V
IE = 0 mA
VBE = 0 V
IB = 0 mA
IC = 0 mA
IE = 0 mA
IC = 1 A
---
36
---
---
V
16
---
---
V
V
mA
---
4.0
---
---
---
---
5
HFE
20
---
200
DYNAMIC
Symbol
Test Conditions
Value
Typ.
---
Min.
Max.
Unit
POUT
GP
f = 470 MHz
f = 470 MHz
f = 470 MHz
f = 1 MHz
PIN = 15W
PIN = 15W
PIN = 15W
VCE = 12.5V
VCE = 12.5V
VCE = 12.5V
VCE = 12.5V
45
---
W
5.2
55
---
---
---
---
---
---
dB
%
ηC
COB
170
pf
IMPEDANCE DATA
FREQ
ZIN(Ω)
ZCL(Ω)
470 MHz
512 MHz
1.5 – j2.8
0.75 – j1.8
1.6 – j2.4
0.8 – j1.1
PIN = 15W
VCE = 12.5V
053-7081 Rev - 10-2002
MS1491
PACKAGE MECHANICAL DATA
053-7081 Rev - 10-2002
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