VISHAY BF979 Technical data
查询BF979供应商
Silicon PNP Planar RF Transistor
Applications
UHF/VHF uncontrolled prestages with low noise and
low modulation.
Features
D
High cross modulation performance
D
High power gain
3
Vishay Telefunken
Electrostatic sensitive device.
Observe precautions for handling.
D
Low noise
D
High reverse attenuation
BF979
2
94 9308
1
13623
BF979 Marking: BF979
Plastic case (TO 50)
1 = Collector, 2 = Base, 3 = Emitter
Absolute Maximum Ratings
T
= 25_C, unless otherwise specified
amb
Parameter Test Conditions Symbol Value Unit
Collector-base voltage –V
Collector-emitter voltage –V
Emitter-base voltage –V
Collector current –I
Total power dissipation T
≤ 60 °C P
amb
Junction temperature T
Storage temperature range T
CBO
CEO
EBO
C
tot
j
stg
20 V
20 V
3 V
50 mA
300 mW
150
–55 to +150
Maximum Thermal Resistance
T
= 25_C, unless otherwise specified
amb
Parameter T est Conditions Symbol Value Unit
Junction ambient on glass fibre printed board (40 x 25 x 1.5) mm
plated with 35mm Cu
3
R
thJA
300 K/W
°
C
°
C
Document Number 85006
Rev. 3, 20-Jan-99
www.vishay.de • FaxBack +1-408-970-5600
1 (5)
BF979
Vishay Telefunken
Electrical DC Characteristics
T
= 25_C, unless otherwise specified
amb
Parameter Test Conditions Symbol Min Typ Max Unit
Collector cut-off current –VCE = 20 V, VBE = 0 –I
Collector-base cut-off current –VCB = 15 V, IE = 0 –I
Emitter-base cut-off current –VEB = 3 V, IC = 0 –I
Collector-emitter breakdown voltage –IC = 1 mA, IB = 0 –V
DC forward current transfer ratio –VCE = 10 V, –IC = 10 mA h
Electrical AC Characteristics
T
= 25_C, unless otherwise specified
amb
CES
CBO
EBO
(BR)CEO
FE
100mA
100 nA
10
m
20 V
20 50 90
A
Parameter Test Conditions Sym-
Transition frequency –VCE = 10 V, –IC = 10 mA, f = 300 MHz f
Transition frequency –VCE = 10 V, –IC = 30 mA, f = 300 MHz f
Collector-base capacitance –VCB = 10 V, f = 1 MHz C
Noise figure –VCE = 10 V, –IC = 10 mA, ZS = 50 W,
f = 800 MHz
Power gain –VCE = 10 V, –IC = 10 mA, ZS = 50 W, Z
L
= 500 W, f = 800 MHz
Collector current for G
pbmax
–VCE = 10 V, ZL = 500 W, f = 800 MHz –I
Min Typ Max Unit
bol
T
T
cb
1750 MHz
1300 MHz
0.6 pF
F 3.4 4.2 dB
G
pb
C
16 dB
10 mA
www.vishay.de • FaxBack +1-408-970-5600
2 (5)
Document Number 85006
Rev. 3, 20-Jan-99
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