BF994 查看數據表（PDF） - Vishay Semiconductors
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BF994 Datasheet PDF : 7 Pages
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BF994S
Vishay Telefunken
N–Channel Dual Gate MOS-Fieldeffect Tetrode,
Depletion Mode
Electrostatic sensitive device.
Observe precautions for handling.
Applications
Input- and mixer stages especially VHF TV-tuners.
Features
D Integrated gate protection diodes
D High cross modulation performance
D Low noise figure
D High AGC-range
D Low feedback capacitance
D Low input capacitance
21
G2
D
94 9279
G1
13 579
3
4
BF994 Marking: MG
Plastic case (SOT 143)
12623
S
1=Source, 2=Drain, 3=Gate 2, 4=Gate 1
Absolute Maximum Ratings
Tamb = 25_C, unless otherwise specified
Parameter
Test Conditions
Drain - source voltage
Drain current
Gate 1/Gate 2 - source peak current
Total power dissipation
Channel temperature
Tamb ≤ 60 °C
Storage temperature range
Type
Symbol
Value
Unit
VDS
20
V
ID
30
mA
±IG1/G2SM
10
mA
Ptot
200
mW
TCh
150
°C
Tstg –55 to +150 °C
Maximum Thermal Resistance
Tamb = 25_C, unless otherwise specified
Parameter
Test Conditions
Symbol
Value
Unit
Channel ambient on glass fibre printed board (25 x 20 x 1.5) mm3
RthChA
450
K/W
plated with 35mm Cu
Document Number 85008
Rev. 3, 20-Jan-99
www.vishay.de • FaxBack +1-408-970-5600
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