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BF245A 반도체 회로 부품 판매점

JFET VHF/UHF AMPLIFIER



Motorola Semiconductors 로고
Motorola Semiconductors
BF245A 데이터시트, 핀배열, 회로
BF244,A,B,C
CASE 29-02, STYLE 22
TO-92 (TO-226AA)
MAXIMUM RATINGS
Rating
Drain-Source Voltage
Drain-Gate Voltage
Gate-Source Voltage
Drain Current
Forward Gate Current
@Total Device Dissipation Ta = 25°C
Derate above 25°C
Storage Channel Temperature Range
Symbol
VDS
vdg
vgs
id
'G(f)
PD
Tstq
Value
±30
30
30
100
10
360
2.88
-65 to +150
Unit
Vdc
Vdc
Vdc
mAdc
mAdc
mW
mW/°C
°C
ELECTRICAL CHARACTERISTICS <TA = 25°C unless otherwise noted )
Characteristic
Symbol
OFF CHARACTERISTICS
Gate-Source Breakdown Voltage
OG =1.0uAdc, Vds = 0)
V(BR)GSS
Gate-Source
(Vds = 15 Vdc, Id = 200 LiA)
BF245(1), BF244(2)
BF245A, BF244A
BF245B, BF244B
BF245C, BF244C
vgs
Gate-Source Cutoff Voltage
(Vds = 15 Vdc, Id = 10 nA)
VGS(off)
Gate Reverse Current
(Vqs = 20 vdc, v D s = o)
ON CHARACTERISTICS
IGSS
*
Zero-Gate Voltage Drain Current
(v D s = 15 vdc, vgs = o>
SMALL-SIGNAL CHARACTERISTICS
BF245(1), BF244(2)
BF245A, BF244A
BF245B, BF244B
BF245C, BF244C
IDSS
Forward Transfer Admittance
(Vds = 15 vdc, Vqs = o, f = 1 khz)
iYfsl
Output Admittance
(Vds = 15 vdc, vqs = o, f = 1 khz)
Yos
Forward Transfer Admittance
(Vds = 15 vdc, vqs = o, f = 200 mh Z )
Reverse Transfer Admittance
(Vds = 15 vdc, vgs = 0, f = 200 mhz)
IYfsl
iY rS
Input Capacitance
(Vds = 20 vdc, -vgs = 1 vdc)
Ciss
Reverse Transfer Capacitance
(Vds = 20 Vdc, -Vqs = 1 Vdc, f = 1 MHz)
Output Capacitance
(Vds = 20 vdc, -vqs = 1 vdc, f = 1 mhz)
Crss
C ss
Noise Figure
(Vds = 15 vdc, vgs = 0, rq = 1 kq, f = 100 mhz)
NF
Cut-off Frequency(3)
(Vds = 15 vdc, vG s = 0)
(1)On orders against the BF245, any or all subgroups might be shipped.
(2) On orders against the BF244, any or all subgroups might be shipped.
(3) The frequency at which gfs is 0.7 of its value at 1 KHz.
F (Yfs)
BF245,A,B,C
CASE 29-02, STYLE 23
TO-92 (TO-226AA)
JFET
VHF/UHF AMPLIFIER
N-CHANNEL- DEPLETION
Refer to 2N4416 for graphs.
Min
Typ
Max
Unit
_V
30
0.4 7.5
0.4 2.2
1.6 3.8
3.2 7.5
V
_0.5
8
V
,5
nA,,
mA
2 25
2 6.5
6 15
12 25
mmhos
3.0 6.5
Limhos
40
mmhos
5.6
mmhos
1.0
pF
3
pF
0.7
pF
0.9
db
1.5
MHz
700
6-97




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( motorola )

BF245A amplifier

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