140 COMMERCE DRIVE
MONTGOMERYVILLE, PA
18936-1013
PHONE: (215) 631-9840
FAX: (215) 631-9855
BFR91
RF & MICROWAVE DISCRETE
LOW POWER TRANSISTORS
Features
•
•
•
High Current-Gain – Bandwidth Product, fT = 5 GHz (typ) @ IC = 30 mA
Low Noise Figure – NF = 1.9 dB (typ) @ f = 0.5 GHz, 2.5 dB (typ) @ 1GHz
High Power Gain – Gmax = 16 dB (typ) @ f = 0.5 GHz, 10.9dB (typ) @ 1GHz
Macro T
(STYLE #2)
DESCRIPTION:
Designed primarily for use in high-gain, low noise, small-signal amplifiers. Also used in
applications requiring fast switching times.
ABSOLUTE MAXIMUM RATINGS
(Tcase = 25
°
C)
Symbol
V
CEO
V
CBO
V
EBO
I
C
Parameter
Collector-Emitter Voltage
Collector-Base Voltage
Emitter-Base Voltage
Collector Current
Value
12
15
3.0
35
Unit
Vdc
Vdc
Vdc
mA
Thermal Data
P
D
Total Device Dissipation @ TA = 60ºC
Derate above 60ºC
Storage Temperature
-65 to +150
ºC
ºC/W
Total Device Dissipation @ TA = 60ºC
Derate above 60ºC
180
2.0
mWatts
mW/
ºC
Tstg
R
θ
JA
500
MSC1308.PDF 10-25-99
BFR91
ELECTRICAL SPECIFICATIONS (Tcase = 25
°
C)
STATIC
(off)
Symbol
BVCEO
BVCB0
BVEBO
ICBO
Test Conditions
Min.
Collector-Emitter Breakdown Voltage
(IC = 1.0 mAdc, IB = 0)
Collector-Base Breakdown Voltage
(IC = 0.1 mAdc, IE = 0)
Emitter-Base Breakdown Voltage
(IE = 0.1 mAdc, IC = 0)
Collector Cutoff Current
(VCB = 5.0 Vdc, VBE = 0 Vdc)
12
15
3.0
-
Value
Typ.
-
-
-
-
Max.
-
-
-
50
Unit
Vdc
Vdc
Vdc
nA
(on)
HFE
DC Current Gain
(IC = 30 mAdc, VCE = 5.0 Vdc)
25
-
250
-
DYNAMIC
Symbol
Ftau
CCB
Test Conditions
Min.
Current-Gain – Bandwidth Product
(IC = 30 mA, VCE = 5.0 Vdc, f = 0.5 GHz)
Output Capacitance
(VCB = 10 Vdc, IE = 0, f = 1.0 MHz)
-
-
Value
Typ.
5.0
0.7
Max.
-
1.0
Unit
GHz
pF
MSC1308.PDF 10-25-99
BFR91
FUNCTIONAL
Symbol
Test Conditions
Min.
NF
Noise Figure
(IC = 2.0 mAdc, VCE = 5.0 Vdc, f = 0.5 GHz)
(IC = 2.0 mAdc, VCE = 5.0 Vdc, f = 1.0 GHz)
Power Gain at Optimum Noise Figure
(IC = 2.0 mAdc, VCE = 5.0 Vdc, f = 0.5 GHz)
(IC = 2.0 mAdc, VCE = 5.0 Vdc, f = 1.0 GHz)
Insertion Gain
(IC = 30 mAdc, VCE = 5.0 Vdc, f = 0.5 GHz)
(IC = 30 mAdc, VCE = 5.0 Vdc, f = 1.0 GHz)
Maximum Stable Gain
(IC = 30 mAdc, VCE = 5.0 Vdc, f = 0.5 GHz)
(IC = 30 mAdc, VCE = 5.0 Vdc, f = 1.0 GHz)
Maximum Unilateral Gain (1)
(IC = 30 mAdc, VCE = 5.0 Vdc, f = 0.5 GHz)
(IC = 30 mAdc, VCE = 5.0 Vdc, f = 1.0 GHz)
-
Value
Typ.
1.9
2.5
11
8.0
15.5
10.2
Max.
-
Unit
dB
GNF
|S
21
|
2
-
-
dB
14.5
-
dB
MSG
-
18.6
12.9
16.5
10.9
-
dB
G
U max
-
-
dB
Table 1. Common Emitter S-Parameters, @ VCE = 5.0 V, IC = 30 mA
f
S11
(MHz)
100
200
300
500
700
800
1000
1500
|S11|
0.258
0.290
0.298
0.305
0.302
0.304
0.304
0.256
∠φ
-115
-149
-164
-179
170
166
158
134
S21
|S21|
25.77
14.66
10.05
6.18
4.5
3.98
3.24
2.3
∠φ
123
103
94
84
77
73
67
54
S12
|S12|
0.021
0.038
0.054
0.085
0.117
0.133
0.166
0.24
∠φ
76
74
75
75
73
72
70
65
S22
|S22|
0.536
0.384
0.311
0.264
0.256
0.257
0.251
0.263
∠φ
-33
-43
-45
-49
-52
-54
-57
-69
MSC1308.PDF 10-25-99
BFR91
RF Low Power PA, LNA, and General Purpose RF Discrete Selector Guide
GPE Freq (MHz)
Efficiency (%)
IC max (mA)
Gu Max (dB)
Ccb(pF)
BVCEO
IC max (mA)
3.5
20 400
30
400
30 400
1
1
3
1
1
1
2.6
Pout (watts)
Freq (MHz)
NF (dB)
NF IC (mA)
NF VCE
Package
Device
SO-8
TO-39
POWER MACRO
POWER MACRO
TO-39
TO-39
TO-72
MA C R O X
MA C R O X
TO-39
SO-8
P O W ER MA C R O
P O W ER MA C R O
MA C R O X
MA C R O X
SO-8
P O W ER MA C R O
P O W ER MA C R O
MRF4427, R2
2N4427
MRF553
MRF553T
MRF607
2N6255
2N5179
MRF559
MRF559
2N3866A
MRF555
MRF555T
MRF559
MRF559
MRF8372,R1,R2
MRF557
MRF557T
NPN 175
NPN 175
NPN 175
NPN 175
NPN 175
NPN 175
NPN 200
NPN 5 1 2
NPN 5 1 2
NPN 4 0 0
NPN 4 7 0
NPN 4 7 0
NPN 8 7 0
NPN 8 7 0
NPN 8 7 0
NPN 8 7 0
NPN 8 7 0
0.15
1
1.5
1.5
1.75
3
18
10
11.5
11.5
11.5
7.8
20
60
50
60
50
50
50
12
12
12.5
12.5
12.5
12.5
6
20
20
16
16
16
18
12
16
16
30
30
16
16
16
16
16
16
16
400
400
500
500
330
1000
50
150
150
400
400
400
400
150
150
200
400
400
TO-39
TO-39
SO-8
TO-72
TO-72
TO-39
TO-72
TO-72
MACRO T
2N5109
MRF5943C
NPN
NPN
200
200
200
200
300
300
450
450
500
500
500
500
500
500
500
500
500
1000
1000
1000
1000
3
3.4
3.4
4.5
5.5
7.5
1.5
5
1.9
2
2
2
2.4
2.5
2.5
2.5
3
1.3
1.5
2.5
3
10
30
30
1.5
50
50
5
2
2
10
50
50
2
2
5
50
90
5
10
2
2
15
15
15
6
6
15
6
5
5
10
10
10
10
5
10
10
15
6
6
5
10
15
11
14
10
8
10
15.5
14
15
11
GN (dB)
Type
12
1200
11.4 1000
15
17
13
5.5
11
14
16.5
14.5
17.8
15
18
20
15
17.8
14.5
17
MRF5943, R1, R2 NPN
2N5179
2N2857
MRF517
MRF904
2N6304
BFR91
BFR96
MRF5812, R1, R2
MRF581A
BFR90
BFY90
MRF914
MRF581
MRF586
MRF951
MRF571
BFR91
BFR90
1300
900
1600
4600
4000
1400
5000
500
5000
5000
5000
1300
4500
5000
4500
8000
8000
2.2
0.45
1
1
1
1
NPN
NPN
NPN
NPN
NPN
NPN
NPN
NPN
NPN
NPN
NPN
NPN
NPN
NPN
NPN
NPN
NPN
NPN
Ftau (MHz)
GPE (dB)
GPE VCC
Package
Device
BVCEO
Type
12
15
25
15
15
12
15
15
15
15
15
12
16
17
10
10
12
15
50
40
150
30
50
35
100
200
200
30
50
40
200
200
100
70
35
30
0.5
0.5
1
1
1.5
1.5
0.5
0.5
0.75
1.5
1.5
10
13
10
10
11
11
6.5
9.5
8
8
8
65
60
45
45
50
50
70
65
55
55
55
7.5
12.5
28
28
12.5
12.5
7.5
12.5
12.5
12.5
12.5
MACRO T
SO-8
MACRO X
Macro
TO-72
TO-72
MACRO X
TO-39
MACRO X
MACRO X
MACRO T
MACRO T
M R F 3 8 6 6 , R 1 , R 2 NPN 4 0 0
11
12.5
5000
5000
TO-39
TO-39
MRF545
MRF544
PNP
NPN
14
13.5
1400
1500
2
70
70
400
400
RF (Low Power PA / General Purpose) Selection Guide
RF (LNA / General Purpose) Selection Guide
1
1
2
3
2
4
2
5
4
Macro T
Macro X
Power Macro
SO-8
MSC1308.PDF 10-25-99
BFR91
PIN 1. COLLECTOR
2. EMITTER
3. BASE
1.
2.
3.
MSC1308.PDF 10-25-99
模拟与混合信号
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