2SC4994
Silicon NPN Epitaxial
ADE-208-012
1st. Edition
Application
VHF / UHF wide band amplifier
Features
High gain bandwidth product
f
T
= 10.5 GHz Typ
High gain, low noise figure
PG = 17.0 dB Typ, NF = 1.2 dB Typ at f = 900 MHz
Outline
1. Collector
2. Emitter
3. Base
4. Emitter
CMPAK4
1
4
3
2
2SC4994
2
Absolute Maximum Ratings (Ta = 25C)
Item
Symbol
Ratings
Unit
Collector to base voltage
V
CBO
15
V
Collector to emitter voltage
V
CEO
8
V
Emitter to base voltage
V
EBO
1.5
V
Collector current
I
C
20
mA
Collector power dissipation
P
C
100
mW
Junction temperature
Tj
150
C
Storage temperature
Tstg
55 to +150
C
Electrical Characteristics (Ta = 25C)
Item
Symbol
Min
Typ
Max
Unit
Test conditions
Collector cutoff current
I
CBO
--
--
10
A
V
CB
= 15 V, I
E
= 0
I
CEO
--
--
1
mA
V
CE
= 8 V, R
BE
=
Emitter cutoff current
I
EBO
--
--
10
A
V
EB
= 1.5 V, I
C
= 0
DC current transfer ratio
h
FE
50
120
250
V
CE
= 5 V, I
C
= 10 mA
Collector output capacitance
Cob
--
0.4
0.75
pF
V
CB
= 5 V, I
E
= 0, f = 1 MHz
Gain bandwidth product
f
T
7.5
10.5
--
GHz
V
CE
= 5 V, I
C
= 10 mA
Power gain
PG
14.0
17.0
--
dB
V
CE
= 5 V, I
C
= 10 mA,
f = 900 MHz
Noise figure
NF
--
1.2
2.5
dB
V
CE
= 5 V, I
C
= 5 mA,
f = 900 MHz
Note:
Marking is "YS".
Attention: This device is very sensitive to electro static discharge.
It is recommended to adopt appropriate cautions when handling this transistor.
2SC4994
3
0
50
100
150
Ambient Temperature Ta (
C)
Collector Power Dissipation P
C
(mW)
Maximum Collector Dissipation Curve
120
100
80
60
40
20
200
160
120
80
40
0
0.1
Collector Current I (mA)
C
DC Current Transfer Ratio h
FE
0.2
0.5 1
2
5
10 20
50
V = 5V
CE
V = 1V
CE
DC Current Transfer Ratio vs.
Collector Current
12
1
2
5
10
20
50
Collector Current I (mA)
C
Gain Bandwidth Product f (GHz)
T
10
8
6
4
2
0
V = 5 V
CE
V = 1 V
CE
Gain Bandwidth Product vs.
Collector Current
0.52
0.48
0.44
0.40
0.36
0.32
1
2
5
10
20
Collector Output Capacitance Cob (pF)
Collector to Base Voltage V (V)
CB
0.5
I = 0
E
f = 1 MHz
Collector Output Capacitance vs.
Collector to Base Voltage
2SC4994
4
20
16
12
8
4
0
0.3
Power Gain PG (dB)
Collector Current I (mA)
C
1
3
10
30
f = 900 MHz
V = 1V
CE
V = 5V
CE
Power Gain vs. Collector Current
5
4
3
2
1
0
Noise Figure NF (dB)
Collector Current I (mA)
C
0.3
1
3
10
30
f = 900 MHz
V = 5V
CE
V = 1V
CE
Noise Figure vs. Collector Current
2SC4994
5
10
5
4
3
2
1.5
1
.8
2
3
4
5
10
.6
.4
.2
0
.2
.4
.6
.8
1
1.5
.2
.4
.6 .8 1.0
2
3 4 5
Condition: V = 5 V , Zo = 50
200 to 2000 MHz (200 MHz step)
CE
(I = 5 mA)
(I = 10 mA)
C
C
1.5
10
S11 Parameter vs. Frequency
Scale: 4 / div.
0
30
60
90
120
150
180
150
90
60
30
120
Condition: V = 5 V , Zo = 50
200 to 2000 MHz (200 MHz step)
CE
(I = 5 mA)
(I = 10 mA)
C
C
S21 Parameter vs. Frequency
Scale: 0.04 / div.
0
30
60
90
120
150
180
150
90
60
30
120
Condition: V = 5 V , Zo = 50
200 to 2000 MHz (200 MHz step)
CE
(I = 5 mA)
(I = 10 mA)
C
C
S12 Parameter vs. Frequency
10
5
4
3
2
1.5
1
.8
2
3
4
5
10
.6
.4
.2
0
.2
.4
.6
.8
1
1.5
.2
.4
.6 .8 1.0
2
3 4 5
Condition: V = 5 V , Zo = 50
200 to 2000 MHz (200 MHz step)
CE
(I = 5 mA)
(I = 10 mA)
C
C
1.5
10
S22 Parameter vs. Frequency
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