2SC1775, 2SC1775A
Silicon NPN Epitaxial
Application
Low frequency low noise amplifier
Complementary pair with 2SA872/A
Outline
1. Emitter
2. Collector
3. Base
TO-92 (1)
3
2
1
2SC1775, 2SC1775A
2
Absolute Maximum Ratings (Ta = 25C)
Item
Symbol
2SC1775
2SC1775A
Unit
Collector to base voltage
V
CBO
90
120
V
Collector to emitter voltage
V
CEO
90
120
V
Emitter to base voltage
V
EBO
5
5
V
Collector current
I
C
50
50
mA
Collector power dissipation
P
C
300
300
mW
Junction temperature
Tj
150
150
C
Storage temperature
Tstg
55 to +150
50 to +150
C
Electrical Characteristics (Ta = 25C)
2SC1775
2SC1775A
Item
Symbol
Min
Typ
Max
Min
Typ
Max
Unit
Test conditions
Collector to emitter
breakdown voltage
V
(BR)CEO
90
--
--
120
--
--
V
I
C
= 1 mA, R
BE
=
Collector cutoff current
I
CBO
--
--
0.5
--
--
--
A
V
CB
= 75 V, I
E
= 0
--
--
--
--
--
0.5
A
V
CB
= 100 V, I
E
= 0
DC current transfer ratio h
FE1
*
1
400
--
1200 400
--
1200
V
CE
= 12 V, I
C
= 2 mA
h
FE2
160
--
--
160
--
--
V
CE
= 12 V,
I
C
= 0.1 mA
Base to emitter voltage
V
BE
--
--
0.75
--
--
0.75
V
V
CE
= 12 V, I
C
= 2 mA
Collector to emitter
saturation voltage
V
CE(sat)
--
--
0.5
--
--
0.5
V
I
C
= 10 mA, I
B
= 1 mA
Gain bandwidth product f
T
--
200
--
--
200
--
MHz
V
CE
= 12 V, I
C
= 2 mA
Collector output
capacitance
Cob
--
1.6
--
--
1.6
--
pF
V
CB
= 25 V, I
E
= 0,
f = 1 MHz
Noise figure
NF
--
--
5.0
--
--
5.0
dB
V
CE
= 6 V,
I
C
= 50
A,
R
g
= 50 k
f = 10
Hz
--
--
1.5
--
--
1.5
dB
f = 1
kHz
Note:
1. The 2SC1775/A is grouped by h
FE1
as follows.
E
F
400 to 800
600 to 1200
2SC1775, 2SC1775A
3
0
100
200
300
50
Ambient Temperature Ta (
C)
Collector Power Dissipation P
C
(mW)
Maximum Collector Dissipation Curve
100
150
0
2
8
6
4
10
20
10
Collector to Emitter Voltage V
CE
(V)
Collector Current I
C
(mA)
Typical Output Characteristics
30
40
50
10
8
6
2
A
I
B
= 0
P
C
= 300 mW
4
0.03
0.01
3
1.0
0.30
0.10
10
0.4
0.3
0.2
Base to Emitter Voltage V
BE
(V)
Collector Current I
C
(mA)
Typical Transfer Characteristics
0.5
0.6
0.7
0.8
V
CE
= 12 V
Ta = 100
C
75
50
25
0
25
0
400
200
1,000
800
600
1,200
0.1
0.03
0.01
Collector Current I
C
(mA)
DC Current Transfer Ratio h
FE
DC Current Transfer Ratio vs.
Collector Current
0.3
1.0
3
10
30
V
CE
= 12 V
Ta = 100
C
75
50
25
0
25
2SC1775, 2SC1775A
4
10
30
1,000
300
100
0.1
0.03
0.01
Collector Current I
C
(mA)
Gain Bandwidth Product f
T
(MHz)
Gain Bandwidth Product vs.
Collector Current
0.3
1.0
3
10
30
V
CE
= 12 V
2
1.0
0.5
10
5
50
20
5
1
2
Collector to Base Voltage V
CB
(V)
Collector Output Capacitance C
ob
(pF)
Collector Output Capacitance vs.
Collector to Base Voltage
10
20
50
100
I
E
= 0
f = 1 MHz
0.01
0.1
10
3
1.0
0.3
100
30
0.1
0.03
Collector Current I
C
(mA)
Signal Source Resistance R
g
(k
)
Contours of Constant Noise Figure
0.3
1.0
3
10
V
CE
= 6 V
f = 10 Hz
NF = 1 dB
2
4
6
8
10
2SC1775, 2SC1775A
5
0.01
0.1
10
3
1.0
0.3
100
30
0.1
0.03
Collector Current I
C
(mA)
Signal Source Resistance R
g
(k
)
Contours of Constant Noise Figure
0.3
1.0
3
10
V
CE
= 6 V
f = 120 Hz
NF = 1 dB
2
4
6
8
10
0.01
0.1
10
3
1.0
0.3
100
30
0.1
0.03
Collector Current I
C
(mA)
Signal Source Resistance R
g
(k
)
Contours of Constant Noise Figure
0.3
1.0
3
10
V
CE
= 6 V
f = 1 kHz
NF = 1 dB
2
4
6
8
10
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