1
Transistor
2SB745, 2SB745A
Silicon PNP epitaxial planer type
For low-frequency and low-noise amplification
Complementary to 2SD661 and 2SD661A
s
Features
q
Low noise voltage NV.
q
High foward current transfer ratio h
FE
.
q
M type package allowing easy automatic and manual insertion as
well as stand-alone fixing to the printed circuit board.
s
Absolute Maximum Ratings
(Ta=25C)
Parameter
Collector to
base voltage
Collector to
emitter voltage
Emitter to base voltage
Peak collector current
Collector current
Collector power dissipation
Junction temperature
Storage temperature
Symbol
V
CBO
V
CEO
V
EBO
I
CP
I
C
P
C
T
j
T
stg
Ratings
35
55
35
55
5
200
50
400
150
55 ~ +150
Unit
V
V
V
mA
mA
mW
C
C
2SB745
2SB745A
2SB745
2SB745A
s
Electrical Characteristics
(Ta=25C)
Parameter
Collector cutoff current
Collector to base
voltage
Collector to emitter
voltage
Emitter to base voltage
Forward current transfer ratio
Collector to emitter saturation voltage
Base to emitter voltage
Transition frequency
Noise voltage
Symbol
I
CBO
I
CEO
V
CBO
V
CEO
V
EBO
h
FE
*
V
CE(sat)
V
BE
f
T
NV
Conditions
V
CB
= 10V, I
E
= 0
V
CE
= 10V, I
B
= 0
I
C
= 10
A, I
E
= 0
I
C
= 2mA, I
B
= 0
I
E
= 10
A, I
C
= 0
V
CB
= 5V, I
E
= 2mA
I
C
= 100mA, I
B
= 10mA
V
CE
= 1V, I
C
= 100mA
V
CB
= 5V, I
E
= 2mA, f = 200MHz
V
CE
= 10V, I
C
= 1mA, G
V
= 80dB
R
g
= 100k
, Function = FLAT
min
35
55
35
55
5
180
typ
0.7
150
max
100
1
700
0.6
1
150
Unit
nA
A
V
V
V
V
V
MHz
mV
Unit: mm
1:Base
2:Collector
EIAJ:SC71
3:Emitter
M Type Mold Package
6.9
0.1
0.55
0.1
0.45
0.05
1.0
0.1
1.0
2.5
0.1
1.0
1.5
1.5 R0.9
R0.9
R0.7
0.4
0.85
3.5
0.1
2.0
0.2
2.4
0.2
1.25
0.05
4.1
0.2
4
.5
0.1
2.5
2.5
1
2
3
2SB745
2SB745A
2SB745
2SB745A
*
h
FE
Rank classification
Rank
R
S
T
h
FE
180 ~ 360
260 ~ 520
360 ~ 700
2
Transistor
2SB745, 2SB745A
0
160
40
120
80
140
20
100
60
0
500
400
300
200
100
450
350
250
150
50
Ambient temperature Ta (C)
Collector power dissipation P
C
(mW
)
0
12
10
8
2
6
4
0
160
120
40
100
140
80
20
60
Ta=25C
I
B
=350
A
300
A
250
A
200
A
150
A
100
A
50
A
Collector to emitter voltage V
CE
(V)
Collector current I
C
(mA
)
0
0.5
0.4
0.1
0.3
0.2
0
160
120
40
100
140
80
20
60
V
CE
=5V
Ta=25C
Base current I
B
(mA)
Collector current I
C
(mA
)
0
1.0
0.8
0.2
0.6
0.4
0
800
600
200
500
700
400
100
300
V
CE
=5V
Ta=25C
Base to emitter voltage V
BE
(V)
Base current I
B
(
A
)
0
2.0
1.6
0.4
1.2
0.8
0
120
100
80
60
40
20
V
CE
=5V
Ta=75C
25C
25C
Base to emitter voltage V
BE
(V)
Collector current I
C
(mA
)
0.1
1
10
100
0.3
3
30
0.01
0.03
0.1
0.3
1
3
10
30
100
I
C
/I
B
=10
Ta=75C
25C
25C
Collector current I
C
(mA)
Collector to emitter saturation voltage V
CE(sat)
(V
)
0.1
1
10
100
0.3
3
30
0
600
500
400
300
200
100
V
CE
=5V
Ta=75C
25C
25C
Collector current I
C
(mA)
Forward current transfer ratio h
FE
0.1
1
10
100
0.3
3
30
0
500
400
300
200
100
450
350
250
150
50
V
CB
=5V
Ta=25C
Emitter current I
E
(mA)
Transition frequency f
T
(MHz
)
0.1
1
10
100
0.3
3
30
0
20
16
12
8
4
18
14
10
6
2
I
E
=0
f=1MHz
Ta=25C
Collector to base voltage V
CB
(V)
Collector output capacitance C
ob
(pF
)
P
C
-- Ta
I
C
-- V
CE
I
C
-- I
B
I
B
-- V
BE
I
C
-- V
BE
V
CE(sat)
-- I
C
h
FE
-- I
C
f
T
-- I
E
C
ob
-- V
CB
3
Transistor
1
3
10
30
100
0
160
120
40
100
140
80
20
60
I
C
=1mA
G
V
=80dB
Function=FLAT
4.7k
R
g
=100k
22k
Collector to emitter voltage V
CE
(V)
Noise voltage NV
(mV
)
1
3
10
30
100
0
300
240
120
180
60
I
C
=1mA
G
V
=80dB
Function=RIAA
4.7k
R
g
=100k
22k
Collector to emitter voltage V
CE
(V)
Noise voltage NV
(mV
)
0.01
0.03
0.1
0.3
1
0
160
120
40
100
140
80
20
60
V
CE
=10V
G
V
=80dB
Function=FLAT
4.7k
R
g
=100k
22k
Collector current I
C
(mA)
Noise voltage NV
(mV
)
0.01
0.03
0.1
0.3
1
0
300
240
120
180
60
V
CE
=10V
G
V
=80dB
Function=RIAA
4.7k
R
g
=100k
22k
Collector current I
C
(mA)
Noise voltage NV
(mV
)
1
3
10
30
100
0
160
120
40
100
140
80
20
60
V
CE
=10V
G
V
=80dB
Function=FLAT
0.1mA
I
C
=1mA
0.5mA
Signal source resistance R
g
(k
)
Noise voltage NV
(mV
)
1
3
10
30
100
0
300
240
120
180
60
V
CE
=10V
G
V
=80dB
Function=RIAA
0.1mA
I
C
=2mA
0.5mA
Signal source resistance R
g
(k
)
Noise voltage NV
(mV
)
2SB745, 2SB745A
NV -- V
CE
NV -- V
CE
NV -- I
C
NV -- I
C
NV -- R
g
NV -- R
g
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