Datasheet 2SC4081UB Datasheet (ROHM)

General purpose small signal amplifier

(50V, 0.15A)

2SC4081UB

zApplications zDimensions (Unit : mm)
General purpose small signal amplifier

zFeatures

1) Low Cob.
Cob=2.0pF (Typ.)

2) Complements the 2SA4081.

zStructure

NPN silicon epitaxial planar transistor

zAbsolute maximum (Ta=25°C)

Parameter
Collector-base voltage
Collector-emitter voltage
Emitter-base voltage

Collector current

Power dissipation
Junction temperature
Range of storage temperature

∗1 Pw=1ms Single pulse
∗2 Each terminal mounted on a recommended land

zElectrical characteristics (Ta=25°C)

Parameter
Collector-emitter breakdown voltage
Collector-base breakdown voltage
Emitter-base breakdown voltage
Collector cutoff current
Emitter cutoff current
Collector-emitter saturation voltage
DC current gain
Transition frequency
Output capacitance

Symbol

BV
BV
BV

I

CBO

I

EBO

V

CE(sat)

h

Cob

h

rank categories

FE

Rank

h

FE

PQ

82 to 180 120 to 270

Symbol Limits Unit

60 V
50

7
150I
200
200
150

−55 to +150

−

−

−

−

−

−

100

−

100

−

400

−

560

−

−

3.5

f

CEO

CBO

EBO

FE

T

CBO

V
V

CEO

V

EBO

I

CP

P

Tj

Tstg

Min.

C

∗1
∗2

D

Typ. Max. Unit Conditions
50
60

7

−

−

−

82

180

−

2.0

−

R

180 to 390S270 to 560

UMT3F

(1) Base
(2) Emitter
(3) Collector

∗ = Denotes h

V
VI

V
nA
nA

mV

−

MHz

pF

0.32

0.4250.425

2.1

1.25

FE

Abbreviated symbol : B

V

V
mA
mA

mW

°C
°C

I

C

=1mA

C

=50µA

I

E

=50µA

V

CB

=60V

EB

=7V

V
I

C/IB

=50mA/5mA

V

CE

=6V, IC=1mA

CE

=12V, IE=−2mA, f=100MHz

V
V

CB

=12V, IE=0A, f=1MHz

2.0

(3)

(1) (2)

0.65 0.65

1.3

0.9

0.530.53

0.13

Each lead has same dimensions

∗

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1/2

c

○

2009 ROHM Co., Ltd. All rights reserved.

2009.03 - Rev.B

n

(mA)

.0

)

0.50mA

0

)

0

500

DC CURRENT GAIN : h

0

500

DC CURRENT GAIN : h

F

)

0.5

0

F

)

0.5

0

F

V)

0

0

.

20

0

s)

zElectrical characterristic curves

50

20

C

10

5

2
1

0.5

COLLECTOR CURRENT : I

0.2

0.1
0

BASE TO EMITTER VOLTAGE : V

25°C

100°C

−55°C

=

Ta

0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6

Fig.1 Grounded emitter propagatio

characteristics

Ta=25°C

FE

200

100

50

VCE=5V

V

CE

=6V

BE

(V)

3V
1V

Data Sheet 2SC4081UB

100

Ta=25°C

80

(mA)

C

60

40

20

COLLECTOR CURRENT : I

0

0.4 0.8 1.2 1.6 2

0

COLLECTOR TO EMITTER VOLTAGE : V

0.45mA

0.40mA

0.35mA

0.30mA

0.25mA

0.20mA

0.15mA

0.10mA

0.05mA

IB=0A

CE

(V

Fig.2 Grounded emitter output

characteristics ( Ι )

FE

200

100

50

Ta=100°C

25°C

−55°C

VCE=

5V

10

Ta=25°C

(mA)

8

C

6

4

2

COLLECTOR CURRENT : I

0

4 8 12 16

0

COLLECTOR TO EMITTER VOLTAGE : V

30µA
27µA
24µA
21µA

18µA
15µA

12µA

9µA
6µA

3µA

IB=0A

Fig.3 Grounded emitter output

characteristics ( ΙΙ )

(V

CE(sat)

0.2
IC/IB=50

0.1

0.05

20
10

CE

Ta=25°C

2

(V

20

10

0.2

0.5 1 2 5 10 20 50 100 20

COLLECTOR CURRENT : I

Fig.4 DC current gain vs.

collector current ( Ι )

(V

CE(sat)

0.2

Ta=100°C

0.1

0.05

0.02

0.01

COLLECTOR SATURATION VOLTAGE : V

0.2

ig.7 Collector-emitter saturation

pF)

pF)

10

25°C

−55°C

0.5 1 2 5 10 20 50 100 20
COLLECTOR CURRENT : I

voltage vs. collector current ( Ι )

Cib

C

(mA)

C

IC/IB=10

(mA)

Ta=25°C

f=1MHz

I

E

=0A

I

C

=0A

20

10

0.2 0.5 1 2 5 10 20 50 100 20

COLLECTOR CURRENT : I

C

(mA)

Fig.5 DC current gain vs.

collector current ( ΙΙ )

0.5

(

CE(sat)

0.2

0.1

0.05

0.02

0.01

COLLECTOR SATURATION VOLTAGE : V

Ta=100°C

25°C

−55°C

0.5 1 2 5 10 20 50 10

0.2
COLLECTOR CURRENT : I

C

(mA)

ig.8 Collector-emitter saturation

voltage vs. collector current (ΙΙ)

bb' (p

200

100

IC/IB=50

Ta=25°C
f=32MH
VCB=6V

0.02

0.01

COLLECTOR SATURATION VOLTAGE : V

0.2

0.5 1 2 5 10 20 50 100 20
COLLECTOR CURRENT : I

C

(mA)

ig. 6 Collector-emitter saturation

voltage vs. collector current

Ta=25°C

V

CE

E

=6V

(mA)

500

(MHz)

T

200

100

TRANSITION FREQUENCY : f

50

−0.5 −1 −2 −5 −10 −20 −50 −10
EMITTER CURRENT : I

Fig.9 Gain bandwidth product vs.

Z

emitter current

COLLECTOR OUTPUT CAPACITANCE : Cob (

Fig.10 Collector output capacitance vs

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2/2

c

○

5

2

EMITTER INPUT CAPACITANCE : Cib (

1

0.2 0.5 1 2 5 10 20 50

COLLECTOR TO BASE VOLTAGE : V
EMITTER TO BASE VOLTAGE : V

Cob

CB

(V)

EB

(V)

collector-base voltage
Emitter input capacitance vs.
emitter-base voltage

2009 ROHM Co., Ltd. All rights reserved.

50

20

10

−0.2 −0.5 −1 −2 −5 −1

BASE COLLECTOR TIME CONSTANT : Cc·r

EMITTER CURRENT : I

E

(mA)

Fig.11 Base-collector time constant

vs. emitter current

2009.03 - Rev.B

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