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Transistors
Low frequency amplifier
2SD2671
2SD2671
zApplication
Low frequency amplifier
Driver
zFeatures
1) A collector current is large.
2) VCE(sat) : max. 370mV
At lc=1.5A / lB=75mA
zExternal dimensions (Unit : mm)
TSMT3
(1) Base
(2) Emitter
(3) Collector
2.9
0.4
(3)
(1) (2)
0.95 0.95
1.9
1.0MAX
0.85
0.7
0~0.1
0.16
Each lead has same dimensions
zAbsolute maximum ratings (Ta=25°C)
Parameter
Collector-base voltage
Collector-emitter voltage
Emiter-base voltage
Collector current
Symbol
VCBO
VCEO
VEBO
IC
ICP
Power dissipation
PC
Junction temperature
Tj
Range of storage temperautre Tstg
1 Single pluse, Pw=1ms
2 Mounted on a 25×25× t 0.8mm Ceramic substrate
Limits
30
www.DUantaSitheet4U.com
V
30 V
6V
2A
4 A1
500 mW
12 W
150 °C
55 to +150 °C
zElectrical characteristics (Ta=25°C)
Parameter
Collector-base breakdown voltae
Collector-emitter breakdown voltae
Emitter-base breakdown voltage
Collector cutoff current
Emitter cutoff current
Collector-emitter saturation voltage
DC current gain
Transition frequency
Collector output capacitance
Pulsed
Symbol
BVCBO
BVCEO
BVEBO
ICBO
IEBO
VCE(sat)
hFE
fT
Cob
Min. Typ. Max. Unit
Conditions
30 − − V IC=10µA
30 − − V IC=1mA
6 − − V IE=10µA
− − 100 nA VCB=30V
− − 100 nA VEB=6V
180 370 mV IC=1.5A, IB=75mA
270 680 VCE=2V, IC=200mA
280 MHz VCE=2V, IE=−200mA, f=100MHz
20 pF VCB=10V, IE=0A, f=1MHz
Rev.B
1/2

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Transistors
zPackaging specifications
Package
Type
Code
Basic ordering unit (Pieces)
2SD2671
Taping
TL
3000
zElectrical characteristic curves
1000
Ta=125 C
VCE=2V
Pulsed
Ta=25 C
Ta=25 C
10
IC/IB=20/1
Pulsed
1
100
0.1
Ta=25 C
Ta=25 C
Ta=125 C
2SD2671
10
IC/IB=20/1
Pulsed
Ta=25 C
Ta=25 C
Ta=125 C
1
10
0.001
0.01 0.1
1
COLLECTOR CURRENT : IC (A)
10
0.01
0.001
0.01 0.1
1
COLLECTOR CURRENT : IC (A)
10
Fig.1 DC current gain
vs. collector current
Fig.2 Collector-emitter saturation voltage
base-emitter saturation voltage
vs. collector current
0.1
0.001
0.01
0.1
1
COLLECTOR CURRENT : IC (A)
10
Fig.3 Base-emitter saturation voltage
vs. collector current
10
VCE=2V
Pulsed
1
0.1
0.01
Ta=125 C
Ta=25 C
Ta=25 C
1000
100
Ta=25 C
VCE=2V
f= 100MHz
1000
100
IC=0A
f=1MHz
Ta=25 C
Cob
Cib
0.001
0
0.2 0.4 0.6 0.8 1
1.2 1.4
BASE TO EMITTER CURRENT : VBE (V)
Fig.4 Grounded emitter propagation
characteristics
10
0.01
0.1 1
EMITTER CURRENT : IE (A)
10
Fig.5 Gain bandwidth product
vs. emitter current
10
0.001 0.01 0.1
1
10 100
EMITTER TO BASE VOLTAGE : VEB (V)
COLLECTOR TO BASE VOLTAGE : VCB (V)
Fig.6 Collector output chapacitance
vs. collector-base voltage
Emitter input capacitance
vs. emitter-base voltage
Rev.B
2/2

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Appendix
Notes
No technical content pages of this document may be reproduced in any form or transmitted by any
means without prior permission of ROHM CO.,LTD.
The contents described herein are subject to change without notice. The specifications for the
product described in this document are for reference only. Upon actual use, therefore, please request
that specifications to be separately delivered.
Application circuit diagrams and circuit constants contained herein are shown as examples of standard
use and operation. Please pay careful attention to the peripheral conditions when designing circuits
and deciding upon circuit constants in the set.
Any data, including, but not limited to application circuit diagrams information, described herein
are intended only as illustrations of such devices and not as the specifications for such devices. ROHM
CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any
third party's intellectual property rights or other proprietary rights, and further, assumes no liability of
whatsoever nature in the event of any such infringement, or arising from or connected with or related
to the use of such devices.
Upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or
otherwise dispose of the same, no express or implied right or license to practice or commercially
exploit any intellectual property rights or other proprietary rights owned or controlled by
ROHM CO., LTD. is granted to any such buyer.
Products listed in this document are no antiradiation design.
The products listed in this document are designed to be used with ordinary electronic equipment or devices
(such as audio visual equipment, office-automation equipment, communications devices, electrical
appliances and electronic toys).
Should you intend to use these products with equipment or devices which require an extremely high level of
reliability and the malfunction of with would directly endanger human life (such as medical instruments,
transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers and other
safety devices), please be sure to consult with our sales representative in advance.
About Export Control Order in Japan
Products described herein are the objects of controlled goods in Annex 1 (Item 16) of Export Trade Control
Order in Japan.
In case of export from Japan, please confirm if it applies to "objective" criteria or an "informed" (by MITI clause)
on the basis of "catch all controls for Non-Proliferation of Weapons of Mass Destruction.
Appendix1-Rev1.1