DTC643TU / DTC643TK
Transistors
Digital transistors (built-in resistor)
DTC643TU / DTC643TK
!
Features
In addition to the features of regular digital transistors.
1) Low saturation voltage, typically
V
CE (sat)
=40mV at I
C
/ I
B
=50mA / 2.5mA, makes these
transistors ideal for muting circuits.
2) These transistors can be used at high current levels,
I
C
=600mA.
!
External dimensions
(Unit : mm)
UMT3
<SC-70>
2.0±0.2
1.3±0.1
0.9
±0.1
0.2
0.7
±0.1
SOT-323
0.65 0.65
(1)
(2)
1.25
±0.1
2.1
±0.1
0−0.1
(3)
0.3
+0.1
−0
0.15
±0.05
!
Structure
NPN digital transistor
(Built-in resistor type)
(1) Emitter
(2) Base
(3) Collector
Each lead has same dimensions
Abbreviated symbol :
R03
SMT3
<SC-59>
2.9±0.2
1.9±0.2
0.95 0.95
(1)
(2)
1.1
+0.2
−0.1
0.8±0.1
!
Equivalent circuit
SOT-346
(3)
1.6
+0.2
−0.1
2.8±0.2
C
B
R
R=4.7kΩ
E
(1) Emitter
(2) Base
(3) Collector
0.4
+0.1
−0.05
0.15
+0.1
−0.06
Each lead has same dimensions
Abbreviated symbol :
R03
B : Base
C : Collector
E : Emitter
!
Absolute maximum ratings
(Ta=25°C)
Parameter
Collector-base voltage
Collector-emitter voltage
Emitter-base voltage
Collector current
Collector power dissipation
Junction temperature
Storage temperature
Symbol
V
CBO
V
CEO
V
EBO
I
C
P
C
Tj
Tstg
Limits
20
20
12
600
200
150
−55
to
+150
Unit
V
V
V
mA
mW
°C
°C
0.3Min.
0.1Min.
1/2
DTC643TU / DTC643TK
Transistors
!
Electrical characteristics
(Ta=25°C)
Parameter
Symbol Min. Typ. Max. Unit
Conditions
Collector-base breakdown voltage
20
−
−
V I
C
=50µA
BV
CBO
20
−
−
V I
C
=1mA
Collector-emitter breakdown voltage BV
CEO
12
−
−
V I
E
=50µA
BV
EBO
Emitter-base breakdown voltage
−
−
0.5
µA
V
CB
=20V
I
CBO
Collector cutoff current
I
EBO
−
−
0.5
µA
V
EB
=12V
Emitter cutoff current
−
40
150 mV I
C
/ I
B
=50mA
/ 2.5mA
Collector-emitter saturation voltage V
CE (sat)
h
FE
820
−
2700
−
V
CE
=5V,
I
C
=50mA
DC current transfer ratio
R
1
−
3.29 4.7 6.11 kΩ
Input resistance
−
150
−
MHz V
CE
=10V,
I
E
= −50mA,
f=100MHz
f
T
Transition frequency
R
on
−
0.55
−
Ω
VI=5V, R
L
=1kΩ,
f=1MHz
Output "ON" resistance
∗Transition
frequency of the device.
∗
!
Packaging specifications and h
FE
Package
Type
Packaging type
Code
Basic ordering unit (pieces)
DTC643TU
DTC643TK
−
UMT3
Taping
T106
3000
SMT3
Taping
T146
3000
−
!
Electrical characteristic curves
10000
V
CE
=5V
10000
I
C
/ I
B
=20
/ 1
1000
COLLECTOR SATURATION
VOLTAGE : V
CE (sat)
(mV)
1000
ON RESISTANCE : R
on
(Ω)
DC CURRENT GAIN : h
FE
100
Ta=25°C
f=1kHz
R
L
=1kΩ
h
FE
=1500
(5V / 50mA)
100°C
1000
25°C
−40°C
100
100°C
10
25°C
10
−40°C
1
100
0.1
1
10
100
1000
1
0.1
1
10
100
1000
0.1
0.1
1
10
100
COLLECTOR CURRENT : I
C
(mA)
COLLECTOR CURRENT : I
C
(mA)
INPUT VOLTAGE : VI (V)
Fig.1 DC Current Gain vs.
Collector Current
Fig.2 Collector-Emitter Saturation
Voltage vs. Collector Current
Fig.3 "ON" resistance vs. Input Voltage
!
R
on
measurement circuit
R
L
=1kΩ
R
on
=
v
0
×R
L
v
i
−v
0
Input
v
i
100mV
(rms)
f=1kHz
Output
V
v
0
v
I
Fig.4 Output "ON" resistance (R
on
)
measurement circuit
2/2
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
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