ROHM DTB123YU DTB123YK User Guide and Manual
Summary
Discover the DTB123YU/DTB123YK series of PNP epitaxial planar silicon transistors designed for reliable interface and driver applications, particularly in inverter circuitry. These components feature integrated bias resistors with thin-film construction, simplifying circuit design by eliminating the need for external input resistances while minimizing parasitic effects. This manual provides comprehensive technical specifications, electrical characteristics, and application guidelines needed by electronics designers and engineers building high-performance digital circuits and systems utilizing standard SC-70/SMT packaging.
Page 1 Text Content
500m A / 50V Digital transistors (with built-in resistor) DTB123YU / DTB123YK Applications Dimensions (Unit : mm) Inverter, Interface, Driver
DTB123YU 2.0 0.9
Features 0.3 0.2 0.7
1) Built-in bias resistors enable the configuration of an
inverter circuit without connecting external input resistors (see equivalent circuit). 2) The bias resistors consist of thin-film resistors with (2) (1) complete isolation to allow positive biasing of the input.
0.65 0.65 (1) GND
They also have the advantage of almost completely (2) IN
ROHM : UMT3 1.3
eliminating parasitic effects. (3) OUT
EIAJ : SC-70
Each lead has same dimensions
3) Only the on / off conditions need to be set for operation,
Abbreviated symbol : F52
making the device design easy.
DTB123YK 2.9 1.1
Structure 0.4 0.8
PNP epitaxial planar silicon transistor
(Resistor built-in type)
Packaging specifications (2) (1) 1.
(1) GND 2.
Package UMT3 SMT3 0.15
(2) IN
ROHM : SMT3 1.9
Packaging type Taping Taping (3) OUT
EIAJ : SC-59
Each lead has same dimensions
Code T106 T146
Abbreviated symbol : F52
Basic ordering
0. 1M in
Part No. unit (pieces) 0. 3M in
DTB123YU
DTB123YK
Absolute maximum ratings (Ta=25C) Inner circuit
Limits
Parameter Symbol Unit
DTB123YU DTB123YK
R1 OUT
Supply voltage VCC −50
Input voltage VIN −12 to +5
Output current IC −500 m A
GND(+)
Power dissipation PD m W
Junction temperature Tj °C Storage temperature Tstg −55 to +150 °C IN OUT
GND(+)
www.rohm.com
1/2 2009.06 - Rev.E
○c 2009 ROHM Co., Ltd. All rights reserved.
Page Summary Contents For ROHM DTB123YU DTB123YK User Guide and Manual
Manual Details
| Brand | ROHM |
|---|---|
| Pages | 3 |
| File Size | 137.87 KB |
| Published | June 17, 2026 |
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Frequently Asked Questions
Do I need external resistors to configure a circuit with this transistor?
No, the built-in bias resistors allow configuration of an inverter circuit without connecting external input resistors.
What is the maximum rated supply voltage (VCC) for operation?
The absolute maximum rating for the supply voltage (VCC) is -50 V.
What environmental conditions should I be aware of when designing with this component?
Because it's general-use electronic equipment, users must implement safety measures like derating and fail-safe designs, as ROHM does not bear responsibility for specialized critical systems use.
Which packaging type is used for the DTB123YU model?
The UMT3 package specifies a semi-automatic tape taping (SMT3) format and has EIAJ: SC-59 leads.