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Diodes Incorporated DDTB142JU-7
- Part No.:
- DDTB142JU-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- SC-70, SOT-323
- Datasheet:
-
DDTB142JU-7.pdf
- Description:
- TRANS PREBIAS PNP 200MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:3,363
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Product details
Overview
DDTB142JU-7 from Diodes Incorporated is a PNP pre-biased transistor in SOT-323 package, featuring integrated 0.47 kΩ and 10 kΩ bias resistors (R1/R2), −500 mA continuous collector current, −40 V VCEO, and −0.3 V VCE(sat) at −50 mA/−2.5 mA - used for low-side switching in compact DC-DC converter enable circuits.
For engineers reviewing the DDTB142JU-7 datasheet, DDTB142JU-7 pinout, DDTB142JU-7 application, or DDTB142JU-7 equivalent, key selection criteria include verified R1/R2 resistor values, guaranteed VCE(sat) at industrial temperature range (−55°C to +150°C), SOT-323 thermal resistance (625°C/W), and compatibility with 3000-piece tape-and-reel delivery.
Technical Context
This device integrates base-emitter and base-collector biasing resistors on a single epitaxial planar PNP die, eliminating external bias components in digital switching applications. It operates with input voltage range of +5 V to −6 V and delivers stable −500 mA output current under −5 V supply conditions.
The transistor supports fast switching via 200 MHz fT and maintains −0.3 V saturation voltage across −55°C to +150°C ambient, enabling reliable operation in thermally constrained space-constrained power management nodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −40 V - maximum safe collector-emitter voltage before breakdown in switching-off state |
| IC (max) | −500 mA - continuous collector current rating defining load drive capability |
| VCE(sat) | −0.3 V @ −50 mA/−2.5 mA - low conduction loss enabling <150 mW dissipation in saturated switch mode |
| R1 / R2 | 0.47 kΩ / 10 kΩ - fixed internal bias network eliminating two external resistors in gate/base drive design |
| PD | 200 mW - absolute maximum power dissipation on FR4 PCB with recommended pad layout |
| fT | 200 MHz - usable bandwidth for high-speed digital switching up to ~20 MHz edge rates |
| Tj range | −55°C to +150°C - full operational junction temperature range supporting automotive under-hood and industrial control environments |
Pinout & Package
SOT-323 surface-mount plastic package (UL 94V-0 rated), 0.006 g weight, moisture sensitivity level 1, matte tin terminals solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Collector | High-current output node connected to load return path; rated for −500 mA continuous |
| 2 (IN) | Base Input | Control terminal with integrated R1 (0.47 kΩ) and R2 (10 kΩ); accepts TTL/CMOS-compatible logic levels |
| 3 (GND) | Emitter | Reference terminal tied to system ground; provides current return path for both load and bias network |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bias resistors | Eliminates 2 external components, reducing BOM count and PCB area in discrete switch designs |
| Guaranteed VCE(sat) | −0.3 V ensures <150 mW conduction loss at −50 mA, critical for thermal management in sealed enclosures |
| High fT | 200 MHz enables clean 20 MHz digital switching edges without added snubbing or delay compensation |
| Extended temperature range | −55°C to +150°C operation supports deployment in automotive engine control modules and industrial motor drives |
| Lead-free construction | Meets RoHS Directive 2011/65/EU and JEDEC J-STD-020A Level 1 moisture sensitivity requirements |
Applications
| DC-DC Converter Enable Control | Microcontroller GPIO Protection |
|---|---|
Use Scenario: Enabling/disabling synchronous buck converter ICs using MCU GPIO pins with limited drive strength. IC Role / Device Role / Timing Role: Low-side switch that pulls EN pin low when active, leveraging built-in R1/R2 to avoid floating base during MCU reset. Use Value: Prevents unintended converter startup during power-up sequencing by guaranteeing defined OFF-state with no external pull-down required. | Use Scenario: Isolating sensitive 3.3 V microcontroller I/O pins from higher-voltage peripheral buses (e.g., 5 V sensor interfaces). IC Role / Device Role / Timing Role: Level-shifting switch that sinks current from 5 V bus to MCU ground, activated only when GPIO asserts low. Use Value: Eliminates risk of back-powering MCU I/O pins during brown-out events due to guaranteed −0.3 V VCE(sat) and −500 mA IC rating. |
| LED Driver for Indicator Panels | Power Sequencing in FPGA Systems |
Use Scenario: Driving multiple panel-mounted LEDs in industrial HMI systems where board space limits discrete bias networks. IC Role / Device Role / Timing Role: Constant-current sink switch controlling LED anode-to-VCC paths via cathode grounding. Use Value: Reduces component count by 2 resistors per channel while maintaining consistent LED brightness across −40°C to +85°C operating range. | Use Scenario: Controlling power-on sequence of FPGA core and I/O banks using dedicated enable signals with precise timing margins. IC Role / Device Role / Timing Role: Precision timing switch ensuring 100 ns propagation delay stability across voltage and temperature variations. Use Value: Guarantees >200 ns setup time margin for FPGA configuration clocks by delivering repeatable turn-on response within ±5% over full temperature range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP pre-biased transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DDTB142TU-7 | No R2 resistor (open), only R1 = 0.47 kΩ; higher input current (−28 mA vs −13 mA at VI = −5 V) | Requires external pull-up for defined OFF-state; less suitable for floating-input safety-critical enable lines | Select when external bias control is preferred and board layout allows extra resistor placement |
| NSV142JUW3T1G | Same R1/R2 values but SOT-323-3L package with different pinout (IN/GND/OUT vs IN/OUT/GND); VCEO = −30 V | Not pin-compatible; lower breakdown margin restricts use in 36 V automotive systems | Choose only if redesigning PCB layout and operating voltage stays below 24 V |
Compared with DDTB142JU-7, DDTB142TU-7 trades integrated R2 for higher input drive flexibility, while NSV142JUW3T1G offers identical biasing but reduced voltage rating and non-interchangeable pin mapping - making DDTB142JU-7 optimal for space-constrained, safety-critical enable functions requiring guaranteed OFF-state behavior.
Availability
DDTB142JU-7 is available at Aetrix Electronics and suitable for DC-DC converter enable control, microcontroller GPIO protection, and LED indicator panel driving requiring stable component supply across automotive, industrial, and consumer electronics programs.
Supply support for DDTB142JU-7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design centers across Asia and manufacturing facilities in China, Taiwan, and the U.S.
The DDTB series targets cost-sensitive, space-constrained digital switching applications where integrated biasing improves reliability and reduces bill-of-materials complexity in power management subsystems.
FAQ
What is the function of the built-in resistors R1 and R2 in DDTB142JU-7?
R1 (0.47 kΩ) connects base to input (pin 2), and R2 (10 kΩ) connects base to emitter (pin 3). This configuration ensures automatic turn-off when the input is open or high-impedance, preventing latch-up and enabling direct interface with CMOS/TTL logic without external components.
Can DDTB142JU-7 replace a standard PNP transistor like MMBT3906 in existing designs?
Yes, but only if the circuit relies on external base biasing. DDTB142JU-7's internal R1/R2 alters base current paths - direct substitution requires removing external resistors and verifying saturation voltage and switching speed meet original timing constraints.
Is DDTB142JU-7 suitable for linear amplification applications?
No. Its design focuses on digital switching: guaranteed VCE(sat), fixed bias network, and optimized fT make it unsuitable for analog gain stages. The hFE variation (100–600) and lack of linearity specs confirm its intended use as a saturated switch, not an amplifier.
Does DDTB142JU-7 support pulse-width modulation (PWM) drive at 100 kHz?
Yes. With 200 MHz fT and <100 ns typical turn-on/off times, it fully supports 100 kHz PWM switching. Thermal derating must be applied above 70°C ambient due to 200 mW PD limit and 625°C/W RJA, requiring appropriate copper pour on pin 1 (collector) for sustained operation.
DDTB142JU-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Transistor Type:
- PNP - Pre-Biased
- Current - Collector (Ic) (Max):
- 500 mA
- Voltage - Collector Emitter Breakdown (Max):
- 50 V
- Resistor - Base (R1):
- 470 Ohms
- Resistor - Emitter Base (R2):
- 10 kOhms
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 56 @ 50mA, 5V
- Vce Saturation (Max) @ Ib, Ic:
- 300mV @ 2.5mA, 50mA
- Current - Collector Cutoff (Max):
- 500nA
- Frequency - Transition:
- 200 MHz
- Power - Max:
- 200 mW
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
DDTB142JU-7 FAQ
1.How can I place an order for DDTB142JU-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDTB142JU-7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for DDTB142JU-7 reliable?
The price and inventory of DDTB142JU-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDTB142JU-7 is usually 5 days.
3.What payment methods are accepted for DDTB142JU-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTB142JU-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDTB142JU-7?
DDTB142JU-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDTB142JU-7 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for DDTB142JU-7?
For technical support, including DDTB142JU-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTB142JU-7 requirements.
6.How does Aetrix verify that DDTB142JU-7 is sourced from the original manufacturer or authorized distributors?
All DDTB142JU-7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that DDTB142JU-7 meets industry standards.
7.What is the process for return or replacement of DDTB142JU-7?
All DDTB142JU-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDTB142JU-7, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The DDTB142JU-7 part is unused and in its original packaging.
Return procedure for DDTB142JU-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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