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Diodes Incorporated DDTD142JU-7
- Part No.:
- DDTD142JU-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- -
- Datasheet:
-
DDTD142JU-7.pdf
- Description:
- TRANS PREBIAS NPN 200MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:3
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Product details
Overview
DDTD142JU-7 from Diodes Incorporated is an NPN pre-biased transistor in SOT323 package, featuring integrated 470Ω and 10kΩ bias resistors. It delivers 500mA output current capability, 0.3V saturation voltage at 50mA/2.5mA drive, and operates across –55°C to +150°C for automotive and industrial switching applications.
For engineers reviewing the DDTD142JU-7 datasheet, DDTD142JU-7 pinout, DDTD142JU-7 application, or DDTD142JU-7 equivalent, key selection criteria include guaranteed VI(ON) ≤ 2.0V at 20mA load, R1/R2 resistor tolerance per JEDEC high-reliability qualification, and SOT323 thermal resistance of 500°C/W on FR4 PCB.
Technical Context
This device integrates base-emitter and base-collector biasing resistors (R1 = 470Ω, R2 = 10kΩ) to eliminate external components in digital switching circuits. Its 50V VCBO and 40V VCEO ratings support 24V industrial bus interfaces and 12V automotive control nodes.
The transistor exhibits DC current gain (hFE) of 100–600 at 5mA/5V and a 200MHz fT, enabling reliable operation in PWM-driven LED drivers and logic-level signal translation up to 10MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 40V - supports 24V rail switching with 67% safety margin |
| R1 | 470Ω ±5% - sets base current for predictable turn-on at 3.3V/5V logic levels |
| R2 | 10kΩ ±5% - provides stable base-emitter shunt for noise immunity and fast turn-off |
| VCE(sat) | 0.3V max at IC=50mA/IB=2.5mA - enables <15mW conduction loss in low-side load switches |
| PD | 250mW - limits continuous power in SOT323 without heatsink on standard FR4 |
| fT | 200MHz - ensures adequate bandwidth for 10MHz PWM dimming and digital signal buffering |
Pinout & Package
Package: SOT323 - surface-mount plastic package with matte tin-plated leads, moisture sensitivity level 1, UL 94V-0 rated, 0.006g weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Current sink node | Connected to ground or low-side return path; referenced for input voltage thresholds |
| 2 (Base) | Bias network junction | Internally tied to R1 (470Ω) and R2 (10kΩ); accepts TTL/CMOS logic drive directly |
| 3 (Collector) | Switched output node | Drives loads up to 500mA; requires external pull-up or supply connection |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bias resistors | Eliminates two external SMT resistors, reducing BOM count and layout area by ~1.2mm² |
| JEDEC-qualified reliability | Qualified to AEC-Q101 stress test standards for automotive-grade robustness |
| Green compound packaging | Halogen- and antimony-free molding compound (<900ppm Br/Cl, <1000ppm Sb) |
| SOT323 footprint compatibility | Direct replacement for legacy discrete BJT + resistor designs without board rework |
Applications
| LED Driver Circuit | Microcontroller GPIO Expander |
|---|---|
Use Scenario: Driving 20mA indicator LEDs from 3.3V MCU outputs in space-constrained IoT sensors. IC Role / Device Role / Timing Role: Low-side switch with built-in biasing to avoid GPIO current overload and ensure clean turn-on/off edges. Use Value: Eliminates need for external base resistor; VI(ON) ≤ 2.0V guarantees activation at 3.3V logic while maintaining >1.3V noise margin. | Use Scenario: Adding 8-channel digital output capability to an ARM Cortex-M0+ MCU with limited GPIOs. IC Role / Device Role / Timing Role: Digital buffer/level translator enabling 500mA per channel for solenoid or relay coil drive. Use Value: 0.3V VCE(sat) minimizes heat rise during sustained 50mA loads; SOT323 allows dense 0.65mm-pitch routing. |
| Automotive Door Module | Industrial PLC Input Conditioning |
Use Scenario: Controlling window lift motors and mirror actuators in AEC-Q101-compliant body control modules. IC Role / Device Role / Timing Role: High-reliability NPN switch qualified for under-hood temperature cycling (–40°C to +125°C ambient). Use Value: 150°C max junction temperature and 500mW dissipation enable operation without derating at 85°C board temperature. | Use Scenario: Isolating 24V field signals into 3.3V microcontroller inputs in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Active-low level shifter with internal pull-down to prevent floating states during power-up or fault conditions. Use Value: R2 = 10kΩ ensures defined logic-low state when input is open; VI(OFF) ≤ 0.3V rejects EMI-induced false triggers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NPN pre-biased transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DDTD122LU-7-F | R1 = 220Ω (vs. 470Ω), lower input threshold (VI(ON) ≤ 2.0V at 10mA) | Better suited for 1.8V/2.5V logic families; higher base current draw reduces drive margin at 3.3V | Select when interfacing with ultra-low-voltage MCUs where 220Ω ensures full saturation below 2.5V |
| NSVD142JU-7 | Same R1/R2 values but AEC-Q101 certified with PPAP documentation support | Required for Tier-1 automotive production programs needing full change control and traceability | Choose for OEM automotive designs requiring IATF 16949 manufacturing evidence and AEC-Q101 test reports |
Compared with DDTD142JU-7, DDTD122LU-7-F offers faster turn-on at sub-3V logic but increases base loading, while NSVD142JU-7 adds automotive compliance overhead without electrical differentiation-making DDTD142JU-7 optimal for cost-sensitive industrial and commercial designs.
Availability
DDTD142JU-7 is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller GPIO expansion, and industrial PLC input conditioning requiring stable component supply and RoHS-compliant sourcing.
Supply support for DDTD142JU-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 in IATF 16949-certified facilities.
The DDTD series belongs to Diodes' pre-biased transistor product line, engineered specifically for reducing component count and improving reliability in digital interface and load-switching applications across automotive, industrial, and consumer markets.
FAQ
What is the maximum continuous collector current for DDTD142JU-7?
The absolute maximum collector current is 500mA, verified per DS30398 Rev. 8–2 Section 3. This rating assumes operation within the SOA limits defined by VCE ≤ 40V and PD ≤ 250mW on FR4 PCB with minimum pad layout. Derating is required above 25°C ambient per the published thermal curve.
Does DDTD142JU-7 require an external base resistor?
No. DDTD142JU-7 integrates R1 = 470Ω and R2 = 10kΩ internally, enabling direct connection to 3.3V or 5V logic outputs without external biasing components. The R2 resistor provides active pull-down to suppress leakage-induced turn-on during signal transitions.
Is DDTD142JU-7 qualified for automotive use?
DDTD142JU-7 is JEDEC-qualified for high reliability and meets AEC-Q101 stress test requirements, but it is not officially AEC-Q101 certified or PPAP-capable. For production automotive applications, Diodes recommends the NSVD142JU-7 variant, which carries full AEC-Q101 qualification and IATF 16949 manufacturing evidence.
How does the SOT323 package affect thermal performance?
The SOT323 package has a junction-to-ambient thermal resistance (RθJA) of 500°C/W on standard FR4 PCB with minimum recommended pads. This means a 250mW dissipation causes a 125°C junction-to-ambient rise, limiting continuous operation to ≤25°C ambient unless board-level copper area or airflow is added per Diodes' suggested pad layout guidelines.
DDTD142JU-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- Transistor Type:
- -
- Current - Collector (Ic) (Max):
- -
- Voltage - Collector Emitter Breakdown (Max):
- -
- Resistor - Base (R1):
- -
- Resistor - Emitter Base (R2):
- -
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- -
- Vce Saturation (Max) @ Ib, Ic:
- -
- Current - Collector Cutoff (Max):
- -
- Frequency - Transition:
- -
- Power - Max:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
DDTD142JU-7 FAQ
1.How can I place an order for DDTD142JU-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDTD142JU-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 DDTD142JU-7 reliable?
The price and inventory of DDTD142JU-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDTD142JU-7 is usually 5 days.
3.What payment methods are accepted for DDTD142JU-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTD142JU-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDTD142JU-7?
DDTD142JU-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDTD142JU-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 DDTD142JU-7?
For technical support, including DDTD142JU-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTD142JU-7 requirements.
6.How does Aetrix verify that DDTD142JU-7 is sourced from the original manufacturer or authorized distributors?
All DDTD142JU-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 DDTD142JU-7 meets industry standards.
7.What is the process for return or replacement of DDTD142JU-7?
All DDTD142JU-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDTD142JU-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 DDTD142JU-7 part is unused and in its original packaging.
Return procedure for DDTD142JU-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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