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Diodes Incorporated DDTC144EE-7
- Part No.:
- DDTC144EE-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- SOT-523
- Datasheet:
-
DDTC144EE-7.pdf
- Description:
- TRANS PREBIAS NPN 50V SOT523
- Quantity:
- Payment:
- Shipping:
Inventory:6,970
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Product details
Overview
DDTC144EE-7 from Diodes Incorporated is an NPN pre-biased transistor in SOT523 package with integrated bias resistors R1 = R2 = 47 kΩ, designed for digital switching and level translation in low-power logic interfaces. It delivers VO(on) ≤ 0.3 V at IO = 2 mA, supports VI(on) ≥ 3 V (guaranteed turn-on), and operates across –55°C to +150°C for automotive and industrial control applications.
For engineers reviewing the DDTC144EE-7 datasheet, DDTC144EE-7 pinout, DDTC144EE-7 application, or DDTC144EE-7 equivalent, this page provides verified electrical parameters, thermal derating behavior, input/output voltage thresholds, DC current gain (GI = 68 typ), and real-world use cases in I/O buffering, microcontroller GPIO interfacing, and LED driver enable circuits.
Technical Context
This device integrates a single NPN transistor with matched 47 kΩ base bias resistors (R1 = R2) in a three-terminal configuration, eliminating external bias components. Its internal resistor ratio tolerance is ±1%, ensuring consistent switching thresholds across temperature and process variation.
The transistor exhibits fT = 250 MHz (VCE = –10 V, IE = 5 mA), enabling reliable operation in high-speed digital switching up to ~10 MHz edge rates. Output leakage is limited to IO(off) ≤ 0.5 µA at VCC = 50 V, supporting robust off-state isolation in battery-powered systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| R1, R2 (Nom) | 47 kΩ - Enables direct TTL/CMOS-level input drive without external bias network |
| VI(on) | 1.9–3.0 V - Guarantees reliable turn-on with standard 3.3 V logic outputs |
| VO(on) | ≤ 0.3 V @ IO = 2 mA - Ensures low saturation voltage for efficient load switching |
| GI (DC Current Gain) | 68 typ @ VO = 5 V, IO = 5 mA - Supports stable current amplification in buffered output stages |
| PD | 150 mW - Limits continuous power handling on FR-4 PCBs with minimum pad layout |
| fT | 250 MHz - Validates suitability for fast digital edge transitions in interface circuits |
| VCC Max | 50 V - Allows use in 24 V industrial bus and 36 V automotive subsystems |
Pinout & Package
SOT523 surface-mount package: ultra-compact 1.6 mm × 1.6 mm footprint, 0.33 mm nominal height, matte tin-plated leads, moisture sensitivity level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Input reference / GND node | Connected internally to bias resistor network ground; serves as common return for logic input and output paths |
| 2 (Collector) | Switched output terminal | Drives external loads (e.g., LED anode, MOSFET gate, optocoupler input); open-collector compatible |
| 3 (Base) | Control input node | Accepts logic-level voltage; internal R1/R2 network sets fixed base current for predictable saturation |
Key Features
| Feature | Design Value |
|---|---|
| Integrated R1 = R2 bias network | 47 kΩ ±30% - Reduces BOM count and PCB area vs. discrete transistor + two resistors |
| Guaranteed VI(on) threshold | ≥3.0 V - Ensures compatibility with 3.3 V CMOS outputs without marginal turn-on risk |
| Low VO(on) at light load | ≤0.3 V @ 2 mA - Minimizes voltage drop in low-current enable/disable functions |
| AEC-Q101 qualified option available | Manufactured in IATF 16949 certified facilities - Supports automotive-grade reliability requirements |
| Halogen- and antimony-free "Green" construction | <900 ppm Br, <900 ppm Cl, <1000 ppm Sb - Meets global environmental compliance mandates |
Applications
| Microcontroller GPIO Interface | LED Driver Enable Stage |
|---|---|
|
Use Scenario: Driving 2 mA indicator LED from a 3.3 V MCU I/O pin with current limiting via external resistor. IC Role / Device Role: Level-shifting switch that isolates MCU pin from LED forward voltage and ensures clean off-state. Use Value: Eliminates need for separate base resistor; VO(on) ≤ 0.3 V preserves >3 V headroom for LED series resistor selection. |
Use Scenario: Enabling/disabling a constant-current LED driver IC using a logic signal. IC Role / Device Role: Low-leakage enable switch with guaranteed off-state (IO(off) ≤ 0.5 µA) and fast turn-off. Use Value: Prevents standby current drain in battery-powered lighting systems while maintaining <1 µs switching delay. |
| Industrial Sensor Signal Conditioning | Automotive Body Control Module Input |
|
Use Scenario: Buffering open-collector sensor outputs (e.g., Hall effect, reed switch) into 3.3 V logic inputs. IC Role / Device Role: Digital translator converting 5–24 V sensor signals to safe MCU-compatible levels. Use Value: With VCC = 24 V and VI(on) ≤ 3 V, enables direct connection to unregulated sensor rails without voltage dividers. |
Use Scenario: Interfacing 12 V vehicle bus signals (e.g., door lock request) to 3.3 V body controller MCU. IC Role / Device Role: AEC-Q101-capable input protection and level translation stage. Use Value: Rated for –55°C to +150°C operation and manufactured in IATF 16949 facilities, meeting automotive qualification requirements. |
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 |
|---|---|---|---|
| DDTC124EE-7-F | R1 = R2 = 22 kΩ - higher base current, lower VI(on) threshold (1.9–3.0 V) | Better suited for 1.8 V logic inputs; higher IO capability (30 mA max) but reduced voltage margin | Select when driving heavier loads or interfacing with sub-3 V logic families |
| NSVD144EHT1G | 47 kΩ bias, SOT-23 package, higher PD (200 mW), wider temp range (–65°C to +150°C) | Larger footprint; better thermal performance but incompatible pinout and higher cost | Choose for legacy SOT-23 board reuse or where >150 mW dissipation is required |
Compared with DDTC124EE-7-F and NSVD144EHT1G, DDTC144EE-7 offers optimal balance of compact SOT523 size, precise 47 kΩ bias for 3.3 V logic compatibility, and automotive-ready manufacturing-making it ideal for space-constrained, low-power digital interface designs requiring guaranteed VI(on) and minimal BOM overhead.
Availability
DDTC144EE-7 is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body electronics, and portable device I/O buffering requiring stable component supply and long-term lifecycle support.
Supply support for DDTC144EE-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, specializing in high-reliability components for automotive, industrial, and consumer markets.
This part belongs to the DDTC (R1 = R2 Series) pre-biased transistor family, engineered to simplify digital interface design by integrating matched bias resistors and delivering consistent switching behavior across temperature and voltage ranges.
FAQ
What is the maximum collector-emitter voltage rating for DDTC144EE-7?
The absolute maximum VCE rating is 50 V, as specified in the Absolute Maximum Ratings table. This allows safe operation in 24 V industrial control systems and 36 V automotive subsystems, provided power dissipation remains within the 150 mW limit under ambient conditions.
Does DDTC144EE-7 require external bias resistors?
No. The device integrates two 47 kΩ bias resistors (R1 = R2) internally, forming a complete NPN transistor with built-in base bias network. This eliminates the need for external resistors in standard digital switching applications, reducing PCB area and BOM count.
Is DDTC144EE-7 qualified for automotive applications?
Yes-while the standard DDTC144EE-7-F is not automatically AEC-Q101 qualified, Diodes Incorporated manufactures it in IATF 16949 certified facilities and offers AEC-Q101 qualified versions upon request. Automotive change control, PPAP documentation, and extended temperature validation are available through Diodes' automotive support team.
How does the input voltage threshold vary with temperature?
VI(on) remains stable across –55°C to +150°C, with typical values of 1.9–3.0 V at 25°C and no significant shift reported in the datasheet's characteristic curves. The guaranteed turn-on threshold of ≥3.0 V holds across the full operating temperature range, ensuring robust logic compatibility.
DDTC144EE-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Transistor Type:
- NPN - Pre-Biased
- Current - Collector (Ic) (Max):
- 100 mA
- Voltage - Collector Emitter Breakdown (Max):
- 50 V
- Resistor - Base (R1):
- 47 kOhms
- Resistor - Emitter Base (R2):
- 47 kOhms
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 68 @ 5mA, 5V
- Vce Saturation (Max) @ Ib, Ic:
- 300mV @ 500µA, 10mA
- Current - Collector Cutoff (Max):
- 500nA
- Frequency - Transition:
- 250 MHz
- Power - Max:
- 150 mW
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-523
DDTC144EE-7 FAQ
1.How can I place an order for DDTC144EE-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDTC144EE-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 DDTC144EE-7 reliable?
The price and inventory of DDTC144EE-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDTC144EE-7 is usually 5 days.
3.What payment methods are accepted for DDTC144EE-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTC144EE-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDTC144EE-7?
DDTC144EE-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDTC144EE-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 DDTC144EE-7?
For technical support, including DDTC144EE-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTC144EE-7 requirements.
6.How does Aetrix verify that DDTC144EE-7 is sourced from the original manufacturer or authorized distributors?
All DDTC144EE-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 DDTC144EE-7 meets industry standards.
7.What is the process for return or replacement of DDTC144EE-7?
All DDTC144EE-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDTC144EE-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 DDTC144EE-7 part is unused and in its original packaging.
Return procedure for DDTC144EE-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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