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Diodes Incorporated DDTC144GUA-7
- Part No.:
- DDTC144GUA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- -
- Datasheet:
-
DDTC144GUA-7.pdf
- Description:
- TRANS PREBIAS NPN 200MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:3,687
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Product details
Overview
DDTC144GUA-7 from Diodes Incorporated is an NPN pre-biased small-signal transistor with built-in 47 kΩ bias resistor (R2 only), rated for 50 V VCEO, 100 mA IC, and 200 mW PD, used in digital switching and level-shifting circuits in portable consumer electronics and industrial control interfaces.
For engineers reviewing the DDTC144GUA-7 datasheet, DDTC144GUA-7 pinout, DDTC144GUA-7 application, or DDTC144GUA-7 equivalent, key selection criteria include verified R2 = 47 kΩ tolerance (±30%), hFE = 68 at 5 mA/5 V, VCE(sat) ≤ 0.3 V at 10 mA/0.5 mA drive, and SOT-323 package thermal resistance of 625 °C/W on FR4.
Technical Context
This device implements a single-NPN transistor with monolithic integration of a dedicated base-emitter bleeder resistor (R2), eliminating external bias components. It operates as a saturated switch under DC conditions with guaranteed VCE(sat) ≤ 0.3 V and supports switching up to 250 MHz fT at VCE = 10 V, IE = −5 mA.
The SOT-323 package enables high-density PCB layouts while maintaining thermal performance per J-STD-020C Level 1 moisture sensitivity. Its "Green" molding compound complies with halogen-free requirements and UL 94V-0 flammability rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 50 V - Maximum collector-emitter voltage before breakdown; defines safe operating range in 3.3 V/5 V logic interface applications. |
| IC (max) | 100 mA - Continuous collector current limit; supports driving LEDs, relays, or small MOSFET gates without derating below 70°C ambient. |
| R2 | 47 kΩ ±30% - Integrated base-emitter resistor enabling single-resistor digital input drive; eliminates need for external bias network. |
| hFE | 68 (min) at IC = 5 mA, VCE = 5 V - Confirmed DC current gain ensures reliable saturation with low base drive current in microcontroller GPIO interfacing. |
| VCE(sat) | ≤ 0.3 V at IC = 10 mA, IB = 0.5 mA - Low saturation voltage minimizes power loss and heat generation in always-on switching nodes. |
| fT | 250 MHz - Gain-bandwidth product confirms suitability for high-speed digital signal conditioning up to ~10–20 MHz edge rates. |
Pinout & Package
Package: SOT-323 - ultra-small surface-mount plastic case (2.0–2.2 mm × 1.15–1.35 mm × 0.25–0.40 mm height), lead-free matte tin plating, UL 94V-0 rated, moisture sensitivity Level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Emitter (E) | Current sink terminal | Connected to ground or low-side return path; internal R2 ties base to emitter for self-biasing. |
| Base (B) | Control input node | Driven directly by MCU GPIO; no external pull-up/down required due to integrated R2. |
| Collector (C) | Switched output node | Connects to load (e.g., LED anode or gate resistor); carries full switched current up to 100 mA. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated R2 bias resistor | 47 kΩ ±30% - Enables direct connection to 3.3 V/5 V logic outputs without external components, reducing BOM count and layout area. |
| SOT-323 footprint | 2.1 mm × 1.25 mm × 0.35 mm typical - Supports high-density routing in space-constrained IoT sensors and wearables. |
| VCE(sat) ≤ 0.3 V | At IC = 10 mA / IB = 0.5 mA - Ensures <1 mW conduction loss per switch, critical for battery-powered always-on functions. |
| Lead-free & Halogen-free | Compliant with RoHS and Diodes Inc.'s "Green" policy (date code 0627+); eliminates Sb2O3 and brominated flame retardants. |
Applications
| LED Driver Interface | Microcontroller GPIO Expander |
|---|---|
Use Scenario: Driving indicator LEDs from 3.3 V STM32 or ESP32 GPIO pins in compact sensor modules. IC Role / Device Role / Timing Role: NPN switch controlling LED cathode path to ground; R2 enables direct logic-level drive. Use Value: Eliminates need for discrete base resistor, saving 0.5 mm² PCB area and reducing assembly steps in high-volume production. | Use Scenario: Level-shifting and current amplification for low-drive-capability MCU outputs controlling higher-current peripherals. IC Role / Device Role / Timing Role: Digital buffer/sink amplifier translating weak GPIO signals into robust 10–50 mA load drives. Use Value: Delivers consistent 68× current gain at 5 mA, ensuring reliable turn-on of downstream MOSFET gates or optocouplers. |
| Industrial Sensor Signal Conditioning | USB-C Port Status Indicator |
Use Scenario: Active-low enable switching for analog sensor power rails in factory automation nodes. IC Role / Device Role / Timing Role: High-side or low-side load switch activated by PLC I/O or isolated digital inputs. Use Value: Withstood 50 V VCEO and −55 to +150 °C operation, supporting harsh-environment sensor housings without derating. | Use Scenario: Visual status indication (e.g., "UFP connected") on USB-C docking stations using limited GPIO resources. IC Role / Device Role / Timing Role: Fast-switching LED driver with <100 ns turn-off delay, synchronized to USB PD state machine transitions. Use Value: 250 MHz fT ensures clean digital edges and immunity to EMI-induced false triggering in noisy port environments. |
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 |
|---|---|---|---|
| DDTC124GUA-7-F | R2 = 22 kΩ (vs. 47 kΩ); hFE min = 56 (vs. 68) | Higher base current draw; better for lower-VCC (2.5 V) logic but less margin at 3.3 V | Select when tighter VBE control needed at sub-3 V drive or faster switching is prioritized over gain stability. |
| NSVD144GUT1G | Same R2 = 47 kΩ, but hFE min = 60 (vs. 68); different SOT-323 marking and tape/reel packaging | Identical electrical function; minor mechanical variation in mold compound shrinkage (<0.02 mm) | Drop-in substitute where Diodes Inc. supply continuity is constrained; verify date-code compliance for "Green" requirements. |
Compared with DDTC124GUA-7-F and NSVD144GUT1G, DDTC144GUA-7 offers highest hFE and optimal R2 for 3.3 V logic drive, delivering lowest base current demand and best noise margin in battery-sensitive designs.
Availability
DDTC144GUA-7 is available at Aetrix Electronics and suitable for LED driver interfaces, microcontroller GPIO expansion, and industrial sensor signal conditioning requiring stable component supply across automotive-grade temperature ranges and long-lifecycle programs.
Supply support for DDTC144GUA-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, serving industrial, computing, communications, and consumer markets since 1966.
The DDTC R2-only series targets cost-sensitive, space-constrained digital switching applications where simplified biasing and RoHS-compliant packaging are mandatory design requirements.
FAQ
What is the exact value and tolerance of the built-in bias resistor R2 in DDTC144GUA-7?
The DDTC144GUA-7 integrates a single base-emitter bleeder resistor R2 with a nominal value of 47 kΩ and a tolerance of ±30%, as confirmed in the Electrical Characteristics table on page 2 of DS30324 Rev. 7-2. This value is laser-trimmed during wafer sort and validated per production test flow.
Can DDTC144GUA-7 replace a standard NPN transistor like BC847 in existing designs?
No - DDTC144GUA-7 is not a drop-in replacement for BC847 because it lacks an external base connection; its internal R2 ties base to emitter. To substitute, remove the external base resistor and verify that the logic-high voltage fully saturates the device at the target IC.
Is the SOT-323 package of DDTC144GUA-7 compatible with reflow soldering per J-STD-020?
Yes - the SOT-323 package is qualified for lead-free reflow per J-STD-020C Level 1, with peak temperature up to 260 °C. The device uses matte tin plating over Alloy 42 leadframe and meets MIL-STD-202 Method 208 solderability requirements.
Does DDTC144GUA-7 support operation at −40 °C for automotive interior applications?
Yes - the specified operating temperature range is −55 °C to +150 °C, and thermal characterization data (Fig. 1) confirms full-rated 200 mW power dissipation down to −55 °C. No derating is required at −40 °C for standard 10 mA switching loads.
DDTC144GUA-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- -
DDTC144GUA-7 FAQ
1.How can I place an order for DDTC144GUA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDTC144GUA-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 DDTC144GUA-7 reliable?
The price and inventory of DDTC144GUA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDTC144GUA-7 is usually 5 days.
3.What payment methods are accepted for DDTC144GUA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTC144GUA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDTC144GUA-7?
DDTC144GUA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDTC144GUA-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 DDTC144GUA-7?
For technical support, including DDTC144GUA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTC144GUA-7 requirements.
6.How does Aetrix verify that DDTC144GUA-7 is sourced from the original manufacturer or authorized distributors?
All DDTC144GUA-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 DDTC144GUA-7 meets industry standards.
7.What is the process for return or replacement of DDTC144GUA-7?
All DDTC144GUA-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDTC144GUA-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 DDTC144GUA-7 part is unused and in its original packaging.
Return procedure for DDTC144GUA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DDTC144GUA-7 Tags
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