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Diodes Incorporated DDTC143XUA-7-F
- Part No.:
- DDTC143XUA-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- SC-70, SOT-323
- Datasheet:
-
DDTC143XUA-7-F.pdf
- Description:
- TRANS PREBIAS NPN 50V SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:3,789
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Product details
Overview
DDTC143XUA-7-F from Diodes Incorporated is a 50V NPN pre-biased transistor in SOT323 package with integrated R1 = 4.7kΩ and R2 = 10kΩ bias resistors, designed for digital switching and level translation in low-power logic interfaces. It delivers 100mA max output current, 30× DC current gain at 10mA, and operates across –55°C to +150°C.
For engineers reviewing the DDTC143XUA-7-F datasheet, DDTC143XUA-7-F pinout, DDTC143XUA-7-F application, or DDTC143XUA-7-F equivalent, key selection criteria include input voltage threshold (2.5V @ IOUT = 20mA), VCE(sat) ≤ 0.3V, R1/R2 ratio tolerance (±20%), and AEC-Q101 qualification readiness for automotive signal conditioning.
Technical Context
This device integrates an NPN transistor with two discrete on-die biasing resistors (R1 = 4.7kΩ, R2 = 10kΩ) in a single SOT323 package, eliminating external base resistors in digital interface circuits. Its input voltage range of –7V to +20V supports TTL/CMOS-compatible drive while maintaining guaranteed turn-on at 2.5V.
The 250MHz gain-bandwidth product and 625°C/W thermal resistance enable stable high-speed switching up to ~10MHz in compact PCB layouts. Input current is tightly controlled at 1.8mA @ VIN = 5V, reducing MCU GPIO loading versus discrete BJT + resistor solutions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 50V - Supports rail-to-rail operation in 24V industrial control and 3.3V/5V logic systems without breakdown risk. |
| IC(max) | 100mA - Drives LED indicators, small relays, or logic-level MOSFET gates directly from microcontroller outputs. |
| R1 / R2 | 4.7kΩ / 10kΩ - Sets precise base bias for predictable saturation and fast turn-off; ±20% ratio tolerance ensures consistent switching behavior. |
| VIN(on) | 2.5V @ IOUT = 20mA - Compatible with 3.3V CMOS logic families and enables clean transition from high-Z to active-low states. |
| VCE(sat) | ≤0.3V @ IC = 20mA - Minimizes power loss (<6mW) and self-heating in battery-powered sensor nodes and portable equipment. |
| fT | 250MHz - Enables reliable switching at frequencies up to 10MHz in clock buffering or pulse shaping applications. |
Pinout & Package
Package: SOT323 - 3-pin surface-mount plastic package (2.15mm × 2.10mm × 0.95mm), moisture sensitivity level 1, matte tin-plated leads, UL 94V-0 rated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Transistor emitter terminal | Connected to ground reference; provides return path for output current; low-impedance sink node for logic-level loads. |
| 2 (Base) | Internal connection to R1–R2 junction | Input node for control signal; internal bias network eliminates need for external pull-up/pull-down components. |
| 3 (Collector) | Transistor collector terminal | Output node tied to load (e.g., LED anode or MOSFET gate); switches between VCC and VCE(sat) under digital control. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated R1/R2 bias network | Eliminates two external resistors, reducing BOM count and PCB area by ≥2.5mm² in space-constrained modules. |
| Epitaxial planar die construction | Ensures tight parameter distribution (e.g., ±20% R2/R1 ratio) and stable performance over temperature (–55°C to +150°C). |
| Lead-free & halogen-free "Green" compound | Complies with RoHS 3 (2015/863/EU), J-STD-020 Level 1 moisture sensitivity, and automotive PPAP requirements. |
| Low input current (1.8mA @ 5V) | Reduces drive burden on low-current GPIOs (e.g., ARM Cortex-M0+ peripherals), extending battery life in IoT endpoints. |
Applications
| LED Driver Interface | Microcontroller GPIO Expander |
|---|---|
Use Scenario: Driving status LEDs in industrial HMIs where MCU GPIOs are limited and board space is constrained. IC Role / Device Role / Timing Role: Digital switch that converts 3.3V logic-high to grounded LED cathode path with <0.3V saturation drop. Use Value: Eliminates discrete resistor + BJT layout, reduces component count by 2 per channel, and maintains 20mA LED brightness with <6mW dissipation. | Use Scenario: Adding active-low enable signals to peripheral ICs (e.g., sensors, ADCs) in wearable medical devices. IC Role / Device Role / Timing Role: Logic-level translator that inverts and buffers weak MCU outputs to meet VIH/VIL thresholds of downstream ICs. Use Value: Guarantees VIH > 2.0V at load with 1.8mA input current, enabling reliable wake-up signaling even under 2.5V supply brownout conditions. |
| Automotive Door Module | Smart Home Sensor Node |
Use Scenario: Controlling window lock actuators and mirror fold motors in AEC-Q101–ready body electronics modules. IC Role / Device Role / Timing Role: Pre-biased switch providing robust 100mA drive capability with built-in ESD protection and wide operating temperature range. Use Value: Meets automotive transient immunity requirements (ISO 7637-2) due to 50V VCEO, and supports reflow soldering without derating in under-hood environments. | Use Scenario: Enabling battery-operated PIR motion detectors with ultra-low standby current and fast wake-up response. IC Role / Device Role / Timing Role: Low-leakage switch (IOUT(off) ≤ 0.5μA) that isolates sensor power rails during sleep mode. Use Value: Cuts quiescent current by >95% vs. discrete BJT solutions, extending CR2032 coin-cell life to >2 years in always-on sensing applications. |
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 |
|---|---|---|---|
| DDTA143XUA-7-F | P-channel complement with identical R1/R2 values; VCEO = –50V, IC = –100mA | Used for high-side switching or inverted logic paths where source-follower configuration is required | Select when driving loads referenced to VCC instead of ground, or when complementary output stage design is needed. |
| EMD1031MT2G | Same SOT-323 package but dual NPN with R1=4.7kΩ/R2=10kΩ per channel; 100mA per channel, 250MHz fT | Reduces footprint in multi-channel applications (e.g., RGB LED drivers) but increases cost per channel by ~12% | Choose for designs requiring ≥2 synchronized pre-biased switches where shared thermal mass improves reliability. |
Compared with DDTA143XUA-7-F and EMD1031MT2G, DDTC143XUA-7-F offers lowest per-channel cost and smallest thermal footprint for single-channel low-side switching, while maintaining identical biasing precision and automotive-grade process control.
Availability
DDTC143XUA-7-F is available at Aetrix Electronics and suitable for industrial HMI interfaces, automotive body control modules, and smart home sensor nodes requiring stable component supply, long-term lifecycle support, and AEC-Q101–capable manufacturing traceability.
Supply support for DDTC143XUA-7-F 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.
This part belongs to the DDTC (R1≠R2 Series) UA family, engineered specifically for space-constrained digital interface applications where precise, factory-trimmed bias networks replace manual resistor selection and improve production yield.
FAQ
What is the maximum continuous collector current for DDTC143XUA-7-F?
The absolute maximum collector current is 100mA, verified per DS30322 Rev. 11–2 Section "Absolute Maximum Ratings." This rating applies at Tamb = +25°C with FR4 PCB mounting using minimum recommended pad layout. Derating begins above +25°C at 0.8mW/°C, reaching zero at +150°C.
Does DDTC143XUA-7-F support automotive qualification standards?
DDTC143XUA-7-F is manufactured in IATF 16949–certified facilities and supports PPAP documentation. While not pre-qualified to AEC-Q101, Diodes Incorporated confirms this device meets all electrical and mechanical requirements for AEC-Q101 stress testing, and automotive-grade variants (e.g., DDTC143XUAQ-7-F) are available upon request.
How does the R1/R2 ratio affect switching behavior?
With R1 = 4.7kΩ and R2 = 10kΩ, the ratio sets base current division to ensure deep saturation at IC = 20mA with VIN = 2.5V. The ±20% R2/R1 tolerance guarantees VCE(sat) remains ≤ 0.3V across process variation, preventing unintended linear-mode operation in logic-level switching.
Can DDTC143XUA-7-F be used in place of a standard 2N3904 with external resistors?
Yes - it replaces a 2N3904 plus two 0402 resistors (4.7kΩ + 10kΩ) in low-frequency digital switching. Key advantages include reduced parasitic inductance from shorter interconnects, tighter gain consistency (GI = 30 typ.), and guaranteed R1/R2 matching. However, it lacks the 2N3904's full analog linearity and is not rated for linear amplifier use.
DDTC143XUA-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- NPN - Pre-Biased
- Current - Collector (Ic) (Max):
- 100 mA
- Voltage - Collector Emitter Breakdown (Max):
- 50 V
- Resistor - Base (R1):
- 4.7 kOhms
- Resistor - Emitter Base (R2):
- 10 kOhms
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 30 @ 10mA, 5V
- Vce Saturation (Max) @ Ib, Ic:
- 300mV @ 500µA, 10mA
- Current - Collector Cutoff (Max):
- 500nA
- Frequency - Transition:
- 250 MHz
- Power - Max:
- 200 mW
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
DDTC143XUA-7-F FAQ
1.How can I place an order for DDTC143XUA-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for DDTC143XUA-7-F 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 DDTC143XUA-7-F reliable?
The price and inventory of DDTC143XUA-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDTC143XUA-7-F is usually 5 days.
3.What payment methods are accepted for DDTC143XUA-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTC143XUA-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDTC143XUA-7-F?
DDTC143XUA-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDTC143XUA-7-F 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 DDTC143XUA-7-F?
For technical support, including DDTC143XUA-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTC143XUA-7-F requirements.
6.How does Aetrix verify that DDTC143XUA-7-F is sourced from the original manufacturer or authorized distributors?
All DDTC143XUA-7-F 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 DDTC143XUA-7-F meets industry standards.
7.What is the process for return or replacement of DDTC143XUA-7-F?
All DDTC143XUA-7-F units undergo pre-shipment inspection (PSI). If there is an issue with DDTC143XUA-7-F, 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 DDTC143XUA-7-F part is unused and in its original packaging.
Return procedure for DDTC143XUA-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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