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Diodes Incorporated DDTC144VCA-7
- Part No.:
- DDTC144VCA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
DDTC144VCA-7.pdf
- Description:
- TRANS PREBIAS NPN 50V SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,860
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Product details
Overview
DDTC144VCA-7 from Diodes Incorporated is an NPN pre-biased small-signal transistor in SOT23 package, featuring integrated bias resistors R1 = 47 kΩ and R2 = 10 kΩ (R1 ≠ R2), VI(OFF) = 1.0 V (max), IO = 30 mA, and VCE(SAT) ≤ 0.3 V at IC/IB = 5 mA/0.25 mA. It serves as a logic-level interface switch in automotive body control modules for LED indicator drivers and sensor signal conditioning.
For engineers reviewing the DDTC144VCA-7 datasheet, DDTC144VCA-7 pinout, DDTC144VCA-7 application, or DDTC144VCA-7 equivalent, this part is selected for low-input-current digital switching where precise turn-on voltage (VI(ON) = 3.0 V @ IO = 2 mA), AEC-Q101 qualification, and resistor-ratio tolerance (±20%) are critical to ensure robust noise immunity and stable biasing across temperature.
Technical Context
This device integrates two discrete resistors (R1 = 47 kΩ, R2 = 10 kΩ) directly into the emitter-base path of an NPN epitaxial planar transistor, enabling single-pin logic-level drive without external bias network. Its VI(OFF) = 1.0 V and VI(ON) = 3.0 V define a clean input threshold window for TTL/CMOS-compatible switching.
The 30 mA output current rating, 0.3 V saturation voltage at 5 mA/0.25 mA drive, and 250 MHz fT support fast-switching applications up to ~10 MHz with minimal propagation delay. Thermal resistance RθJA = 625 °C/W reflects its SOT23 footprint's inherent power dissipation limit of 200 mW on FR4.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| R1 Resistor | 47 kΩ ±30% - sets base current limit for predictable turn-on behavior under varying supply conditions |
| R2 Resistor | 10 kΩ ±30% - provides active pull-down to ensure reliable turn-off and reduce leakage-induced false triggering |
| VI(OFF) | 1.0 V max @ IO = 100 μA - guarantees cutoff when driven by low-voltage logic or noisy microcontroller GPIO |
| VI(ON) | 3.0 V min @ IO = 2 mA - ensures full conduction with standard 3.3 V CMOS outputs while rejecting sub-threshold noise |
| VCE(SAT) | 0.3 V max @ IC/IB = 5 mA/0.25 mA - minimizes power loss and self-heating in continuous-duty LED or relay driver stages |
| GL (DC Current Gain) | 33 min @ VCE = 5 V, IC = 5 mA - enables stable gain-controlled switching without oscillation in feedback-sensitive circuits |
| fT | 250 MHz typ @ VCE = 10 V, IE = 5 mA - supports high-speed digital interface applications such as PWM dimming control signals |
Pinout & Package
SOT23 plastic surface-mount package with matte tin-plated leads, UL 94V-0 flammability rating, moisture sensitivity level 1, and approximate weight of 0.008 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Input reference node / GND return | Connected internally to R2; serves as common reference for bias network and output load return path |
| 2 (Base) | Control input node | Direct connection point for external logic signal; internal R1–R2 divider applies bias to transistor base-emitter junction |
| 3 (Collector) | Switched output node | High-side switching output capable of sinking up to 30 mA; electrically isolated from input via internal resistor network |
Key Features
| Feature | Design Value |
|---|---|
| Integrated R1 ≠ R2 bias network | Eliminates need for two external resistors, reducing PCB area by >1.2 mm² and assembly cost in high-volume automotive modules |
| AEC-Q101 qualification | Validated for operation from −55 °C to +150 °C with PPAP capability-enables direct use in under-hood ECUs without requalification |
| Halogen- and antimony-free "Green" construction | Meets <900 ppm Br, <900 ppm Cl, <1000 ppm Sb - satisfies EU ELV and JIG-101 environmental compliance for Tier-1 automotive supply chains |
| Low input current requirement | IL = 0.16 mA @ VI = 5 V - reduces drive burden on 3.3 V microcontrollers and extends battery life in always-on sensor nodes |
| Thermal performance on FR4 | RθJA = 625 °C/W with minimum pad layout - allows sustained 30 mA switching at ambient ≤ 85 °C without heatsinking |
Applications
| Automotive Interior Lighting Control | Industrial Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Driving discrete LEDs in door panel status indicators and HVAC display backlighting within vehicle cabin modules. IC Role / Device Role / Timing Role: NPN pre-biased switch providing logic-level ON/OFF control with built-in current limiting and noise-immune threshold. Use Value: Eliminates external bias resistors and reduces BOM count by one per channel, improving long-term reliability over temperature cycling in non-hermetic enclosures. |
Use Scenario: Level-shifting and buffering analog sensor outputs (e.g., thermistor voltage dividers) before ADC sampling in PLC I/O modules. IC Role / Device Role / Timing Role: Active pull-down switch ensuring defined low-state during sensor sleep mode or fault conditions. Use Value: VI(OFF) ≤ 1.0 V prevents false activation from ESD-coupled transients on unshielded sensor cables in factory-floor environments. |
| Consumer Appliance Panel Interface | Medical Diagnostic Equipment Status Indication |
|
Use Scenario: Controlling bi-color LED status indicators on microwave oven control panels and washing machine UI boards. IC Role / Device Role / Timing Role: Single-transistor logic interface replacing discrete BJT + dual-resistor solution for space-constrained front-panel PCBs. Use Value: SOT23 footprint and 0.008 g weight enable placement adjacent to tactile switches without mechanical stress on solder joints during repeated button actuation. |
Use Scenario: Isolating microcontroller GPIO lines from LED pilot lights in portable ultrasound and ECG monitor front-end assemblies. IC Role / Device Role / Timing Role: Safe, low-power switching element compliant with IEC 60601-1 creepage/clearance requirements due to internal resistor isolation. Use Value: AEC-Q101 qualification and halogen-free materials meet medical OEM requirements for flame-retardant, RoHS-compliant subsystem components. |
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 |
|---|---|---|---|
| DDTC144WCA-7-F | R1 = 47 kΩ, R2 = 22 kΩ → higher R2 increases VI(ON) to 2.5 V and reduces IL to 0.16 mA | Better noise margin in high-EMI industrial settings but slower turn-on edge due to reduced base drive | Select when system requires tighter VI(ON) tolerance and lower input current draw at 5 V supply |
| NSV144V3T1G | Same R1/R2 values (47k/10k), but rated only to +125 °C (not AEC-Q101); RθJA = 500 °C/W | Approved for commercial/industrial use only; not qualified for automotive under-hood deployment | Choose for cost-sensitive consumer electronics where AEC-Q101 and extended temperature are unnecessary |
Compared with DDTC144WCA-7-F and NSV144V3T1G, DDTC144VCA-7 offers the optimal balance of automotive-grade reliability, precise 3.0 V turn-on threshold, and lowest thermal resistance among 47k/10k-ratio pre-biased transistors in SOT23.
Availability
DDTC144VCA-7 is available at Aetrix Electronics and suitable for automotive body control units, industrial sensor interface modules, and medical diagnostic equipment requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for DDTC144VCA-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 computing markets since 1960.
This part belongs to the DDTC (R1≠R2 Series) CA family-designed specifically for simplified, space-efficient digital switching in AEC-Q101-compliant automotive electronics with integrated bias networks.
FAQ
What is the maximum continuous collector current for DDTC144VCA-7?
The absolute maximum continuous collector current is 30 mA, verified per DS30330 Rev. 11–2 Section "Absolute Maximum Ratings." This rating assumes operation at TA = +25°C with proper PCB thermal relief; derating is required above 85°C ambient per the power dissipation vs. temperature curve on page 4.
Does DDTC144VCA-7 require external bias resistors?
No. It integrates R1 = 47 kΩ and R2 = 10 kΩ internally, eliminating the need for external bias components. The schematic shows R1 between base and input, and R2 between base and emitter-this configuration enables single-pin logic-level drive with defined turn-on/off thresholds.
Is DDTC144VCA-7 suitable for 5 V microcontroller GPIO interfacing?
Yes. With VI(ON) = 3.0 V (min) and VI(OFF) = 1.0 V (max), it reliably switches using standard 5 V TTL or 3.3 V CMOS outputs. Input current is only 0.16 mA at 5 V, placing negligible load on GPIO pins while maintaining noise immunity.
How does the R1 ≠ R2 architecture improve switching performance?
The asymmetric resistor ratio (47 kΩ / 10 kΩ) provides stronger active pull-down via R2 during turn-off, reducing storage time and preventing unintended conduction from leakage or capacitive coupling. This improves response fidelity in PWM-driven LED dimming and fast GPIO toggling applications.
DDTC144VCA-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- 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):
- 10 kOhms
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 33 @ 5mA, 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-23-3
DDTC144VCA-7 FAQ
1.How can I place an order for DDTC144VCA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDTC144VCA-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 DDTC144VCA-7 reliable?
The price and inventory of DDTC144VCA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDTC144VCA-7 is usually 5 days.
3.What payment methods are accepted for DDTC144VCA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTC144VCA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDTC144VCA-7?
DDTC144VCA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDTC144VCA-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 DDTC144VCA-7?
For technical support, including DDTC144VCA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTC144VCA-7 requirements.
6.How does Aetrix verify that DDTC144VCA-7 is sourced from the original manufacturer or authorized distributors?
All DDTC144VCA-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 DDTC144VCA-7 meets industry standards.
7.What is the process for return or replacement of DDTC144VCA-7?
All DDTC144VCA-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDTC144VCA-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 DDTC144VCA-7 part is unused and in its original packaging.
Return procedure for DDTC144VCA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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