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Diodes Incorporated DDTC144WCA-7
- Part No.:
- DDTC144WCA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- -
- Datasheet:
-
DDTC144WCA-7.pdf
- Description:
- TRANS PREBIAS NPN 200MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:152
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Product details
Overview
DDTC144WCA-7 from Diodes Incorporated is an NPN pre-biased small-signal transistor in SOT23 package, featuring built-in bias resistors R1 = 47 kΩ and R2 = 22 kΩ (R1 ≠ R2), VCEO = 50 V, IC(MAX) = 30 mA, and DC current gain (hFE) = 56 at VCE = 5 V, IC = 5 mA. It delivers reliable digital switching in automotive body control modules, LED driver interfaces, and low-power logic-level translation circuits.
For engineers reviewing the DDTC144WCA-7 datasheet, DDTC144WCA-7 pinout, DDTC144WCA-7 application, or DDTC144WCA-7 equivalent, key selection criteria include input voltage thresholds (VIN(OFF) = 0.8 V, VIN(ON) = 2.5 V @ IO = 3 mA), output saturation voltage (VCE(SAT) ≤ 0.3 V), AEC-Q101 qualification, and SOT23 thermal performance (RθJA = 625 °C/W).
Technical Context
This device integrates a monolithic NPN transistor with two discrete on-die biasing resistors-R1 connected between base and supply, R2 between base and emitter-enabling single-resistor input drive and eliminating external bias network design. Its R1/R2 ratio of ~2.14 supports stable saturation under varying temperature and process conditions.
Designed for high-reliability automotive applications, it operates across –55 °C to +150 °C, meets AEC-Q101 stress testing requirements, and uses halogen- and antimony-free "Green" molding compound compliant with RoHS 2 (2011/65/EU). The SOT23 package ensures compatibility with standard surface-mount assembly processes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 50 V - Maximum collector-emitter voltage before breakdown; enables use in 24 V automotive systems with margin. |
| IC(MAX) | 30 mA - Continuous collector current limit; suitable for driving small relays, LEDs, or logic inputs. |
| R1 / R2 | 47 kΩ / 22 kΩ - Asymmetric internal bias network enabling precise turn-on/turn-off thresholds and noise immunity. |
| VIN(OFF) / VIN(ON) | 0.8 V / 2.5 V @ IO = 3 mA - Input voltage thresholds define clean logic-level switching behavior with hysteresis-like margin. |
| PD | 200 mW - Power dissipation rating at TA = 25 °C; derates linearly above 25 °C per RθJA = 625 °C/W. |
| hFE | 56 - DC current gain at VCE = 5 V, IC = 5 mA; ensures sufficient drive capability for downstream loads without external amplification. |
Pinout & Package
Package: SOT23 - Surface-mount plastic package with matte tin-plated leads, moisture sensitivity level 1 (J-STD-020), UL 94V-0 flammability rating, and 0.008 g typical weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Emitter terminal | Reference node for bias network; connects to ground or low-side return path in switch configurations. |
| 2 (Base) | Internal base node | Not externally accessible; internally connected to R1 and R2 junction - no external base connection required. |
| 3 (Collector) | Collector terminal | Output node; sinks load current when device is ON; requires external pull-up or supply connection. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated R1 ≠ R2 bias network | Eliminates need for two external resistors; reduces PCB area by >30% and improves production yield vs. discrete bias solutions. |
| AEC-Q101 qualification | Validated for automotive-grade reliability including HTOL, TC, HAST, and ESD testing - suitable for under-hood and body electronics. |
| Halogen- and antimony-free "Green" construction | Meets strict environmental compliance: Br < 900 ppm, Cl < 900 ppm (Br+Cl < 1500 ppm), Sb < 1000 ppm. |
| SOT23 footprint compatibility | Standardized 3-pin layout enables drop-in replacement in existing designs using JEDEC MS-012 outline. |
Applications
| Automotive Body Control Module | LED Indicator Driver |
|---|---|
|
Use Scenario: Driving door lock actuators, mirror position controls, and interior lighting via microcontroller GPIOs. IC Role / Device Role: Digital switch translating 3.3 V/5 V logic signals into 12 V/24 V load control paths. Use Value: Eliminates external bias resistors and reduces BOM count while maintaining AEC-Q101 compliance for OEM production. |
Use Scenario: Controlling status LEDs on instrument clusters and center consoles with tight space constraints. IC Role / Device Role: Low-current saturated switch delivering up to 30 mA to indicator LEDs with <0.3 V dropout. Use Value: Ensures consistent brightness across temperature (-55 °C to +150 °C) without recalibration or feedback compensation. |
| Industrial Sensor Interface | Low-Power Logic-Level Translation |
|
Use Scenario: Isolating and conditioning digital outputs from Hall-effect or reed-switch sensors in factory automation equipment. IC Role / Device Role: Signal conditioner converting open-collector sensor outputs into clean CMOS-compatible logic levels. Use Value: Built-in hysteresis-like input threshold (VIN(OFF) = 0.8 V, VIN(ON) = 2.5 V) rejects EMI-induced false triggers in noisy environments. |
Use Scenario: Interfacing 1.8 V FPGA I/O with 3.3 V peripheral buses in portable medical devices. IC Role / Device Role: Unidirectional level shifter operating as active-low buffer with defined input/output voltage windows. Use Value: Enables robust signal translation without external pull-ups or level-shifting ICs, reducing power and component count. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar pre-biased transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DDTC144VCA-7-F | R1 = 47 kΩ, R2 = 10 kΩ → lower R2 yields higher input current (0.36 mA vs. 0.16 mA at VIN = 5 V) and faster turn-on. | Better suited for high-speed switching (>100 kHz) where reduced propagation delay matters; less optimal for ultra-low-power sleep-mode interfaces. | Select when drive strength and speed outweigh quiescent current concerns in battery-powered nodes. |
| DDTC124XCA-7-F | R1 = 22 kΩ, R2 = 47 kΩ → inverted R1/R2 ratio increases VIN(ON) to 1.4 V and reduces gain margin; hFE = 68. | Offers higher noise immunity in high-voltage industrial settings but requires stronger input drive to saturate reliably. | Prefer where input signal swing exceeds 2.5 V and system-level noise rejection is prioritized over minimal drive requirements. |
Compared with DDTC144VCA-7-F and DDTC124XCA-7-F, DDTC144WCA-7 provides the lowest input current (0.16 mA @ 5 V) and highest VIN(OFF)/VIN(ON) separation (0.8 V / 2.5 V), making it optimal for energy-sensitive automotive microcontroller I/O expansion with robust noise margin.
Availability
DDTC144WCA-7 is available at Aetrix Electronics and suitable for automotive body electronics, LED driver circuits, and industrial sensor interface designs requiring stable component supply, AEC-Q101 compliance, and long-term lifecycle support.
Supply support for DDTC144WCA-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 since 1959.
This part belongs to the DDTC (R1≠R2 Series) CA family of pre-biased transistors engineered specifically for simplified digital switching in space-constrained, thermally demanding automotive and industrial applications.
FAQ
What is the maximum operating temperature for DDTC144WCA-7?
The DDTC144WCA-7 is rated for operation from –55 °C to +150 °C, fully qualified per AEC-Q101 for high-temperature automotive environments such as engine compartments and under-dash control units. Its thermal resistance (RθJA = 625 °C/W) assumes mounting on FR4 with minimum recommended pad layout per AP02001.
Does DDTC144WCA-7 require external bias resistors?
No. DDTC144WCA-7 integrates R1 = 47 kΩ and R2 = 22 kΩ on-die, forming a complete pre-biased NPN switch. Only three external connections are needed: collector (pin 3), emitter (pin 1), and input signal (pin 1 to pin 2, i.e., emitter-to-base drive). No external resistors are required for basic switching operation.
How does the R1 ≠ R2 configuration improve performance over symmetric bias networks?
The asymmetric R1/R2 ratio (47 kΩ / 22 kΩ) creates distinct input voltage thresholds: VIN(OFF) = 0.8 V and VIN(ON) = 2.5 V. This provides inherent noise margin and prevents oscillation near switching thresholds - especially valuable in electrically noisy automotive and industrial settings where signal integrity is critical.
Is DDTC144WCA-7 compatible with lead-free reflow soldering profiles?
Yes. DDTC144WCA-7 is fully RoHS-compliant and lead-free, with matte tin-plated leads qualified per MIL-STD-202, Method 208. It supports standard Pb-free reflow profiles (peak temperature ≤ 260 °C, time above liquidus ≤ 60 seconds) and has moisture sensitivity level 1 (MSL-1), requiring no dry-pack handling prior to assembly.
DDTC144WCA-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:
- -
DDTC144WCA-7 FAQ
1.How can I place an order for DDTC144WCA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDTC144WCA-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 DDTC144WCA-7 reliable?
The price and inventory of DDTC144WCA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDTC144WCA-7 is usually 5 days.
3.What payment methods are accepted for DDTC144WCA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTC144WCA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDTC144WCA-7?
DDTC144WCA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDTC144WCA-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 DDTC144WCA-7?
For technical support, including DDTC144WCA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTC144WCA-7 requirements.
6.How does Aetrix verify that DDTC144WCA-7 is sourced from the original manufacturer or authorized distributors?
All DDTC144WCA-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 DDTC144WCA-7 meets industry standards.
7.What is the process for return or replacement of DDTC144WCA-7?
All DDTC144WCA-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDTC144WCA-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 DDTC144WCA-7 part is unused and in its original packaging.
Return procedure for DDTC144WCA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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