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Diodes Incorporated DDTC144GCA-7
- Part No.:
- DDTC144GCA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- -
- Datasheet:
-
DDTC144GCA-7.pdf
- Description:
- TRANS PREBIAS NPN 200MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,886
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Product details
Overview
DDTC144GCA-7 from Diodes Incorporated is an NPN pre-biased small-signal transistor in SOT-23 package, featuring a built-in 47 kΩ bias resistor (R2 only), 50 V VCEO, 100 mA IC(max), and hFE = 68 at 5 mA/5 V. It is used in digital logic interface circuits for level translation and signal switching in portable consumer electronics.
For engineers reviewing the DDTC144GCA-7 datasheet, DDTC144GCA-7 pinout, DDTC144GCA-7 application, or DDTC144GCA-7 equivalent, key selection criteria include verified R2-only bias topology, guaranteed hFE minimum of 68, SOT-23 thermal resistance of 625 °C/W, and RoHS-compliant green molding compound with moisture sensitivity level 1.
Technical Context
This device implements a single-NPN transistor with integrated base-emitter biasing via external R2 resistor only-no R1-enabling simplified high-side switch or digital input buffer designs. Its 50 V breakdown ratings (VCBO, VCEO, VEBO) support operation across 3.3 V and 5 V logic domains with margin.
The 68 minimum hFE at IC = 5 mA ensures reliable saturation under standard microcontroller GPIO drive conditions (e.g., 0.5 mA base current), while fT = 250 MHz supports moderate-speed switching up to ~10 MHz without significant gain roll-off.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 50 V - Enables safe operation with 5 V rail + transient margin in IO interface applications |
| IC(max) | 100 mA - Supports driving LED indicators, small relays, or logic-level MOSFET gates |
| hFE | 68 min @ 5 mA/5 V - Guarantees saturation with ≤0.5 mA base drive from standard MCU pins |
| R2 | 47 kΩ ±30% - Sets fixed base bias for predictable turn-on threshold in digital switching |
| PD | 200 mW - Limits continuous power in SOT-23; derates linearly above 25°C ambient |
| fT | 250 MHz - Supports clean edge integrity in <10 MHz clock/data buffering |
Pinout & Package
SOT-23 plastic surface-mount package (JEDEC TO-236AB), 3-pin, 0.008 g weight, UL 94V-0 rated, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Emitter terminal | Reference node for bias network; connects to GND or low-side return path |
| 2 (Base) | Base terminal | Connected internally to R2; accepts input control signal or pull-up/pull-down |
| 3 (Collector) | Collector terminal | Output node; sinks load current when biased on; ties to VCC via load |
Key Features
| Feature | Design Value |
|---|---|
| R2-only bias topology | Eliminates need for external base resistor; reduces BOM count and PCB area in digital switch designs |
| RoHS-compliant green compound | Halogen- and antimony-free molding material meeting IPC-J-STD-609A Class 1 requirements |
| 625 °C/W RθJA | Thermal performance validated on FR4 board per AP02001 pad layout; enables 100 mA operation at ≤50°C ambient |
| IEBO = 65 μA max @ VEB = 4 V | Low leakage ensures stable off-state in battery-powered systems with high-impedance inputs |
Applications
| LED Driver Interface | Microcontroller GPIO Expander |
|---|---|
Use Scenario: Driving 20 mA indicator LEDs from 3.3 V MCU outputs with limited sink current capability. IC Role / Device Role / Timing Role: NPN switch providing current gain and voltage-level isolation between MCU and LED anode/cathode path. Use Value: Eliminates need for discrete base resistor; 68 hFE ensures full saturation with 0.3 V VCE(sat) at 10 mA load. | Use Scenario: Adding buffered digital inputs to resource-constrained MCUs using open-drain or pull-up configurations. IC Role / Device Role / Timing Role: Signal conditioner converting noisy or high-impedance sensor signals into clean CMOS-compatible logic levels. Use Value: 47 kΩ R2 sets precise turn-on threshold near 0.7 V; low IEBO preserves battery life in always-on sensing nodes. |
| Level Translation (3.3 V → 5 V) | Small-Signal Load Switch |
Use Scenario: Interfacing 3.3 V FPGA I/O banks to 5 V peripheral logic without level-shifter ICs. IC Role / Device Role / Timing Role: Active-low translator where FPGA output pulls base low to enable collector pull-up to 5 V rail. Use Value: 50 V VCEO provides headroom; 250 MHz fT maintains signal integrity up to 5 MHz data rates. | Use Scenario: Enabling/disabling power to low-current peripherals (e.g., sensors, EEPROM) in portable devices. IC Role / Device Role / Timing Role: High-side or low-side switch controlling VCC or GND path based on control logic state. Use Value: 100 mA rating supports typical sensor loads; 0.3 V VCE(sat) minimizes dropout and self-heating. |
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 |
|---|---|---|---|
| DDTC144ECA-7-F | Same R2 = 47 kΩ, but includes both R1 and R2 bias resistors (dual-resistor topology) | Supports higher noise immunity in EMI-prone environments due to R1-R2 voltage divider input | Select when input signal source impedance varies widely or noise rejection is critical |
| NSVDDTC144GCA-7 | Automotive-grade variant (AEC-Q101 qualified); identical electrical specs and R2 value | Approved for under-hood and infotainment power domains requiring extended temperature and reliability validation | Select for automotive OEM or Tier-1 designs requiring PPAP documentation and stress test compliance |
Compared with DDTC144GCA-7, DDTC144ECA-7-F adds input filtering via R1 but increases component count, while NSVDDTC144GCA-7 retains identical functionality with added automotive qualification-making it suitable for harsh-environment deployment without circuit redesign.
Availability
DDTC144GCA-7 is available at Aetrix Electronics and suitable for LED driver interfaces, microcontroller GPIO expansion, and 3.3 V-to-5 V level translation requiring stable component supply and consistent parametric performance across production lots.
Supply support for DDTC144GCA-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, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The DDTC R2-only series targets cost-sensitive, space-constrained digital interface applications-delivering simplified biasing, reduced PCB footprint, and guaranteed gain performance for logic-level switching without external resistors.
FAQ
What is the function of the "R2-only" configuration in DDTC144GCA-7?
The R2-only configuration means only a single 47 kΩ resistor connects the base to the emitter internally-no base-to-VCC resistor (R1). This creates a simple current-limited input that turns the transistor on when the base is pulled above ~0.7 V, ideal for direct connection to digital outputs without external bias components.
Can DDTC144GCA-7 replace a standard 2N3904 in switching applications?
No-it cannot directly replace a 2N3904 because it lacks an accessible base node for arbitrary biasing. The internal R2 fixes the base-emitter path, making it unsuitable for analog amplification or custom bias networks. It is optimized exclusively for digital switching with predefined turn-on behavior.
Is the SOT-23 package of DDTC144GCA-7 compatible with reflow soldering per J-STD-020?
Yes-the device is qualified for lead-free reflow per J-STD-020D with peak temperature up to 260°C. Its moisture sensitivity level 1 rating means it can be stored indefinitely at ≤30°C/60% RH without baking prior to assembly.
Does DDTC144GCA-7 support bidirectional signal routing?
No-it is a unidirectional NPN transistor with fixed emitter-base biasing. It functions only as a low-side switch or level translator with defined current direction (collector to emitter). Bidirectional operation would require complementary PNP/NPN pairs or dedicated analog switches.
DDTC144GCA-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:
- -
DDTC144GCA-7 FAQ
1.How can I place an order for DDTC144GCA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDTC144GCA-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 DDTC144GCA-7 reliable?
The price and inventory of DDTC144GCA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDTC144GCA-7 is usually 5 days.
3.What payment methods are accepted for DDTC144GCA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTC144GCA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDTC144GCA-7?
DDTC144GCA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDTC144GCA-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 DDTC144GCA-7?
For technical support, including DDTC144GCA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTC144GCA-7 requirements.
6.How does Aetrix verify that DDTC144GCA-7 is sourced from the original manufacturer or authorized distributors?
All DDTC144GCA-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 DDTC144GCA-7 meets industry standards.
7.What is the process for return or replacement of DDTC144GCA-7?
All DDTC144GCA-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDTC144GCA-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 DDTC144GCA-7 part is unused and in its original packaging.
Return procedure for DDTC144GCA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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