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Diodes Incorporated DDTC144VE-7
- Part No.:
- DDTC144VE-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- -
- Datasheet:
-
DDTC144VE-7.pdf
- Description:
- TRANS PREBIAS NPN 150MW SOT523
- Quantity:
- Payment:
- Shipping:
Inventory:5,883
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Product details
Overview
DDTC144VE-7 from Diodes Incorporated is an NPN pre-biased transistor in SOT523 package with integrated R1=47kΩ and R2=22kΩ bias resistors, VI(OFF) = 1.0V (max), VI(ON) = 3.0V (typ), IOUT = 30mA, and DC current gain GI = 33 - used for digital logic-level switching in space-constrained load control circuits.
For engineers reviewing the DDTC144VE-7 datasheet, DDTC144VE-7 pinout, DDTC144VE-7 application, or DDTC144VE-7 equivalent, this part serves as a compact, RoHS-compliant, single-transistor solution for low-power signal inversion and interface buffering where input threshold and output saturation voltage must be tightly controlled.
Technical Context
This device integrates an NPN bipolar transistor with two non-matching on-chip resistors (R1 ≠ R2) to provide fixed-base biasing, eliminating external components for digital switching. Its R1/R2 ratio of ~2.14 enables precise turn-on/turn-off thresholds under varying supply conditions.
The SOT523 package supports high-density PCB layouts, while its 150mW power dissipation rating and 833°C/W thermal resistance require careful thermal management at sustained 30mA output. The 250MHz fT confirms suitability for low-speed digital switching-not RF or analog amplification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| R1 (Nominal) | 47kΩ - sets base current limit for predictable turn-on behavior at logic-high inputs |
| R2 (Nominal) | 22kΩ - provides active pull-down path to ensure fast, reliable turn-off when input is low |
| VI(OFF) (max) | 1.0V - guarantees transistor remains fully off with TTL or 1.8V logic low signals |
| VI(ON) (typ) | 3.0V - ensures robust conduction with standard 3.3V CMOS outputs without marginal biasing |
| IOUT (max) | 30mA - supports direct drive of small-signal loads like LEDs, MOSFET gates, or logic inputs |
| GI (min) | 33 - provides sufficient current gain to maintain saturated switch operation at 30mA collector load |
| fT | 250MHz - indicates adequate speed for <10MHz digital switching; not intended for RF use |
Pinout & Package
Package: SOT523 - ultra-small surface-mount plastic package (1.60 × 1.60 × 0.75 mm), moisture sensitivity level 1, matte tin-plated leads, 0.002g weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Output terminal / current sink node | Connected to load ground return; defines common-emitter switching configuration |
| 2 (Base) | Bias input node (via R1/R2 network) | Internally connected to R1 and R2 junction; accepts logic-level input without external resistor |
| 3 (Collector) | Input supply node / switched high-side connection | Connected to VCC (up to 50V); delivers switched current to load between collector and emitter |
Key Features
| Feature | Design Value |
|---|---|
| Integrated R1 ≠ R2 bias network | Eliminates two external resistors, reducing BOM count and layout area in digital interface circuits |
| SOT523 footprint | Enables placement in <1.0mm² board area-critical for wearables, sensor nodes, and miniaturized IoT modules |
| VI(OFF) ≤ 1.0V @ 100μA | Ensures guaranteed cutoff with sub-1.2V logic families (e.g., some low-voltage microcontrollers) |
| RoHS 3 & "Green" compliant | Meets <900ppm Br, <900ppm Cl, <1000ppm Sb - satisfies strict environmental requirements for automotive and medical end equipment |
Applications
| LED Indicator Control | Microcontroller GPIO Buffering |
|---|---|
|
Use Scenario: Driving status LEDs from 3.3V MCU GPIO pins with current limiting. IC Role / Device Role / Timing Role: NPN switch that sinks LED current from VCC to ground when GPIO goes high. Use Value: Eliminates need for discrete base resistor; VI(ON) = 3.0V ensures full conduction at typical MCU logic-high levels. |
Use Scenario: Level-shifting and current boosting for interfacing 1.8V logic to 5V peripherals. IC Role / Device Role / Timing Role: Digital inverter with defined input threshold and rail-to-rail output swing. Use Value: R1/R2 asymmetry provides hysteresis-free switching with clean transition at ~3.0V, avoiding metastability. |
| Low-Power Sensor Interface | Reset Signal Conditioning |
|
Use Scenario: Enabling/disabling analog sensor power rails based on host processor command. IC Role / Device Role / Timing Role: Load switch controlling VCC path to sensor ICs with minimal quiescent current. Use Value: IO(OFF) ≤ 0.5μA ensures negligible leakage during sleep mode; 30mA rating covers most sensor peak loads. |
Use Scenario: Debouncing and inverting manual reset button signals before feeding to PMIC or SoC reset input. IC Role / Device Role / Timing Role: Active-low to active-high signal translator with noise-immune input threshold. Use Value: VI(OFF) ≤ 1.0V rejects ESD-induced glitches below logic-low threshold; fast turn-off via R2 ensures clean reset pulse edge. |
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 |
|---|---|---|---|
| DDTC143ZE-7-F | R1 = 4.7kΩ, R2 = 47kΩ; higher IOUT = 100mA; VI(ON) = 2.5V (typ) | Better suited for 5V logic systems requiring higher drive strength and lower input threshold | Select when driving heavier loads (>30mA) or interfacing with 5V microcontrollers |
| DDTC124XE-7-F | R1 = 22kΩ, R2 = 47kΩ; IOUT = 50mA; VI(ON) = 1.4V (typ); GI = 68 | Lower input threshold improves compatibility with 1.8V/2.5V logic; higher gain enables weaker drive sources | Prefer for battery-powered devices using ultra-low-voltage MCUs where input drive capability is limited |
Compared with DDTC144VE-7, DDTC143ZE-7-F offers greater output current but less input voltage margin, while DDTC124XE-7-F provides superior low-voltage compatibility at the cost of reduced maximum load current - choice depends on system logic family and load requirements.
Availability
DDTC144VE-7 is available at Aetrix Electronics and suitable for LED indicator control, microcontroller GPIO buffering, and low-power sensor interface applications requiring stable component supply, consistent marking (N21), and full traceability.
Supply support for DDTC144VE-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, energy-efficient components for industrial, computing, consumer, and automotive markets.
This part belongs to the DDTC (R1≠R2 Series) pre-biased transistor product line, designed specifically to reduce design complexity and PCB area in digital interface and load-switching applications across portable and space-constrained electronics.
FAQ
What is the maximum continuous collector current for DDTC144VE-7?
The absolute maximum rated output current is 30mA per the datasheet's Electrical Characteristics table. This value is validated under VCC = 50V and TA = +25°C with proper PCB thermal relief. Sustained operation above 20mA requires verification of junction temperature rise using the 833°C/W RθJA and actual board layout.
Can DDTC144VE-7 replace a standard 2N3904 with external bias resistors?
Yes - it replaces a 2N3904 plus two discrete bias resistors (RB and RBE) in common-emitter switching configurations. Its integrated R1=47kΩ and R2=22kΩ replicate a typical digital switch bias network, but unlike discrete implementations, it guarantees matched resistor tracking and eliminates layout sensitivity.
Is DDTC144VE-7 qualified for automotive applications?
No - DDTC144VE-7 is not AEC-Q101 qualified. While Diodes offers automotive-grade variants in the same series (e.g., parts marked with AEC suffixes), this specific orderable part number is intended for commercial/industrial use. Automotive designs require explicit PPAP documentation and IATF 16949-manufactured lots.
What does the marking 'N21' on the device indicate?
'N21' is the top-side product type and date code marking: 'N' denotes the year 2025 (per Diodes' coding scheme), and '21' identifies this as the DDTC144VE variant within the R1≠R2 series. It is not a date-of-manufacture code - full date codes follow the YM XX format described in the datasheet's Marking Information section.
DDTC144VE-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:
- -
DDTC144VE-7 FAQ
1.How can I place an order for DDTC144VE-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDTC144VE-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 DDTC144VE-7 reliable?
The price and inventory of DDTC144VE-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDTC144VE-7 is usually 5 days.
3.What payment methods are accepted for DDTC144VE-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTC144VE-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDTC144VE-7?
DDTC144VE-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDTC144VE-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 DDTC144VE-7?
For technical support, including DDTC144VE-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTC144VE-7 requirements.
6.How does Aetrix verify that DDTC144VE-7 is sourced from the original manufacturer or authorized distributors?
All DDTC144VE-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 DDTC144VE-7 meets industry standards.
7.What is the process for return or replacement of DDTC144VE-7?
All DDTC144VE-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDTC144VE-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 DDTC144VE-7 part is unused and in its original packaging.
Return procedure for DDTC144VE-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DDTC144VE-7 Tags
-
MUN5211T1G
onsemi
-
DTC043ZEBTL
Rohm Semiconductor
-
DTC114EKAT146
Rohm Semiconductor
-
DDTD113ZC-7-F
Diodes Incorporated
-
DRDNB16W-7
Diodes Incorporated
-
PDTC114ET,215
Nexperia USA Inc.
-
PDTC143ZT,215
Nexperia USA Inc.
-
PDTC143ET,215
Nexperia USA Inc.
-
PDTC143XT,215
Nexperia USA Inc.
-
MMUN2211LT1G
onsemi
-
PDTC144ET,215
Nexperia USA Inc.
-
PDTC124ET,215
Nexperia USA Inc.
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