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Diodes Incorporated DDTC144WE-7
- Part No.:
- DDTC144WE-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- -
- Datasheet:
-
DDTC144WE-7.pdf
- Description:
- TRANS PREBIAS NPN 150MW SOT523
- Quantity:
- Payment:
- Shipping:
Inventory:3,588
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Product details
Overview
DDTC144WE-7 from Diodes Incorporated is an NPN pre-biased transistor in SOT523 package, featuring integrated R1 = 47 kΩ and R2 = 22 kΩ bias resistors (R1 ≠ R2), VI(OFF) = 0.8 V, VI(ON) = 2.5 V at IO = 2 mA, and IC(max) = 30 mA. It functions as a digital switch in low-power logic interface circuits, commonly used in portable sensor signal conditioning and LED driver enable stages.
For engineers reviewing the DDTC144WE-7 datasheet, DDTC144WE-7 pinout, DDTC144WE-7 application, or DDTC144WE-7 equivalent, key selection criteria include input threshold voltage compatibility with 3.3 V microcontroller GPIOs, guaranteed turn-on at ≤2.5 V, output saturation voltage <0.3 V at 2 mA load, and thermal performance under 150 mW power dissipation in space-constrained PCB layouts.
Technical Context
This device integrates an NPN transistor with two non-matching on-chip base bias resistors (R1 = 47 kΩ, R2 = 22 kΩ), enabling precise input threshold control and stable DC biasing without external components. Its R1/R2 ratio of ~2.14 supports reliable switching across temperature and process variation.
The SOT523 package delivers 833 °C/W junction-to-ambient thermal resistance on FR-4 board, supporting continuous operation from –55 °C to +150 °C. Input voltage range is –10 V to +40 V, with off-state leakage <0.5 μA at VCC = 50 V, making it suitable for high-impedance, low-quiescent-current control paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| R1 (Nominal) | 47 kΩ - Sets input current limit and defines lower threshold for logic-high recognition |
| R2 (Nominal) | 22 kΩ - Provides active base pull-down to ensure fast turn-off and reduce standby current |
| VI(OFF) | 0.8 V max - Guarantees device remains fully off when driven by weak or floating sources |
| VI(ON) | 2.5 V @ IO = 2 mA - Ensures reliable turn-on with standard 3.3 V logic outputs |
| VO(ON) | 0.3 V max @ IO = 2 mA - Delivers low-saturation output for minimal voltage drop in switched loads |
| PD | 150 mW - Enables use in thermally constrained 0.6 mm × 1.2 mm footprint applications |
| fT | 250 MHz - Supports clean edge response in digital switching up to ~30 MHz toggle rates |
Pinout & Package
Package: SOT523 - ultra-compact surface-mount plastic package (1.60 mm × 1.60 mm × 0.75 mm), matte tin-plated leads, moisture sensitivity level 1, weight ≈ 0.002 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Output reference node | Connected to ground or low-side load return; defines common reference for output current sink |
| 2 (Base) | Bias network junction | Internal connection point between R1 (input) and R2 (base-to-emitter pull-down); not externally accessible |
| 3 (Collector) | Switched output terminal | Sinks up to 30 mA load current to emitter; connects to VCC-side of LED, relay coil, or logic input |
Key Features
| Feature | Design Value |
|---|---|
| Integrated R1 ≠ R2 bias network | Eliminates need for two external resistors while enabling precise VI(ON)/VI(OFF) window control |
| Guaranteed VI(ON) ≤ 2.5 V @ 2 mA | Ensures full turn-on with 3.3 V CMOS outputs without margin loss due to process or temperature drift |
| Low VO(ON) ≤ 0.3 V @ 2 mA | Minimizes power loss and voltage headroom consumption in battery-powered load switching |
| AEC-Q101 qualified option available | Supports automotive-grade reliability requirements including PPAP documentation and IATF 16949 manufacturing |
| Halogen- and antimony-free "Green" construction | Meets RoHS 3 (2015/863/EU) with Br+Cl <1500 ppm and Sb <1000 ppm for eco-compliant end equipment |
Applications
| IoT Sensor Node Power Control | USB-C Port Configuration Detection |
|---|---|
|
Use Scenario: Enabling/disabling analog front-end circuitry in battery-powered environmental sensors based on host MCU command. IC Role / Device Role / Timing Role: Low-leakage NPN switch controlling 3.3 V supply rail to op-amp and ADC section. Use Value: 0.5 μA off-state leakage preserves battery life over multi-year deployments; 2.5 V VI(ON) ensures compatibility with sleep-mode GPIO thresholds. |
Use Scenario: Detecting CC pin voltage levels during USB-C plug insertion to determine orientation and source capability. IC Role / Device Role / Timing Role: Digital-level translator and current-limited switch interfacing CC line to microcontroller ADC input. Use Value: Built-in R1/R2 network provides defined voltage divider ratio without layout-sensitive external resistors; 40 V VIN rating withstands transient overshoot on CC line. |
| White LED Backlight Enable | Industrial PLC Digital Input Conditioning |
|
Use Scenario: Driving enable signal to constant-current LED driver IC in handheld medical display backlight. IC Role / Device Role / Timing Role: Logic-level interface between 1.8 V/3.3 V MCU GPIO and higher-voltage LED driver EN pin. Use Value: 0.3 V VO(ON) ensures full logic-high recognition at driver input; SOT523 footprint saves space in tight 0402-class layouts. |
Use Scenario: Level-shifting and current-limiting 24 V industrial field signals before feeding into 3.3 V FPGA I/O banks. IC Role / Device Role / Timing Role: High-impedance input buffer and controlled-current sink for isolated digital input stage. Use Value: –10 V to +40 V input range accommodates negative transients and noise spikes; 833 °C/W θJA allows sustained operation in unventilated enclosures. |
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 |
|---|---|---|---|
| DDTC144VE-7-F | R1 = 47 kΩ, R2 = 10 kΩ → higher R2/R1 ratio (0.21 vs. 0.47), resulting in higher VI(ON) = 3.0 V | Better suited for 5 V logic systems where higher noise immunity is required | Select when interfacing with 5 V microcontrollers or needing wider input hysteresis |
| DDTC124XE-7-F | R1 = 22 kΩ, R2 = 47 kΩ → inverted resistor ratio (2.14 vs. 0.47), yielding VI(ON) = 1.4 V | Optimized for ultra-low-threshold switching with 1.8 V I/O domains | Choose for battery-powered wearables using 1.8 V SoCs where minimal drive strength is acceptable |
Compared with DDTC144VE-7-F and DDTC124XE-7-F, DDTC144WE-7 offers balanced input threshold (2.5 V) ideal for 3.3 V systems, delivering optimal trade-off between noise margin and drive compatibility without requiring external resistor tuning.
Availability
DDTC144WE-7 is available at Aetrix Electronics and suitable for IoT sensor node power control, USB-C port configuration detection, and white LED backlight enable applications requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for DDTC144WE-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) E family of pre-biased transistors, designed specifically to replace dual-resistor discrete configurations in compact digital interface and load-switching applications.
FAQ
What is the maximum continuous collector current for DDTC144WE-7?
The absolute maximum rated output current is 30 mA per the datasheet's Absolute Maximum Ratings table. This value is validated under steady-state conditions at TA = +25°C with proper PCB thermal relief. Derating applies above +25°C per the Figure 1 derating curve, reaching ~15 mA at +85°C ambient on standard FR-4.
Can DDTC144WE-7 be used with 1.8 V logic inputs?
No - its specified VI(ON) is 2.5 V minimum at IO = 2 mA, meaning it will not reliably turn on with 1.8 V logic. For 1.8 V systems, consider DDTC124XE-7-F (VI(ON) = 1.4 V) or DDTC114YE-7-F (VI(ON) = 1.3 V), both verified in the same datasheet.
Is the SOT523 package lead-free and RoHS compliant?
Yes - DDTC144WE-7 is fully lead-free and RoHS 3 compliant (2015/863/EU), with no intentionally added lead, halogen content <900 ppm bromine and <900 ppm chlorine (total Br+Cl <1500 ppm), and antimony <1000 ppm, as certified by Diodes Incorporated's Green product definition.
Does this transistor support automotive qualification?
The base DDTC144WE-7 part is not AEC-Q101 qualified, but Diodes offers an automotive-grade variant (DDTC144WE-7-F with AEC-Q101 qualification) with PPAP documentation, manufactured in IATF 16949-certified facilities. Contact Diodes or Aetrix for automotive-grade ordering codes and test reports.
DDTC144WE-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:
- -
DDTC144WE-7 FAQ
1.How can I place an order for DDTC144WE-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDTC144WE-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 DDTC144WE-7 reliable?
The price and inventory of DDTC144WE-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDTC144WE-7 is usually 5 days.
3.What payment methods are accepted for DDTC144WE-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTC144WE-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDTC144WE-7?
DDTC144WE-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDTC144WE-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 DDTC144WE-7?
For technical support, including DDTC144WE-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTC144WE-7 requirements.
6.How does Aetrix verify that DDTC144WE-7 is sourced from the original manufacturer or authorized distributors?
All DDTC144WE-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 DDTC144WE-7 meets industry standards.
7.What is the process for return or replacement of DDTC144WE-7?
All DDTC144WE-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDTC144WE-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 DDTC144WE-7 part is unused and in its original packaging.
Return procedure for DDTC144WE-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DDTC144WE-7 Tags
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MUN5211T1G
onsemi
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DTC043ZEBTL
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DTC114EKAT146
Rohm Semiconductor
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DDTD113ZC-7-F
Diodes Incorporated
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DRDNB16W-7
Diodes Incorporated
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PDTC114ET,215
Nexperia USA Inc.
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PDTC143ZT,215
Nexperia USA Inc.
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PDTC143ET,215
Nexperia USA Inc.
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PDTC143XT,215
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MMUN2211LT1G
onsemi
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PDTC144ET,215
Nexperia USA Inc.
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PDTC124ET,215
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