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Diodes Incorporated DDTC115EE-7
- Part No.:
- DDTC115EE-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- -
- Datasheet:
-
DDTC115EE-7.pdf
- Description:
- TRANS PREBIASED NPN 150MW SOT523
- Quantity:
- Payment:
- Shipping:
Inventory:652
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Product details
Overview
DDTC115EE-7 from Diodes Incorporated is an NPN pre-biased transistor in SOT523 package with integrated bias resistors R1 = R2 = 100 kΩ, designed for digital switching and level translation in low-current logic interface circuits. It delivers VO(on) ≤ 0.3 V at IO = 1 mA, supports VI(on) ≥ 3 V for reliable turn-on, and handles VCC up to 50 V with IO(max) = 20 mA - used in microcontroller I/O buffering and LED driver enable stages.
For engineers reviewing the DDTC115EE-7 datasheet, DDTC115EE-7 pinout, DDTC115EE-7 application, or DDTC115EE-7 equivalent, key selection criteria include input resistor value (100 kΩ), guaranteed turn-on/off voltage thresholds, output saturation voltage under 1 mA load, thermal derating at elevated ambient temperatures, and compatibility with 3.3 V/5 V logic families.
Technical Context
This device integrates a single NPN transistor with two matched 100 kΩ bias resistors (R1 = R2) in series between base and emitter, forming a fixed-voltage-divider network that eliminates external bias components. Its internal topology enables direct TTL/CMOS-compatible switching without pull-up or base resistors.
It operates as a saturated switch with DC current gain (GI) ≥ 82 at VCE = 5 V and IC = 5 mA, and exhibits fT = 250 MHz (transistor-only), supporting fast edge transitions in digital control paths while maintaining low quiescent input current (IL = 0.15 mA at VI = 5 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| R1, R2 Nominal Value | 100 kΩ - sets precise input threshold and ensures consistent switching behavior across temperature |
| VI(on) | ≥ 3 V - guarantees reliable turn-on with standard 3.3 V logic high levels |
| VO(on) | ≤ 0.3 V at IO = 1 mA - ensures low-loss switching for signal routing or load enable |
| IO(max) | 20 mA - supports driving small-signal loads like LEDs, optocouplers, or gate inputs |
| PD | 150 mW - defines maximum continuous power dissipation on FR-4 PCB with minimum pad layout |
| fT | 250 MHz - indicates high-frequency capability of the bare transistor element for transient response |
| GI | ≥ 82 at VCE = 5 V, IC = 5 mA - confirms stable current amplification in saturated switching mode |
Pinout & Package
SOT523 surface-mount package: ultra-compact 1.6 mm × 1.6 mm footprint, 0.33 mm nominal height, matte tin-plated leads, moisture sensitivity level 1, UL 94V-0 rated molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Input reference node for bias network | Connected internally to R2; serves as common return for input signal and output load |
| 2 (Collector) | Switched output terminal | Drives external load to VCC; sinks up to 20 mA when saturated |
| 3 (Base) | Internal transistor control node | Connected between R1 and R2; not accessible externally - biasing fully internalized |
Key Features
| Feature | Design Value |
|---|---|
| Matched bias resistors | R1 = R2 = 100 kΩ ±30%, enabling predictable VI(on)/VI(off) thresholds without external tuning |
| Low input leakage | IL = 0.15 mA at VI = 5 V - minimizes MCU port loading and preserves drive strength |
| Guaranteed saturation | VO(on) ≤ 0.3 V at IO = 1 mA - ensures clean logic-low output for downstream CMOS inputs |
| Automotive-ready construction | Qualified per AEC-Q101, manufactured in IATF 16949 facilities - suitable for infotainment and body electronics |
| Green compliance | Halogen- and antimony-free (<900 ppm Br/Cl, <1000 ppm Sb), RoHS 3 compliant - meets global environmental mandates |
Applications
| Microcontroller I/O Buffering | LED Indicator Driver |
|---|---|
|
Use Scenario: Isolating and strengthening weak GPIO outputs from low-power MCUs (e.g., ARM Cortex-M0+) driving higher-current peripherals. IC Role / Device Role / Timing Role: Digital switch translating 3.3 V logic to 5 V rail-synchronized loads with sub-microsecond turn-on delay. Use Value: Eliminates need for discrete base resistor and reduces BOM count by one component per channel. |
Use Scenario: Driving status LEDs in portable medical devices where supply headroom is limited and current must be tightly controlled. IC Role / Device Role / Timing Role: Constant-current sink switch with defined saturation voltage, ensuring consistent LED brightness across battery voltage range. Use Value: Delivers 1 mA output at ≤0.3 V drop, minimizing power loss and heat generation in space-constrained enclosures. |
| Optocoupler Input Stage | Level Translation Interface |
|
Use Scenario: Providing isolated feedback signals from motor drivers or power supplies to MCU-based controllers via optocouplers. IC Role / Device Role / Timing Role: Low-leakage, high-gain switch interfacing between analog sensing circuitry and digital isolation barrier. Use Value: IO(off) ≤ 0.5 µA at VCC = 50 V prevents false triggering during high-voltage transients. |
Use Scenario: Converting 1.8 V logic outputs from FPGA I/O banks to 3.3 V compatible inputs on legacy ASICs or PMICs. IC Role / Device Role / Timing Role: Bidirectional voltage-level shifter configured as unidirectional active-low translator with defined VI(on) threshold. Use Value: VI(on) ≥ 3 V ensures robust noise margin against ground bounce and crosstalk in mixed-voltage systems. |
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 |
|---|---|---|---|
| DDTC124EE-7-F | R1 = R2 = 22 kΩ; higher input current (IL = 0.36 mA at VI = 5 V); lower VI(on) threshold (~1.9 V) | Better suited for 1.8 V logic interfaces but draws more MCU port current | Select when driving from low-voltage I/O with tighter VI(on) margin requirements |
| DDTC114EE-7-F | R1 = R2 = 10 kΩ; IL = 0.88 mA; VI(on) ≈ 1.9 V; IO(max) = 50 mA | Higher output current capability but reduced noise immunity due to lower input impedance | Choose for higher-load switching where 50 mA sink is required and MCU drive strength permits |
Compared with DDTC124EE-7-F and DDTC114EE-7-F, DDTC115EE-7 offers the highest input impedance and lowest IL, making it optimal for battery-powered microcontroller applications where port current budget and noise rejection are critical - at the expense of reduced output current capability.
Availability
DDTC115EE-7 is available at Aetrix Electronics and suitable for microcontroller I/O buffering, LED indicator driving, and optocoupler input staging requiring stable component supply, long-term lifecycle support, and automotive-grade reliability.
Supply support for DDTC115EE-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, automotive, and consumer markets.
This part belongs to the DDTC (R1 = R2 Series) pre-biased transistor family, engineered to simplify digital interface design by integrating matched bias resistors - targeting space-constrained, low-power logic translation and switching applications.
FAQ
What is the maximum collector-emitter voltage rating for DDTC115EE-7?
The absolute maximum VCC (pin 3 to pin 2) is 50 V. This rating applies across the full operating temperature range (–55 °C to +150 °C) and defines the upper limit for safe operation when the device is used as a switched load path. Exceeding this voltage risks junction breakdown and permanent damage.
Does DDTC115EE-7 require an external base resistor?
No. The device integrates two 100 kΩ bias resistors (R1 = R2) internally, connecting the base to both input (pin 1) and supply (pin 3). This eliminates the need for any external base resistor, reducing component count and PCB area in digital switching applications.
Is DDTC115EE-7 qualified for automotive use?
Yes - it is AEC-Q101 qualified and manufactured in IATF 16949 certified facilities. While the standard part is not PPAP-capable out-of-box, Diodes Incorporated supports automotive customers with change control, qualification documentation, and dedicated manufacturing lines upon request.
What is the thermal resistance (RθJA) of DDTC115EE-7 in its SOT523 package?
RθJA is 833 °C/W when mounted on an FR-4 PCB using the minimum recommended pad layout. This value reflects junction-to-ambient conduction under standardized test conditions and must be used with actual power dissipation (PD ≤ 150 mW) to calculate worst-case junction temperature rise.
DDTC115EE-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:
- -
DDTC115EE-7 FAQ
1.How can I place an order for DDTC115EE-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDTC115EE-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 DDTC115EE-7 reliable?
The price and inventory of DDTC115EE-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDTC115EE-7 is usually 5 days.
3.What payment methods are accepted for DDTC115EE-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTC115EE-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDTC115EE-7?
DDTC115EE-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDTC115EE-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 DDTC115EE-7?
For technical support, including DDTC115EE-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTC115EE-7 requirements.
6.How does Aetrix verify that DDTC115EE-7 is sourced from the original manufacturer or authorized distributors?
All DDTC115EE-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 DDTC115EE-7 meets industry standards.
7.What is the process for return or replacement of DDTC115EE-7?
All DDTC115EE-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDTC115EE-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 DDTC115EE-7 part is unused and in its original packaging.
Return procedure for DDTC115EE-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DDTC115EE-7 Tags
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MUN5211T1G
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