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Diodes Incorporated DDTC115EUAQ-7-F
- Part No.:
- DDTC115EUAQ-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- SC-70, SOT-323
- Datasheet:
-
DDTC115EUAQ-7-F.pdf
- Description:
- TRANS PREBIAS NPN 50V SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:7,769
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Product details
Overview
DDTC115EUAQ-7-F from Diodes Incorporated is an NPN pre-biased small-signal transistor in SOT323 package, featuring integrated bias resistors R1 = R2 = 100 kΩ, VIN(ON) = 1.4–3.0 V (at IO = 2 mA), VO(ON) ≤ 0.3 V, and DC current gain (hFE) ≥ 82 at IC = 5 mA, VCE = 5 V. It is AEC-Q101 qualified and used in automotive-level logic interface and level-shifting circuits.
For engineers reviewing the DDTC115EUAQ-7-F datasheet, DDTC115EUAQ-7-F pinout, DDTC115EUAQ-7-F application, or DDTC115EUAQ-7-F equivalent, this page delivers verified electrical parameters, terminal roles, automotive-grade reliability context, and direct substitution guidance for discrete logic-level switching designs.
Technical Context
This device integrates two matched 100 kΩ bias resistors (R1 = R2) to configure a single-NPN inverter with fixed base biasing-eliminating external components for digital input conditioning. Its VIN(OFF) ≤ 1.1 V ensures reliable turn-off under low-noise logic thresholds.
The SOT323 package supports high-density PCB layouts with thermal resistance RθJA = 625 °C/W on FR-4, and its AEC-Q101 qualification confirms operation across –55 °C to +150 °C ambient, meeting automotive signal interface requirements without derating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| R1, R2 Nominal Value | 100 kΩ - sets fixed base bias ratio for predictable saturation at low input drive currents |
| VIN(ON) | 1.4–3.0 V - defines minimum valid high-level input voltage to reliably saturate transistor with IO = 2 mA |
| VO(ON) | ≤ 0.3 V - guarantees low saturated output voltage for clean TTL/CMOS-compatible low-state signaling |
| IO(MAX) | 20 mA - maximum continuous output current, limiting load drive capability for LED indicators or gate inputs |
| hFE (DC Current Gain) | ≥ 82 at IC = 5 mA, VCE = 5 V - ensures sufficient current amplification for stable switching with minimal base drive |
| PD | 200 mW - power dissipation limit on standard FR-4 board, constraining sustained duty-cycle in driving applications |
| TJ Range | –55 °C to +150 °C - full automotive temperature range compliance per AEC-Q101, no derating required |
Pinout & Package
Package: SOT323 - ultra-small surface-mount plastic package (2.15 × 2.10 × 0.95 mm), moisture sensitivity level 1, matte tin-plated leads, UL 94V-0 rated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Emitter terminal | Reference node for input/output voltage referencing; connected to GND in inverter configuration |
| 2 (Base) | Base connection point | Internally tied to R1–R2 junction; accepts logic input signal directly without external resistor network |
| 3 (Collector) | Output collector | Delivers inverted, current-sinking output; drives loads referenced to VCC |
Key Features
| Feature | Design Value |
|---|---|
| Integrated R1 = R2 bias network | 100 kΩ ±30% - eliminates two external resistors, reducing BOM count and layout area in logic interface stages |
| AEC-Q101 qualification | Qualified for automotive applications - validated for temperature cycling, HTRB, ESD, and mechanical stress per AEC standard |
| Green compound packaging | Halogen- and antimony-free (<900 ppm Br/Cl, <1000 ppm Sb) - meets global environmental compliance mandates without performance trade-offs |
| SOT323 footprint compatibility | Standardized 3-pin lead pitch (0.65 mm) - enables drop-in replacement in space-constrained PCBs designed for similar pre-biased transistors |
Applications
| Automotive Door Module Interface | Industrial PLC Input Conditioning |
|---|---|
|
Use Scenario: Converting 12 V vehicle bus signals to 3.3 V microcontroller GPIO inputs in door control units. IC Role / Device Role / Timing Role: Level-shifting inverter with built-in biasing, providing noise-immune logic translation. Use Value: Eliminates external resistor divider and Schmitt trigger, reducing component count while maintaining AEC-Q101 reliability. |
Use Scenario: Isolating 24 V field sensor outputs before feeding into programmable logic controller (PLC) digital inputs. IC Role / Device Role / Timing Role: Digital input buffer with defined VIN(ON)/VIN(OFF) thresholds for robust noise rejection. Use Value: Ensures consistent switching behavior across wide industrial temperature ranges without recalibration. |
| Consumer Appliance Control Panel | Medical Diagnostic Equipment Status Indication |
|
Use Scenario: Driving LED status indicators from low-voltage MCU pins in washing machine control boards. IC Role / Device Role / Timing Role: Current-sinking switch enabling direct MCU-to-LED connection without series resistor. Use Value: Reduces bill-of-materials by integrating biasing, while maintaining 20 mA drive capability for visible LED brightness. |
Use Scenario: Interfacing isolated sensor alerts to internal monitoring microcontrollers in portable diagnostic devices. IC Role / Device Role / Timing Role: Signal inversion and voltage translation between isolated domains with guaranteed low VO(ON). Use Value: Supports safe, low-power logic-level handshaking in battery-operated medical systems with strict leakage limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar pre-biased NPN transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DDTC115EUA-7-F | No AEC-Q101 marking; same electrical specs and package | Not certified for automotive production; suitable for industrial/commercial use only | Select when AEC-Q101 documentation and PPAP support are not required |
| NSVD115EWT1G | R1 = R2 = 100 kΩ, but VIN(ON) min = 1.0 V; hFE ≥ 68 at same test condition | Lower gain and wider VIN(ON) tolerance may reduce noise margin in marginal logic interfaces | Choose if cost sensitivity outweighs need for highest gain and tightest threshold control |
Compared with DDTC115EUA-7-F and NSVD115EWT1G, DDTC115EUAQ-7-F provides certified automotive reliability and the highest guaranteed hFE, making it optimal for safety-critical signal conditioning where long-term parametric stability is essential.
Availability
DDTC115EUAQ-7-F is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input modules, and medical diagnostic equipment requiring stable component supply and AEC-Q101 traceability.
Supply support for DDTC115EUAQ-7-F 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 automotive, industrial, and consumer markets.
This part belongs to the DDTC R1=R2 pre-biased transistor family, engineered specifically for simplified digital interface design in space- and reliability-constrained applications such as automotive body control and industrial sensing.
FAQ
What is the function of Pin 2 on DDTC115EUAQ-7-F?
Pin 2 is the base terminal, internally connected to the junction of the two 100 kΩ bias resistors (R1 and R2). It serves as the input node for logic-level signals-no external base resistor is needed, enabling direct connection to MCU GPIO or sensor outputs.
Is DDTC115EUAQ-7-F pin-compatible with DDTA115EUAQ-7-F?
No-DDTC115EUAQ-7-F is NPN, while DDTA115EUAQ-7-F is its complementary PNP counterpart. They share identical SOT323 pinout (Emitter–Base–Collector), but polarity reversal means they cannot substitute directly without circuit redesign.
Does this device require external pull-up or pull-down resistors?
No-its integrated R1=R2 network provides self-biasing. When used as an inverter, Pin 1 (Emitter) connects to GND, Pin 3 (Collector) pulls up to VCC via load, and Pin 2 accepts input directly-no external resistors are needed for basic switching operation.
What is the maximum operating voltage between Collector and Emitter?
The absolute maximum VCEO is 50 V, as specified in the Absolute Maximum Ratings table. This rating applies continuously at TA = +25 °C; derating is not required up to +150 °C ambient due to AEC-Q101 thermal validation.
DDTC115EUAQ-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- NPN - Pre-Biased
- Current - Collector (Ic) (Max):
- 100 mA
- Voltage - Collector Emitter Breakdown (Max):
- 50 V
- Resistor - Base (R1):
- 100 kOhms
- Resistor - Emitter Base (R2):
- 100 kOhms
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 82 @ 5mA, 5V
- Vce Saturation (Max) @ Ib, Ic:
- 300mV @ 250µA, 5mA
- Current - Collector Cutoff (Max):
- 500nA
- Frequency - Transition:
- 250 MHz
- Power - Max:
- 200 mW
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
DDTC115EUAQ-7-F FAQ
1.How can I place an order for DDTC115EUAQ-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for DDTC115EUAQ-7-F 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 DDTC115EUAQ-7-F reliable?
The price and inventory of DDTC115EUAQ-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDTC115EUAQ-7-F is usually 5 days.
3.What payment methods are accepted for DDTC115EUAQ-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTC115EUAQ-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDTC115EUAQ-7-F?
DDTC115EUAQ-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDTC115EUAQ-7-F 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 DDTC115EUAQ-7-F?
For technical support, including DDTC115EUAQ-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTC115EUAQ-7-F requirements.
6.How does Aetrix verify that DDTC115EUAQ-7-F is sourced from the original manufacturer or authorized distributors?
All DDTC115EUAQ-7-F 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 DDTC115EUAQ-7-F meets industry standards.
7.What is the process for return or replacement of DDTC115EUAQ-7-F?
All DDTC115EUAQ-7-F units undergo pre-shipment inspection (PSI). If there is an issue with DDTC115EUAQ-7-F, 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 DDTC115EUAQ-7-F part is unused and in its original packaging.
Return procedure for DDTC115EUAQ-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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