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Diodes Incorporated DDTC115EKA-7-F
- Part No.:
- DDTC115EKA-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
DDTC115EKA-7-F.pdf
- Description:
- TRANS PREBIAS NPN 50V SC59-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,166
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Product details
Overview
DDTC115EKA-7-F from Diodes Incorporated is an NPN pre-biased small-signal transistor in SC-59 package with integrated R1 = R2 = 100 kΩ bias resistors, VCC = 50 V max, IO = 20 mA max, PD = 200 mW, and DC current gain (GL) of 82 at IC = 5 mA - used for level-shifting and digital switching in low-power logic interface circuits.
For engineers reviewing the DDTC115EKA-7-F datasheet, DDTC115EKA-7-F pinout, DDTC115EKA-7-F application, or DDTC115EKA-7-F equivalent, key selection criteria include input voltage threshold (VIN(on) = 1.9 V typ), output saturation voltage (VO(on) = 0.1 V typ), leakage current (IO(off) = 0.5 μA), resistor tolerance (±30%), and thermal resistance (RθJA = 625 °C/W).
Technical Context
This device integrates matched 100 kΩ base bias resistors (R1 = R2) to configure a single-transistor inverter with fixed biasing, eliminating external components for digital signal inversion or level translation. Its epitaxial planar construction ensures stable gain (GL = 82) and high fT = 250 MHz for moderate-speed switching.
The SC-59 package supports surface-mount assembly with moisture sensitivity Level 1 and UL 94V-0 flammability rating. Pin 1 is input (base via R1), Pin 2 is emitter (ground reference), and Pin 3 is collector output - enabling direct replacement of discrete BJT + two-resistor networks in space-constrained logic interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Max | 50 V - supports rail-to-rail operation up to 5 V logic with margin for transient spikes |
| IO Max | 20 mA - drives standard TTL/CMOS loads without external current amplification |
| R1 = R2 | 100 kΩ ±30% - sets predictable base bias for consistent turn-on at VIN ≥ 1.9 V |
| GL | 82 - provides sufficient current gain for low-drive GPIO interfacing |
| VO(on) | 0.1 V typ - ensures strong logic-low output compatible with 3.3 V and 5 V inputs |
| RθJA | 625 °C/W - requires minimal PCB copper area for thermal management in ambient ≤ 85 °C |
| fT | 250 MHz - enables reliable switching up to ~10–20 MHz digital signals |
Pinout & Package
Package: SC-59 - surface-mount, 3-pin plastic molded case (UL 94V-0), 0.008 g weight, moisture sensitivity Level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Input (Base via R1) | Accepts logic-level input; internal 100 kΩ resistor connects to base node |
| 2 | Emitter (Ground Reference) | Common return path; tied to system GND for inverting operation |
| 3 | Collector (Output) | Active-low output node; sinks up to 20 mA when saturated |
Key Features
| Feature | Design Value |
|---|---|
| Integrated R1 = R2 bias network | Eliminates two external resistors, reducing BOM count and layout area in logic interface designs |
| Matched resistor ratio (R2/R1 = 0.8–1.2) | Ensures stable bias point across temperature and process variation for repeatable switching thresholds |
| VIN(on) = 1.9 V typ at IO = 1 mA | Compatible with 3.3 V CMOS outputs without level-shifter circuitry |
| VO(on) = 0.1 V typ at IO = 5 mA | Guarantees robust logic-low assertion for downstream 1.8 V/3.3 V receivers |
| Lead-free / RoHS-compliant construction | Meets global environmental compliance requirements without sacrificing solderability or reliability |
Applications
| Industrial PLC I/O Modules | Automotive Body Control Units |
|---|---|
Use Scenario: Isolating and inverting microcontroller GPIO signals driving LED indicators or optocoupler inputs. IC Role / Device Role / Timing Role: Digital switch providing active-low output with built-in biasing for direct MCU interface. Use Value: Reduces component count by replacing BJT + two 100 kΩ resistors, improving board density and assembly yield. | Use Scenario: Translating 3.3 V CAN controller interrupt signals to 5 V-compatible wake-up inputs on power management ICs. IC Role / Device Role / Timing Role: Level-shifting inverter ensuring clean 5 V logic-low assertion during sleep-mode wake events. Use Value: VIN(on) = 1.9 V and VO(on) = 0.1 V guarantee timing-critical wake signal integrity without added propagation delay. |
| Consumer IoT Sensor Nodes | Medical Wearable Power Sequencing |
Use Scenario: Enabling/disabling low-power sensors (e.g., accelerometers) using MCU GPIO with minimal quiescent current. IC Role / Device Role / Timing Role: Load switch controlled by logic-high input, delivering active-low enable to sensor VEN pin. Use Value: IO(off) = 0.5 μA ensures sub-μA standby current, extending battery life in always-on sensing modes. | Use Scenario: Controlling power-up sequence of analog front-end ICs requiring precise enable timing relative to MCU reset release. IC Role / Device Role / Timing Role: Delayed-enable inverter synchronizing 3.3 V MCU reset deassertion to 5 V analog supply stabilization. Use Value: Fixed R1/R2 bias eliminates RC timing variability, ensuring repeatable enable timing across units and temperatures. |
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 |
|---|---|---|---|
| DDTC144EKA-7-F | R1 = R2 = 47 kΩ; higher IO = 100 mA; lower VIN(on) = 1.9 V but higher IL = 0.18 mA at VIN = 5 V | Better suited for higher-current loads (e.g., relay drivers); less ideal for ultra-low-power wake-up circuits | Select when driving >20 mA loads while retaining same SC-59 footprint and pinout |
| NSVD115EWT1G | Same R1 = R2 = 100 kΩ, but SOT-416 (SC-75) package; PD = 150 mW; RθJA = 700 °C/W | Smaller footprint but reduced power handling and thermal performance; not drop-in due to different pad layout | Choose only if board space is critical and thermal derating is acceptable |
Compared with DDTC144EKA-7-F and NSVD115EWT1G, DDTC115EKA-7-F uniquely balances ultra-low input current (IL = 0.15 mA), tight resistor matching, and SC-59 manufacturability - making it optimal for battery-sensitive, space-constrained logic inversion where 20 mA drive suffices.
Availability
DDTC115EKA-7-F is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, and consumer IoT sensor nodes requiring stable component supply and long-term production continuity.
Supply support for DDTC115EKA-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, cost-optimized components for industrial, computing, and automotive markets.
This part belongs to the DDTC R1 = R2 series of pre-biased transistors, designed specifically to replace discrete BJT + dual-resistor configurations in digital logic interface and level-shifting applications.
FAQ
What is the maximum continuous collector current for DDTC115EKA-7-F?
The maximum continuous output current (IO) is 20 mA at TA = 25 °C, derated linearly above 25 °C per the 625 °C/W thermal resistance. At 85 °C ambient, usable IO drops to approximately 12 mA to maintain junction temperature below 150 °C.
Can DDTC115EKA-7-F be used as a direct replacement for a discrete 2N3904 with two 100 kΩ resistors?
Yes - Pin 1 connects to input (replacing base resistor node), Pin 2 is emitter (GND), and Pin 3 is collector output. The internal R1 = R2 = 100 kΩ network replicates the discrete configuration, with identical DC transfer characteristics and improved layout consistency.
Is the SC-59 package of DDTC115EKA-7-F compatible with standard SMT reflow profiles?
Yes - it is qualified for lead-free reflow per J-STD-020C Level 1 moisture sensitivity, with matte tin-plated copper leadframe. Recommended peak temperature is 260 °C, and the UL 94V-0 molding compound withstands standard Pb-free thermal cycles without delamination.
Does DDTC115EKA-7-F support 1.8 V logic input levels?
No - its VIN(on) is specified at 1.9 V (typ) with 3 V (max), meaning reliable turn-on requires ≥2.0 V input. For 1.8 V systems, consider DDTC123EKA-7-F (VIN(on) = 1.1 V typ) or add a pull-up resistor to raise effective threshold.
DDTC115EKA-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-59-3
DDTC115EKA-7-F FAQ
1.How can I place an order for DDTC115EKA-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for DDTC115EKA-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 DDTC115EKA-7-F reliable?
The price and inventory of DDTC115EKA-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 DDTC115EKA-7-F is usually 5 days.
3.What payment methods are accepted for DDTC115EKA-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTC115EKA-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDTC115EKA-7-F?
DDTC115EKA-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDTC115EKA-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 DDTC115EKA-7-F?
For technical support, including DDTC115EKA-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTC115EKA-7-F requirements.
6.How does Aetrix verify that DDTC115EKA-7-F is sourced from the original manufacturer or authorized distributors?
All DDTC115EKA-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 DDTC115EKA-7-F meets industry standards.
7.What is the process for return or replacement of DDTC115EKA-7-F?
All DDTC115EKA-7-F units undergo pre-shipment inspection (PSI). If there is an issue with DDTC115EKA-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 DDTC115EKA-7-F part is unused and in its original packaging.
Return procedure for DDTC115EKA-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DDTC115EKA-7-F Tags
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