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Diodes Incorporated DDTA115TKA-7-F
- Part No.:
- DDTA115TKA-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
DDTA115TKA-7-F.pdf
- Description:
- TRANS PREBIAS PNP 50V SC59-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,114
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Product details
Overview
DDTA115TKA-7-F from Diodes Incorporated is a PNP pre-biased small-signal transistor with single built-in bias resistor (R1 = 100 kΩ), SC-59 package, −50 V VCEO, −100 mA IC, and hFE of 100–600, used in discrete logic-level switching and level-shifting circuits in portable power management.
For engineers reviewing the DDTA115TKA-7-F datasheet, DDTA115TKA-7-F pinout, DDTA115TKA-7-F application, or DDTA115TKA-7-F equivalent, key selection factors include verified R1-only bias topology, guaranteed VCE(sat) ≤ −0.3 V at IC/IB = −0.5 mA/−0.05 mA, SC-59 thermal resistance (625 °C/W), and RoHS-compliant green molding compound.
Technical Context
This device implements a monolithic PNP bipolar junction transistor with an integrated 100 kΩ base-emitter pull-up resistor (R1 only, no R2), eliminating external bias components in high-impedance drive applications. It operates within −55 °C to +150 °C and supports DC switching up to 250 MHz fT.
The SC-59 package enables surface-mount assembly on FR4 PCBs with standardized pad layout per AP02001. Its −0.3 V VCE(sat) at low drive current (−0.05 mA base) ensures efficient operation in battery-powered logic interfaces where base drive current must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | −50 V - Supports rail-to-rail switching in 3.3 V and 5 V systems with margin against transients. |
| IC (max) | −100 mA - Sufficient for driving LEDs, small relays, or MOSFET gates in low-power control paths. |
| R1 | 100 kΩ ±30% - Enables direct microcontroller GPIO interface without external pull-up; reduces BOM count. |
| VCE(sat) | ≤ −0.3 V at IC/IB = −0.5 mA/−0.05 mA - Minimizes conduction loss in always-on or duty-cycled loads. |
| hFE | 100–600 at IC = −1 mA, VCE = −5 V - Ensures stable gain across temperature for predictable switching thresholds. |
| fT | 250 MHz - Validates suitability for high-speed digital signal conditioning up to ~10–20 MHz edge rates. |
| PD | 200 mW - Matches thermal limits of SC-59 on standard FR4; derates linearly above 25 °C ambient. |
Pinout & Package
Package: SC-59 - Surface-mount plastic case (UL 94V-0), 0.008 g weight, moisture sensitivity Level 1, lead-free matte tin plating over copper leadframe.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | E | Current sink node; connects to system ground or low-side return path in active-low switch configurations. |
| 2 (Base) | B | Internal connection to R1 top node; accepts logic-level input (e.g., MCU GPIO); no external bias required. |
| 3 (Collector) | C | Switched output node; connects to load (e.g., LED anode or PMOS gate) referenced to positive rail. |
Key Features
| Feature | Design Value |
|---|---|
| Single integrated bias resistor (R1 only) | Eliminates need for external base resistor in high-impedance drive scenarios, reducing PCB area and assembly steps. |
| SC-59 package with 625 °C/W RθJA | Enables thermal reliability on standard FR4 layouts without heatsinking for ≤100 mW continuous dissipation. |
| −0.3 V VCE(sat) at ultra-low IB = −0.05 mA | Permits direct interfacing with 1.8 V/3.3 V logic outputs while maintaining low saturation loss. |
| RoHS-compliant & "Green" molding compound | Meets global environmental compliance requirements; halogen-free and antimony-free for industrial and consumer use. |
| −55 °C to +150 °C operating range | Validated for under-hood automotive modules, industrial sensors, and extended-temperature IoT edge nodes. |
Applications
| LED Indicator Driver | Microcontroller GPIO Expander |
|---|---|
|
Use Scenario: Driving status LEDs from low-current MCU pins in space-constrained wearables. IC Role / Device Role: Discrete PNP switch replacing discrete BJT + resistor combo. Use Value: Reduces component count by one per channel and maintains <10 µA standby leakage due to R1-only topology. |
Use Scenario: Adding active-low enable outputs to resource-limited 8-bit MCUs with limited GPIO. IC Role / Device Role: Level-shifting buffer for 1.8 V logic controlling 5 V peripherals. Use Value: Achieves reliable turn-on with 0.05 mA base drive, avoiding weak pull-up limitations of native GPIO. |
| Power Rail Sequencing | Industrial Sensor Interface |
|
Use Scenario: Enabling auxiliary power rails only after main supply stabilizes in multi-rail systems. IC Role / Device Role: Delayed-enable switch controlled by supervisor IC open-drain output. Use Value: Leverages −5 V VEBO rating to tolerate reverse-biased conditions during sequencing faults. |
Use Scenario: Isolating analog sensor outputs from noisy digital domains in factory automation nodes. IC Role / Device Role: Digital isolator front-end stage converting logic signals to optocoupler LED drive. Use Value: Delivers consistent −0.3 V VCE(sat) across temperature, ensuring stable LED forward current. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP pre-biased transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DDTA115TCA-7-F | Same die, but SC-70 package (smaller footprint, higher RθJA = 700 °C/W). | Preferred where board area is critical and power dissipation remains <150 mW. | Select when minimizing PCB real estate outweighs thermal margin needs. |
| NSV11501MT1G | PNP pre-biased with R1 = 100 kΩ, but SOT-23 package and VCEO = −40 V. | Suitable for ≤3.3 V systems only; not rated for 5 V rail switching with margin. | Choose only if operating voltage stays below 4 V and legacy SOT-23 footprint is required. |
Compared with DDTA115TKA-7-F, the DDTA115TCA-7-F trades thermal robustness for size reduction, while the NSV11501MT1G sacrifices voltage margin for broader SOT-23 compatibility-neither offers identical VCEO/RθJA balance.
Availability
DDTA115TKA-7-F is available at Aetrix Electronics and suitable for LED indicator drivers, microcontroller GPIO expanders, and power rail sequencing requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for DDTA115TKA-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, headquartered in Plano, Texas, serving industrial, computing, consumer, and communications markets since 1966.
This part belongs to the DDTA R1-Only Series, designed specifically to reduce component count in logic-level switching applications by integrating a single precision bias resistor into standard PNP transistor die.
FAQ
What is the function of the internal R1 resistor in DDTA115TKA-7-F?
The internal 100 kΩ resistor connects between base and emitter (R1 only), providing automatic biasing so the transistor turns on when the collector is pulled low and the base is left floating or driven high. This eliminates the need for an external pull-up resistor in active-low switching configurations, simplifying circuit design and reducing bill-of-materials count.
Can DDTA115TKA-7-F replace a standard PNP BJT like BC807 in existing designs?
No-DDTA115TKA-7-F is not a drop-in replacement for standard PNPs such as BC807 because its base terminal is internally connected to R1. Using it without adjusting the drive network may cause incorrect biasing or failure to saturate. It requires redesign to leverage its R1-only architecture, typically by removing the external base resistor and reconfiguring the control signal polarity.
Is DDTA115TKA-7-F suitable for analog amplification?
No-it is optimized for digital switching, not linear amplification. Its hFE variation across IC and temperature, combined with fixed R1 biasing, prevents stable small-signal gain control. The datasheet specifies only switching parameters (VCE(sat), hFE at fixed points), and no linearity, noise, or distortion data is provided.
What does the "-7-F" suffix indicate in the part number?
The "-7-F" denotes tape-and-reel packaging: "7" indicates 3000 units per reel, and "F" signifies lead-free, RoHS-compliant finish. This matches Diodes Incorporated's standard ordering code for SC-59 devices shipped in moisture-barrier bags with J-STD-020C Level 1 handling requirements.
DDTA115TKA-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:
- PNP - Pre-Biased
- Current - Collector (Ic) (Max):
- 100 mA
- Voltage - Collector Emitter Breakdown (Max):
- 50 V
- Resistor - Base (R1):
- 100 kOhms
- Resistor - Emitter Base (R2):
- -
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 100 @ 1mA, 5V
- Vce Saturation (Max) @ Ib, Ic:
- 300mV @ 100µA, 1mA
- Current - Collector Cutoff (Max):
- 500nA (ICBO)
- Frequency - Transition:
- 250 MHz
- Power - Max:
- 200 mW
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-59-3
DDTA115TKA-7-F FAQ
1.How can I place an order for DDTA115TKA-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for DDTA115TKA-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 DDTA115TKA-7-F reliable?
The price and inventory of DDTA115TKA-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 DDTA115TKA-7-F is usually 5 days.
3.What payment methods are accepted for DDTA115TKA-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTA115TKA-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDTA115TKA-7-F?
DDTA115TKA-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDTA115TKA-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 DDTA115TKA-7-F?
For technical support, including DDTA115TKA-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTA115TKA-7-F requirements.
6.How does Aetrix verify that DDTA115TKA-7-F is sourced from the original manufacturer or authorized distributors?
All DDTA115TKA-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 DDTA115TKA-7-F meets industry standards.
7.What is the process for return or replacement of DDTA115TKA-7-F?
All DDTA115TKA-7-F units undergo pre-shipment inspection (PSI). If there is an issue with DDTA115TKA-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 DDTA115TKA-7-F part is unused and in its original packaging.
Return procedure for DDTA115TKA-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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