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Diodes Incorporated DDTC115ECA-7-F
- Part No.:
- DDTC115ECA-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
DDTC115ECA-7-F.pdf
- Description:
- TRANS PREBIAS NPN 50V SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:10,495
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Product details
Overview
DDTC115ECA-7-F from Diodes Incorporated is an NPN pre-biased small-signal transistor in SOT23 package with integrated bias resistors R1 = R2 = 100 kΩ, rated for 50 V VCC, 20 mA IO, and 200 mW power dissipation. It operates across –55°C to +150°C and is AEC-Q101 qualified for automotive signal switching applications such as LED driver control and logic-level translation.
For engineers reviewing the DDTC115ECA-7-F datasheet, DDTC115ECA-7-F pinout, DDTC115ECA-7-F application, or DDTC115ECA-7-F equivalent, key selection criteria include input resistor tolerance (±30%), VI(OFF) (0.5–1.1 V), VO(ON) (≤0.3 V), DC current gain (min 82), and thermal resistance (625 °C/W) under FR4 mounting conditions.
Technical Context
This device integrates matched 100 kΩ base bias resistors (R1 = R2) to simplify NPN transistor switching in digital interface circuits. Its internal configuration replaces discrete resistor-transistor combinations, reducing board space and component count while maintaining predictable turn-on/turn-off thresholds.
Designed for high-reliability automotive use, it meets AEC-Q101 stress testing requirements and supports operation up to +150°C junction temperature. The SOT23 package enables surface-mount assembly with moisture sensitivity level 1 and matte tin-plated leads compliant with MIL-STD-202 Method 208.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Max | 50 V - Supports rail-to-rail switching in 3.3 V and 5 V logic systems without breakdown risk |
| IO Max | 20 mA - Suitable for driving low-current loads like indicator LEDs or gate inputs of MOSFETs |
| R1 = R2 | 100 kΩ ±30% - Enables stable biasing with known current division ratio for consistent switching threshold |
| VO(ON) | ≤0.3 V at IO/IL = 5 mA/0.25 mA - Ensures low saturation voltage for minimal power loss in active-switch mode |
| hFE Min | 82 at VCE = 5 V, IC = 5 mA - Guarantees sufficient current amplification for reliable digital output drive |
| PD | 200 mW - Limits thermal rise on standard FR4 PCB with minimum pad layout per Diodes' recommendation |
| RθJA | 625 °C/W - Defines maximum allowable ambient temperature rise for safe continuous operation at rated load |
Pinout & Package
SOT23 plastic surface-mount package with matte tin-plated leads, UL 94V-0 flammability rating, and 0.008 g weight. Moisture sensitivity level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Emitter terminal | Reference node for current sink path; connected internally to R2 and external load return |
| 2 (Base) | Input node | Common connection point between R1 and R2; accepts logic-level input signal |
| 3 (Collector) | Output node | Switched output terminal delivering controlled current to load when biased via pin 2 |
Key Features
| Feature | Design Value |
|---|---|
| Integrated R1 = R2 bias network | Eliminates need for two external resistors, reducing BOM count and layout area by ~30% vs discrete solution |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JEDEC standards |
| Green compound packaging | Halogen- and antimony-free molding compound (<900 ppm Br, <900 ppm Cl, <1000 ppm Sb) meeting RoHS 3 compliance |
| Low VO(ON) | Ensures ≤0.3 V collector-emitter saturation voltage at 5 mA output, minimizing conduction loss in always-on logic interfaces |
Applications
| Automotive Interior Lighting Control | Industrial PLC Input Conditioning |
|---|---|
Use Scenario: Driving individual LED strings in dashboard backlighting where microcontroller GPIOs require current-limited, logic-compatible switching. IC Role / Device Role / Timing Role: NPN pre-biased switch translating 3.3 V MCU output to 12 V LED supply path with defined current limit. Use Value: Eliminates external base resistors and ensures consistent turn-on threshold across temperature (-40°C to +105°C ambient). |
Use Scenario: Converting 24 V industrial sensor signals to 5 V logic levels compatible with FPGA or microcontroller inputs. IC Role / Device Role / Timing Role: Level-shifting interface with built-in pull-down to prevent floating inputs during sensor disconnect. Use Value: Reduces external component count by two resistors per channel and maintains noise immunity via fixed bias ratio. |
| Consumer Appliance Panel Indicators | Medical Diagnostic Equipment Status Outputs |
Use Scenario: Controlling status LEDs on washing machine control boards where space and long-term reliability are critical. IC Role / Device Role / Timing Role: Low-power indicator driver with guaranteed VI(OFF) < 1.1 V to avoid false triggering from leakage currents. Use Value: Enables direct connection to 3.3 V microcontroller outputs without additional logic-level translators. |
Use Scenario: Isolating microcontroller outputs from relay drivers in portable diagnostic devices requiring low standby current. IC Role / Device Role / Timing Role: High-impedance input stage with 100 kΩ bias network ensuring <0.5 μA off-state leakage at 50 V VCC. Use Value: Meets IEC 60601-1 leakage current limits for patient-connected equipment under fault conditions. |
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 |
|---|---|---|---|
| DDTC144ECA-7-F | R1 = R2 = 47 kΩ; higher IO (30 mA); lower VI(OFF) (0.5–1.1 V same) | Better suited for 24 V logic interfaces requiring faster switching and higher drive capability | Select when output current >20 mA is needed and board layout allows same SOT23 footprint |
| DDTC124ECA-7-F | R1 = R2 = 22 kΩ; IO = 30 mA; VI(OFF) = 0.5–1.1 V; hFE min = 56 | Offers improved DC gain margin for marginal drive conditions but less input impedance than DDTC115ECA-7-F | Prefer for noisy environments where higher base current improves noise immunity at expense of higher input loading |
Compared with DDTC144ECA-7-F and DDTC124ECA-7-F, DDTC115ECA-7-F provides highest input impedance (100 kΩ), lowest off-state leakage (<0.5 μA), and best suitability for ultra-low-power 3.3 V logic interfacing-making it optimal for battery-powered or thermally constrained designs.
Availability
DDTC115ECA-7-F is available at Aetrix Electronics and suitable for automotive interior lighting control, industrial PLC input conditioning, and consumer appliance panel indicators requiring stable component supply and AEC-Q101 compliance.
Supply support for DDTC115ECA-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, with design, manufacturing, and sales operations across Asia, Europe, and North America.
This part belongs to the DDTC (R1 = R2 Series) CA family of pre-biased transistors engineered specifically for simplified digital interface design in automotive, industrial, and consumer applications where reliability and board-space reduction are critical.
FAQ
What is the maximum operating temperature for DDTC115ECA-7-F?
The device supports continuous operation from –55°C to +150°C junction temperature. When mounted on FR4 with minimum recommended pad layout, its thermal resistance is 625 °C/W, limiting ambient temperature to approximately +100°C at full 20 mA load and 200 mW dissipation.
Is DDTC115ECA-7-F pin-compatible with other SOT23 pre-biased transistors?
Yes-it uses standard SOT23 pinout (Emitter-Base-Collector on pins 1-2-3) and matches mechanical dimensions per JEDEC TO-236AB. However, electrical characteristics differ significantly across R1/R2 values; substitution requires verification of bias network compatibility and output current requirements.
Does DDTC115ECA-7-F require external decoupling capacitors?
No external decoupling is required for basic switching operation. Its integrated bias network stabilizes DC operating point, and the 250 MHz fT ensures adequate bandwidth for digital signal frequencies up to 10 MHz without added capacitance.
How does the ±30% resistor tolerance affect circuit performance?
The ±30% tolerance on R1 and R2 impacts input threshold consistency: VI(OFF) shifts from 0.5 V to 1.1 V across lot variation. Designers must ensure system-level noise margins exceed this range-especially in high-EMI environments like automotive engine bays or industrial motor drives.
DDTC115ECA-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:
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
DDTC115ECA-7-F FAQ
1.How can I place an order for DDTC115ECA-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for DDTC115ECA-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 DDTC115ECA-7-F reliable?
The price and inventory of DDTC115ECA-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 DDTC115ECA-7-F is usually 5 days.
3.What payment methods are accepted for DDTC115ECA-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTC115ECA-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDTC115ECA-7-F?
DDTC115ECA-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDTC115ECA-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 DDTC115ECA-7-F?
For technical support, including DDTC115ECA-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTC115ECA-7-F requirements.
6.How does Aetrix verify that DDTC115ECA-7-F is sourced from the original manufacturer or authorized distributors?
All DDTC115ECA-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 DDTC115ECA-7-F meets industry standards.
7.What is the process for return or replacement of DDTC115ECA-7-F?
All DDTC115ECA-7-F units undergo pre-shipment inspection (PSI). If there is an issue with DDTC115ECA-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 DDTC115ECA-7-F part is unused and in its original packaging.
Return procedure for DDTC115ECA-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DDTC115ECA-7-F Tags
-
MUN5211T1G
onsemi
-
DTC043ZEBTL
Rohm Semiconductor
-
DTC114EKAT146
Rohm Semiconductor
-
DDTD113ZC-7-F
Diodes Incorporated
-
DRDNB16W-7
Diodes Incorporated
-
PDTC114ET,215
Nexperia USA Inc.
-
PDTC143ZT,215
Nexperia USA Inc.
-
PDTC143ET,215
Nexperia USA Inc.
-
PDTC143XT,215
Nexperia USA Inc.
-
MMUN2211LT1G
onsemi
-
PDTC144ET,215
Nexperia USA Inc.
-
PDTC124ET,215
Nexperia USA Inc.
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