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Diodes Incorporated DDTC124XCA-7
- Part No.:
- DDTC124XCA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- -
- Datasheet:
-
DDTC124XCA-7.pdf
- Description:
- TRANS PREBIAS NPN 200MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:119
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Product details
Overview
DDTC124XCA-7 from Diodes Incorporated is an NPN pre-biased small-signal transistor in SOT23 package, featuring integrated bias resistors R1 = 22 kΩ and R2 = 47 kΩ (R1 ≠ R2), VI(OFF) = 0.4 V, IO = 50 mA max, and AEC-Q101 qualification for automotive signal switching applications.
For engineers reviewing the DDTC124XCA-7 datasheet, DDTC124XCA-7 pinout, DDTC124XCA-7 application, or DDTC124XCA-7 equivalent, this part serves as a space- and BOM-optimized digital switch with defined input threshold, low saturation voltage, and automotive-grade reliability in compact surface-mount form.
Technical Context
This device integrates an NPN transistor with two non-matching on-chip bias resistors (R1 = 22 kΩ, R2 = 47 kΩ), enabling direct logic-level interface without external base resistors. It operates as a single-gate inverter with GND-referenced input and open-collector–like output behavior.
Designed for 5 V and 3.3 V logic systems, it delivers guaranteed turn-on at VI(ON) = 1.4 V (IO = 2 mA), VCE(SAT) ≤ 0.3 V at IC/IB = 10, and DC current gain (GL) = 68 at VCE = 5 V, IC = 5 mA - supporting robust noise margin and low-loss switching in digital control paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| R1 Resistor | 22 kΩ ±30% - sets input current limit and logic-high threshold level |
| R2 Resistor | 47 kΩ ±30% - provides active pull-down to ensure reliable turn-off and noise immunity |
| VI(OFF) | 0.4 V max - guarantees cutoff below standard TTL/CMOS logic-low thresholds |
| VI(ON) | 1.4 V @ IO = 2 mA - ensures clean turn-on with 3.3 V and 5 V microcontroller GPIOs |
| VCE(SAT) | ≤0.3 V @ IC/IB = 10 - minimizes power loss and heating in load-switching configurations |
| GL (DC Current Gain) | 68 @ VCE = 5 V, IC = 5 mA - enables predictable drive capability without external gain staging |
| PD | 200 mW - supports continuous operation at ambient up to +125°C on FR4 PCB with minimal heatsinking |
Pinout & Package
Package: SOT23 - surface-mount plastic case, 0.008 g weight, UL 94V-0 rated, moisture sensitivity Level 1, matte tin-plated leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Input reference node / GND return | Internally tied to R2; serves as common ground reference for bias network and output load return path |
| 2 (Base) | Internal transistor base connection | Not accessible externally; connected internally to R1–R2 junction and transistor base |
| 3 (Collector) | Switched output terminal | Open-collector–style output; sinks up to 50 mA when driven high at Pin 1, pulls low via internal NPN |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive temperature range (−55°C to +150°C) and mechanical stress requirements |
| R1 ≠ R2 resistor topology | Enables precise input hysteresis and stable logic-level interpretation without external components |
| Green, halogen- and antimony-free | Meets <900 ppm Br, <900 ppm Cl, <1000 ppm Sb - compliant with global environmental directives |
| SOT23 footprint compatibility | Direct drop-in replacement for discrete BJT + two-resistor designs, reducing PCB area by >40% |
| PPAP-capable supply chain | Supports automotive production traceability with controlled manufacturing, test, and documentation |
Applications
| Automotive Door Module Control | Industrial PLC Input Conditioning |
|---|---|
|
Use Scenario: Level-shifting and debouncing signals from mechanical door latch switches before MCU sampling. IC Role / Device Role / Timing Role: Digital input buffer with built-in pull-down and noise filtering via R1/R2 ratio. Use Value: Eliminates need for external RC network and discrete transistor, reducing BOM count and layout complexity in space-constrained modules. |
Use Scenario: Converting 24 V industrial sensor outputs to 3.3 V logic-compatible levels for FPGA or ARM-based controllers. IC Role / Device Role / Timing Role: High-impedance input stage with programmable threshold and fast turn-on (<100 ns typical propagation). Use Value: Enables direct interfacing without voltage dividers or level translators while maintaining noise immunity across wide temperature ranges. |
| Consumer Appliance Motor Driver Enable | Medical Diagnostic Equipment LED Indicators |
|
Use Scenario: Enabling/disabling low-side gate drivers for BLDC motor control stages using MCU GPIOs. IC Role / Device Role / Timing Role: Low-saturation load switch with guaranteed IO = 50 mA sink capability and thermal derating support. Use Value: Provides safe, repeatable turn-on/turn-off of driver ICs with minimal voltage drop and no risk of base overdrive. |
Use Scenario: Driving status LEDs in battery-powered diagnostic handhelds where leakage and quiescent current must be minimized. IC Role / Device Role / Timing Role: Ultra-low IO(OFF) = 0.5 μA off-state current and precise VI(OFF) = 0.4 V threshold. Use Value: Extends battery life by preventing false activation during sleep mode while ensuring full brightness at nominal drive current. |
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 |
|---|---|---|---|
| DDTC123YCA-7-F | R1 = 2.2 kΩ, R2 = 10 kΩ; higher input current (3.8 mA @ 5 V), lower VI(ON) = 3.0 V | Better suited for 5 V-only systems requiring stronger drive; less compatible with 3.3 V logic | Select when higher base current tolerance and faster switching at 5 V are prioritized over low-voltage compatibility |
| DDTC114WCA-7-F | R1 = 10 kΩ, R2 = 4.7 kΩ; VI(ON) = 1.3 V @ IO = 1 mA; GL = 24 | Lower gain and earlier turn-on enable use with weak-drive MCUs but reduce noise margin | Prefer for ultra-low-power 3.3 V systems where minimal input current is critical and load current ≤10 mA |
Compared with DDTC124XCA-7, DDTC123YCA-7-F offers higher drive strength at 5 V but sacrifices 3.3 V compatibility, while DDTC114WCA-7-F improves low-voltage sensitivity at the cost of gain and output current capability - making DDTC124XCA-7 the balanced choice for mixed-voltage automotive and industrial control nodes.
Availability
DDTC124XCA-7 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O modules, and consumer appliance motor control requiring stable component supply, AEC-Q101 compliance, and long-term production continuity.
Supply support for DDTC124XCA-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 automotive, industrial, and computing markets.
This part belongs to the DDTC (R1≠R2 Series) CA family - engineered specifically for simplified digital signal interfacing in harsh-environment applications where board space, BOM count, and qualification rigor are critical design constraints.
FAQ
What is the maximum continuous output current rating for DDTC124XCA-7?
The DDTC124XCA-7 is rated for a maximum output current (IO) of 50 mA under specified conditions (VCC ≤ 50 V, TA = +25°C). Derating applies above +25°C per the 625°C/W thermal resistance; at +85°C ambient, usable IO reduces to approximately 32 mA to maintain safe junction temperature.
Can DDTC124XCA-7 be used with 3.3 V microcontrollers?
Yes - its VI(ON) is specified at 1.4 V (IO = 2 mA), well within the VOH/VOL margins of standard 3.3 V CMOS outputs. With R1 = 22 kΩ and R2 = 47 kΩ, it draws only 0.88 mA at 3.3 V input, ensuring reliable turn-on without overloading GPIO pins.
Is the SOT23 package lead-free and RoHS-compliant?
Yes - DDTC124XCA-7 is fully lead-free and RoHS 2 compliant (2011/65/EU), with matte tin-plated leads meeting MIL-STD-202 solderability requirements. It is also halogen- and antimony-free ("Green"), containing <900 ppm bromine, <900 ppm chlorine, and <1000 ppm antimony compounds.
How does the R1 ≠ R2 configuration improve noise immunity compared to R1 = R2 types?
The asymmetric R1 (22 kΩ) and R2 (47 kΩ) values create intentional input hysteresis: VI(ON) (1.4 V) is significantly higher than VI(OFF) (0.4 V), widening the noise margin by ~1.0 V. This prevents false triggering from EMI or slow-rising edges in automotive and industrial environments.
DDTC124XCA-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:
- -
DDTC124XCA-7 FAQ
1.How can I place an order for DDTC124XCA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDTC124XCA-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 DDTC124XCA-7 reliable?
The price and inventory of DDTC124XCA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDTC124XCA-7 is usually 5 days.
3.What payment methods are accepted for DDTC124XCA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTC124XCA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDTC124XCA-7?
DDTC124XCA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDTC124XCA-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 DDTC124XCA-7?
For technical support, including DDTC124XCA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTC124XCA-7 requirements.
6.How does Aetrix verify that DDTC124XCA-7 is sourced from the original manufacturer or authorized distributors?
All DDTC124XCA-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 DDTC124XCA-7 meets industry standards.
7.What is the process for return or replacement of DDTC124XCA-7?
All DDTC124XCA-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDTC124XCA-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 DDTC124XCA-7 part is unused and in its original packaging.
Return procedure for DDTC124XCA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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