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Diodes Incorporated DDTC122LE-7
- Part No.:
- DDTC122LE-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- SOT-523
- Datasheet:
-
DDTC122LE-7.pdf
- Description:
- TRANS PREBIAS NPN 150MW SOT523
- Quantity:
- Payment:
- Shipping:
Inventory:752
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Product details
Overview
DDTC122LE-7 from Diodes Incorporated is an NPN pre-biased transistor in SOT523 package, featuring integrated 0.22kΩ and 10kΩ bias resistors, 50V VCEO, 100mA IC, and AEC-Q101 qualification for automotive signal switching applications such as LED driver control and microcontroller I/O interfacing.
For engineers reviewing the DDTC122LE-7 datasheet, DDTC122LE-7 pinout, DDTC122LE-7 application, or DDTC122LE-7 equivalent, key selection criteria include input threshold voltage (VI(OFF) = 0.3V), output saturation voltage (VCE(SAT) ≤ 0.3V at 5mA/0.25mA), DC current gain (GL = 56), thermal resistance (RθJA = 625°C/W), and RoHS-compliant green packaging.
Technical Context
This device integrates two on-die resistors (R1 = 0.22kΩ, R2 = 10kΩ) to configure base biasing for digital switching, eliminating external components. It operates with VCC up to 50V and supports input voltages from –5V to +6V, enabling robust level-shifting in 3.3V/5V mixed-signal systems.
The transistor delivers guaranteed DC current gain (GL = 56 min) at IO = 10mA and VO = 5V, with fT = 200MHz typical for moderate-speed switching. Its SOT523 footprint supports high-density PCB layouts while maintaining AEC-Q101 reliability for under-hood automotive modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 40V - Maximum collector-emitter voltage before breakdown; sets safe operating range for 12V/24V automotive supply rails. |
| IC (max) | 100mA - Continuous collector current limit; suitable for driving LEDs, small relays, or logic-level MOSFET gates. |
| R1 / R2 | 0.22kΩ / 10kΩ - Integrated bias network enables direct TTL/CMOS interface without external resistors. |
| VI(OFF) | 0.3V - Input turn-off threshold; ensures reliable cutoff with noise margins in noisy automotive environments. |
| VCE(SAT) | ≤0.3V @ 5mA/0.25mA - Low saturation voltage minimizes power loss and heat generation in switching mode. |
| RθJA | 625°C/W - Thermal resistance on FR-4 board; defines derating curve for ambient temperatures up to +150°C. |
Pinout & Package
Package: SOT523 - ultra-small surface-mount plastic case (1.60 × 1.60 × 0.75 mm), UL 94V-0 rated, moisture sensitivity level 1, matte tin terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Emitter terminal | Reference node for bias network; connects to ground or low-side return path. |
| 2 (Base) | Input node | Internal connection point between R1 and R2; accepts digital control signal directly. |
| 3 (Collector) | Output node | Switched high-side output; drives load connected between VCC and collector. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bias resistors | Eliminates need for two external resistors, reducing BOM count and PCB area in space-constrained modules. |
| AEC-Q101 qualification | Validated for automotive-grade temperature cycling, humidity, and mechanical stress per JESD22 standards. |
| Green "halogen & antimony free" construction | Meets <900ppm Br, <900ppm Cl, <1000ppm Sb; compliant with EU Directive 2015/863/EU (RoHS 3). |
| SOT523 footprint | 0.002g weight and 1.6mm × 1.6mm body enable use in compact infotainment and ADAS sensor modules. |
Applications
| Automotive LED Tail Light Control | Industrial PLC Digital Output Stage |
|---|---|
Use Scenario: Switching 12V LED strings in rear lighting modules with PWM dimming. IC Role / Device Role / Timing Role: NPN pre-biased switch providing low-loss, fast-turnoff current path controlled by MCU GPIO. Use Value: VCE(SAT) ≤ 0.3V reduces thermal load on PCB; AEC-Q101 rating ensures operation across –40°C to +125°C ambient. | Use Scenario: Driving 24V solenoid valves in factory automation I/O cards. IC Role / Device Role / Timing Role: Level-shifting interface between 3.3V FPGA outputs and industrial 24V loads. Use Value: R1/R2 network tolerates ±5V input transients; 40V VCEO provides margin against inductive kickback. |
| Consumer Appliance Motor Driver Enable | Medical Infusion Pump Signal Isolation |
Use Scenario: Enabling brushed DC motor drivers in smart washing machines. IC Role / Device Role / Timing Role: High-side enable switch activated by microcontroller during spin cycles. Use Value: GL = 56 ensures stable drive at 50mA load; SOT523 allows dense placement near motor driver ICs. | Use Scenario: Isolating microcontroller outputs from stepper motor control signals in portable infusion pumps. IC Role / Device Role / Timing Role: Digital buffer stage preventing backfeed into sensitive analog subsystems. Use Value: VI(OFF) = 0.3V guarantees clean off-state; RoHS 3 compliance meets medical device material restrictions. |
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 |
|---|---|---|---|
| DDTC142JE-7 | R1 = 0.47kΩ (vs. 0.22kΩ); identical R2 = 10kΩ, VCEO, and AEC-Q101 rating. | Higher input resistance yields lower base current draw; better for battery-powered MCU I/O. | Select when optimizing for reduced input loading at same VI(ON) threshold. |
| NSV12231T1G | Same SOT-523 package; R1 = 22kΩ, R2 = 220kΩ; VCEO = 50V; no AEC-Q101 certification. | Designed for general-purpose consumer electronics; lacks automotive qualification and tighter VI(OFF) spec. | Use only in non-automotive, cost-sensitive designs where AEC-Q101 is not required. |
Compared with DDTC142JE-7 and NSV12231T1G, DDTC122LE-7 offers the lowest R1 value for fastest turn-on in high-speed switching, retains full AEC-Q101 compliance, and delivers the tightest VI(OFF) specification-critical for noise-immune automotive signal routing.
Availability
DDTC122LE-7 is available at Aetrix Electronics and suitable for automotive lighting control, industrial PLC output stages, and medical device signal buffering requiring stable component supply and long-term lifecycle support.
Supply support for DDTC122LE-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, headquartered in Plano, Texas, serving automotive, industrial, computing, and consumer markets with high-reliability components.
The DDTC series targets automotive and industrial signal-switching applications, delivering pre-biased transistors with integrated resistors, AEC-Q101 qualification, and green packaging to simplify design-in and meet stringent environmental requirements.
FAQ
Is DDTC122LE-7 still in active production?
No-DDTC122LE-7 is officially obsolete per Diodes' DS30404 Rev. 8-4 (June 2021). Aetrix Electronics maintains limited legacy stock and supports last-time-buy programs with full traceability and documentation for ongoing production continuity.
What is the function of Pin 2 in the SOT523 package?
Pin 2 is the internal base node, connected between the 0.22kΩ (R1) and 10kΩ (R2) bias resistors. It serves as the input terminal for digital control signals and must not be externally shorted or loaded beyond datasheet-specified input current limits (≤28mA at 5V).
Can DDTC122LE-7 replace a standard NPN transistor like BC847?
No-DDTC122LE-7 is not a drop-in replacement for discrete NPN transistors. Its integrated bias network fixes base drive characteristics; using it without accounting for R1/R2 will cause incorrect switching thresholds or excessive base current. External resistor removal is mandatory if substituting.
Does DDTC122LE-7 support PWM frequencies above 10kHz?
Yes-its 200MHz fT and low VCE(SAT) support clean switching at PWM frequencies up to 50kHz in LED dimming applications. Layout-dependent parasitic inductance and trace capacitance remain the limiting factors-not the device itself.
DDTC122LE-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-523
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- Transistor Type:
- NPN - Pre-Biased
- Current - Collector (Ic) (Max):
- 100 mA
- Voltage - Collector Emitter Breakdown (Max):
- 50 V
- Resistor - Base (R1):
- 220 Ohms
- Resistor - Emitter Base (R2):
- 10 kOhms
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 56 @ 10mA, 5V
- Vce Saturation (Max) @ Ib, Ic:
- 300mV @ 250µA, 5mA
- Current - Collector Cutoff (Max):
- 500nA
- Frequency - Transition:
- 200 MHz
- Power - Max:
- 150 mW
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-523
DDTC122LE-7 FAQ
1.How can I place an order for DDTC122LE-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDTC122LE-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 DDTC122LE-7 reliable?
The price and inventory of DDTC122LE-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDTC122LE-7 is usually 5 days.
3.What payment methods are accepted for DDTC122LE-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTC122LE-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDTC122LE-7?
DDTC122LE-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDTC122LE-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 DDTC122LE-7?
For technical support, including DDTC122LE-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTC122LE-7 requirements.
6.How does Aetrix verify that DDTC122LE-7 is sourced from the original manufacturer or authorized distributors?
All DDTC122LE-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 DDTC122LE-7 meets industry standards.
7.What is the process for return or replacement of DDTC122LE-7?
All DDTC122LE-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDTC122LE-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 DDTC122LE-7 part is unused and in its original packaging.
Return procedure for DDTC122LE-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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