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Diodes Incorporated DDTC122TE-7
- Part No.:
- DDTC122TE-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- SOT-523
- Datasheet:
-
DDTC122TE-7.pdf
- Description:
- TRANS PREBIAS NPN 150MW SOT523
- Quantity:
- Payment:
- Shipping:
Inventory:4,559
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Product details
Overview
DDTC122TE-7 from Diodes Incorporated is an NPN pre-biased transistor in SOT523 package with integrated 0.22kΩ base resistor (R1) and open-emitter configuration (R2 = OPEN), rated for 50V VCBO, 40V VCEO, and 5V VEBO, delivering hFE of 100–600 at IC = 1mA, used in automotive signal switching and logic-level interface circuits.
For engineers reviewing the DDTC122TE-7 datasheet, DDTC122TE-7 pinout, DDTC122TE-7 application, or DDTC122TE-7 equivalent, key selection criteria include its AEC-Q101 qualification, R1-only bias topology, 150mW power dissipation, SOT523 thermal performance, and compatibility with 3.3V/5V digital control inputs in space-constrained PCB layouts.
Technical Context
This device implements a single NPN transistor with monolithically integrated base resistor (R1 = 0.22kΩ) and no emitter resistor (R2 = OPEN), enabling direct digital input drive without external bias components. It operates as a saturated switch with VCE(SAT) ≤ 0.3V at IC = 5mA/IB = 0.25mA and supports DC current gain up to 600 under standard test conditions.
The SOT523 package provides low thermal resistance (RθJA = 625°C/W on FR-4), enabling stable operation from –55°C to +150°C. Its AEC-Q101 qualification confirms suitability for automotive-grade reliability requirements including temperature cycling, humidity testing, and mechanical shock endurance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCBO | 50 V - Maximum collector-base voltage before breakdown; defines safe operating range in high-side switch configurations |
| VCEO | 40 V - Maximum collector-emitter voltage with base open; sets upper limit for load supply rail compatibility |
| VEBO | 5 V - Maximum emitter-base reverse voltage; constrains use in bidirectional or level-shifted bias networks |
| hFE | 100–600 - DC current gain range at IC = 1mA/VCE = 5V; determines required base drive current for target collector load |
| PD | 150 mW - Maximum power dissipation at TA = 25°C; limits continuous switching duty cycle in thermally unenhanced layouts |
| RθJA | 625 °C/W - Junction-to-ambient thermal resistance on standard FR-4; informs derating curve usage above 25°C ambient |
| fT | 200 MHz - Gain-bandwidth product; indicates usable frequency limit for small-signal amplification or fast switching |
Pinout & Package
Package: SOT523 - ultra-small surface-mount plastic package (1.60 × 1.60 × 0.75 mm), UL 94V-0 rated, moisture sensitivity level 1, matte tin terminals solderable per MIL-STD-202.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Emitter terminal | Open connection (no internal R2); must be externally tied to GND or load return path |
| 2 (Base) | Base terminal | Connected internally to R1 (0.22kΩ); accepts TTL/CMOS logic-level input directly |
| 3 (Collector) | Collector terminal | Main output node; sinks load current when driven; connects to positive supply via load |
Key Features
| Feature | Design Value |
|---|---|
| Integrated R1 bias resistor | 0.22kΩ enables direct 3.3V/5V microcontroller GPIO drive without external components |
| AEC-Q101 qualification | Validated for automotive applications including engine control modules and body electronics |
| SOT523 footprint | 1.6mm × 1.6mm area saves >60% board space vs. SOT23 in high-density routing |
| Halogen- and antimony-free | Meets <900ppm Br, <900ppm Cl, <1000ppm Sb; compliant with global environmental regulations |
Applications
| Automotive Door Module Switching | Industrial PLC Input Buffer |
|---|---|
Use Scenario: Controlling window lift motor enable signals in vehicle door modules using 3.3V MCU outputs. IC Role / Device Role / Timing Role: NPN pre-biased switch translating logic-level enable to 12V load control path. Use Value: Eliminates need for discrete base resistor and reduces BOM count by one component per channel. | Use Scenario: Isolating 24V field sensor inputs from 5V PLC controller logic rails. IC Role / Device Role / Timing Role: Level-shifting interface transistor with defined saturation behavior for reliable digital input detection. Use Value: Ensures consistent VCE(SAT) ≤ 0.3V across temperature, improving noise margin in noisy industrial environments. |
| Consumer Appliance Power Sequencing | Medical Diagnostic Equipment Signal Conditioning |
Use Scenario: Enabling sequential power-up of subsystems (e.g., display backlight, sensor array) in smart home appliances. IC Role / Device Role / Timing Role: Low-power enable switch activated by microcontroller GPIO during boot sequence. Use Value: Supports 100mA max output current while maintaining <0.3V drop, minimizing voltage loss in sequencing paths. | Use Scenario: Driving LED indicators and optocoupler inputs in Class II medical diagnostic devices requiring low leakage. IC Role / Device Role / Timing Role: Precision-switching element with IEO ≤ 0.5µA at VEB = 4V for low standby current design. Use Value: Meets stringent IEC 60601-1 leakage current limits without additional filtering components. |
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 |
|---|---|---|---|
| DDTC122TK-7-F | R1 = 0.22kΩ, R2 = 47kΩ - adds emitter pull-down resistor for enhanced turn-off speed | Preferred where fast deactivation is critical (e.g., PWM-driven loads) | Select when circuit requires guaranteed active-low reset behavior or reduced storage time |
| NSV12231LT1G | Same R1/R2 values but in SC-70 package; higher RθJA (700°C/W) and lower PD (200mW) | Used in legacy designs with SC-70 land patterns; not drop-in compatible with SOT523 | Choose only if redesigning for SC-70 footprint or sourcing constraints require ON Semi part |
Compared with DDTC122TE-7, DDTC122TK-7-F improves turn-off response via R2, while NSV12231LT1G offers identical biasing but different thermal and mechanical characteristics - both require layout verification before substitution.
Availability
DDTC122TE-7 is available at Aetrix Electronics and suitable for automotive door modules, industrial PLC input buffers, and consumer appliance power sequencing requiring stable component supply and long-term lifecycle support.
Supply support for DDTC122TE-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 components for automotive, industrial, and computing markets.
The DDTC series targets cost-sensitive, space-constrained digital switching applications where integrated bias resistors reduce component count and improve assembly yield in high-volume manufacturing.
FAQ
Is DDTC122TE-7 still in active production?
No - DDTC122TE-7 is marked obsolete in Diodes' official documentation (DS30404 Rev. 8-4, June 2021). Aetrix Electronics maintains limited legacy stock and supports last-time buy programs with full traceability and extended warranty for qualified industrial and automotive customers.
What is the function of the "OPEN" R2 designation in DDTC122TE-7?
The "OPEN" R2 means no internal emitter resistor is present - the emitter terminal is directly connected to the die without any built-in pull-down. This configuration allows maximum flexibility in external bias network design, such as connecting emitter to ground, load, or feedback nodes depending on circuit topology.
Can DDTC122TE-7 replace a standard 2N3904 with external base resistor?
Yes - DDTC122TE-7 replaces a 2N3904 plus 0.22kΩ base resistor in saturated switching applications. Its integrated R1 simplifies layout and ensures consistent biasing, though design verification is required for timing-critical or linear-mode uses due to fixed resistor tolerance and junction capacitance differences.
Does DDTC122TE-7 support 1.8V logic-level drive?
No - the device's VI(ON) threshold is specified at 2.0V (typical) with IO = 20mA, and minimum input voltage for reliable turn-on is not characterized below 2.0V. For 1.8V systems, verify actual switching behavior with prototype testing or select a logic-level optimized alternative like DDTA114YU-7-F.
DDTC122TE-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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):
- -
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 100 @ 1mA, 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
DDTC122TE-7 FAQ
1.How can I place an order for DDTC122TE-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DDTC122TE-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 DDTC122TE-7 reliable?
The price and inventory of DDTC122TE-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDTC122TE-7 is usually 5 days.
3.What payment methods are accepted for DDTC122TE-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTC122TE-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDTC122TE-7?
DDTC122TE-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDTC122TE-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 DDTC122TE-7?
For technical support, including DDTC122TE-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTC122TE-7 requirements.
6.How does Aetrix verify that DDTC122TE-7 is sourced from the original manufacturer or authorized distributors?
All DDTC122TE-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 DDTC122TE-7 meets industry standards.
7.What is the process for return or replacement of DDTC122TE-7?
All DDTC122TE-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDTC122TE-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 DDTC122TE-7 part is unused and in its original packaging.
Return procedure for DDTC122TE-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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