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Diodes Incorporated DDTC123JUA-7-F
- Part No.:
- DDTC123JUA-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single, Pre-Biased Bipolar Transistors
- Package:
- SC-70, SOT-323
- Datasheet:
-
DDTC123JUA-7-F.pdf
- Description:
- TRANS PREBIAS NPN 50V SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:4,870
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Product details
Overview
DDTC123JUA-7-F from Diodes Incorporated is a 50V NPN pre-biased transistor in SOT323 package, featuring integrated R1 = 2.2kΩ and R2 = 47kΩ bias resistors. It delivers 100mA max output current, 80 DC current gain (hFE) at 5V VCE, and 0.1–0.3V saturation voltage under 5mA IC/0.25mA IIN. It is used for level-shifting and low-power switching in USB port protection circuits.
For engineers reviewing the DDTC123JUA-7-F datasheet, DDTC123JUA-7-F pinout, DDTC123JUA-7-F application, or DDTC123JUA-7-F equivalent, this page provides verified electrical parameters, terminal roles, real-world use cases, and validated alternatives - all derived from Diodes' official DS30322 Rev. 11-2 specification.
Technical Context
This device integrates an NPN transistor with two discrete on-die biasing resistors (R1 = 2.2kΩ, R2 = 47kΩ) to eliminate external base drive components. Its input voltage threshold is 0.5V (off) and 1.1V (on), enabling direct interface with 1.8V/3.3V logic without level translators.
The 250MHz fT, 625°C/W θJA, and 200mW power dissipation support high-speed digital switching in space-constrained PCB layouts. Its SOT323 footprint ensures compatibility with automated pick-and-place and reflow processes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | 50V - Maximum collector-emitter voltage before breakdown; supports rail-to-rail operation in 24V industrial I/O stages. |
| IC(max) | 100mA - Continuous collector current rating; sufficient for driving LED indicators or small-signal relays. |
| hFE | 80 (min) at VCE = 5V, IC = 10mA - Stable current amplification enables predictable switching with minimal base drive overhead. |
| VCE(sat) | 0.1–0.3V at IC/IB = 5mA/0.25mA - Low saturation voltage minimizes conduction loss in always-on bias networks. |
| fT | 250MHz - Gain-bandwidth product confirms suitability for <10MHz digital signal routing and pulse-width modulation control paths. |
| PD | 200mW - Power dissipation limit at TA = 25°C; requires thermal pad layout per Diodes' SOT323 recommendation for sustained 100mA operation. |
Pinout & Package
Package: SOT323 - ultra-small surface-mount plastic package (2.15mm × 2.10mm × 0.95mm), moisture sensitivity level 1, matte tin-plated leads, UL 94V-0 rated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Emitter) | Transistor emitter terminal | Connected internally to ground reference; serves as common return path for bias and load current. |
| 2 (Base) | Input node tied to R1–R2 junction | Accepts logic-level input; internal resistor divider sets turn-on threshold at 1.1V for 5mA IC. |
| 3 (Collector) | Transistor collector terminal | Drives external load; rated for 50V standoff and 100mA continuous current. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated R1/R2 bias network | R1 = 2.2kΩ, R2 = 47kΩ - eliminates 2 external resistors, reducing BOM count and PCB area in GPIO-driven switches. |
| Low VCE(sat) | 0.1–0.3V - reduces power loss in always-on bias chains and improves efficiency in battery-powered sensor nodes. |
| AEC-Q101 qualified option available | Manufactured in IATF 16949 facilities - supports automotive body electronics where PPAP documentation and change control are mandatory. |
| Green, halogen-free construction | <900ppm Br/Cl, <1000ppm Sb - meets IPC-1752A material declaration requirements for RoHS 3 and ELV compliance. |
Applications
| USB Port Protection | IoT Sensor Node Enable Control |
|---|---|
Use Scenario: Isolating VBUS during hot-plug detection to prevent backfeed into host controller. IC Role / Device Role: NPN switch controlling power path to USB transceiver IC. Use Value: 1.1V VIN(on) allows direct interface with 1.8V microcontroller GPIO; 100mA rating handles full USB 2.0 pull-up current. |
Use Scenario: Enabling/disabling supply to MEMS accelerometer during sleep/wake cycles. IC Role / Device Role: Low-leakage enable switch for 3.3V sensor rail. Use Value: 0.5μA IC(off) at 50V VCC ensures sub-1μA system standby current; SOT323 footprint saves space on compact PCBs. |
| Industrial PLC Input Conditioning | Automotive Interior Lighting Dimming |
Use Scenario: Converting 24V field signals to 3.3V logic levels for microcontroller input capture. IC Role / Device Role: Level-shifting buffer with built-in pull-down. Use Value: 50V VCEO withstands industrial transients; R1/R2 ratio provides stable 1.1V threshold independent of supply variation. |
Use Scenario: PWM-controlled current sink for RGB LED backlighting in instrument clusters. IC Role / Device Role: High-speed switching element in constant-current dimming path. Use Value: 250MHz fT supports clean 10kHz PWM edges; 0.3V VCE(sat) limits heat rise at 50mA LED current. |
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 |
|---|---|---|---|
| DDTC123YUA-7-F | R1 = 2.2kΩ, R2 = 10kΩ; VIN(on) = 3.0V @ 20mA IC | Higher input threshold suits 3.3V logic but not 1.8V systems | Select when interfacing with 3.3V MCU GPIOs requiring higher noise immunity. |
| DDA0010000 | Same SOT323 package; R1 = 2.2kΩ, R2 = 47kΩ; VIN(on) = 1.0V @ 5mA IC; hFE = 60 min | Slightly lower gain and earlier turn-on; identical bias ratio | Choose for cost-sensitive consumer designs where 60 hFE suffices and 1.0V threshold improves margin in noisy environments. |
Compared with DDTC123YUA-7-F, DDTC123JUA-7-F enables lower-voltage logic interfaces and tighter threshold control; versus DDA0010000, it offers +33% higher hFE for improved drive capability in marginal bias conditions.
Availability
DDTC123JUA-7-F is available at Aetrix Electronics and suitable for USB port protection, IoT sensor node enable control, and industrial PLC input conditioning requiring stable component supply across production lifecycles.
Supply support for DDTC123JUA-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) UA family of pre-biased transistors, engineered specifically for eliminating external bias resistors in logic-level switching and level translation applications across consumer, industrial, and automotive markets.
FAQ
What is the maximum operating temperature for DDTC123JUA-7-F?
The device operates reliably from –55°C to +150°C ambient temperature. Its 150°C maximum junction temperature is achievable only with proper PCB thermal relief per Diodes' recommended SOT323 pad layout (C = 0.65mm, G = 1.30mm). Derating begins above +25°C at 0.32mW/°C.
Can DDTC123JUA-7-F replace a standard NPN transistor with external bias resistors?
Yes - it replaces a discrete NPN transistor plus two base resistors (2.2kΩ from base to input, 47kΩ from base to emitter). The internal resistors are laser-trimmed to ±30% tolerance on R1 and ±20% on R2/R1 ratio, ensuring consistent turn-on behavior without manual calibration.
Is DDTC123JUA-7-F compliant with automotive qualification standards?
The base part is not AEC-Q101 qualified, but Diodes offers an automotive-grade variant (DDTC123JUAQ-7-F) manufactured in IATF 16949-certified facilities, PPAP-capable, and qualified to AEC-Q101. This version includes extended temperature screening and change control documentation.
How does the input voltage threshold vary with temperature?
VIN(on) decreases by approximately –1.2mV/°C across –55°C to +125°C, based on DS30322 Figure 6. At +125°C, the 1.1V (25°C) threshold drops to ~0.9V, maintaining reliable turn-on with 1.8V logic even under worst-case thermal stress.
DDTC123JUA-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- 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):
- 2.2 kOhms
- Resistor - Emitter Base (R2):
- 47 kOhms
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 80 @ 10mA, 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-323
DDTC123JUA-7-F FAQ
1.How can I place an order for DDTC123JUA-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for DDTC123JUA-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 DDTC123JUA-7-F reliable?
The price and inventory of DDTC123JUA-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 DDTC123JUA-7-F is usually 5 days.
3.What payment methods are accepted for DDTC123JUA-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDTC123JUA-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DDTC123JUA-7-F?
DDTC123JUA-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DDTC123JUA-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 DDTC123JUA-7-F?
For technical support, including DDTC123JUA-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDTC123JUA-7-F requirements.
6.How does Aetrix verify that DDTC123JUA-7-F is sourced from the original manufacturer or authorized distributors?
All DDTC123JUA-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 DDTC123JUA-7-F meets industry standards.
7.What is the process for return or replacement of DDTC123JUA-7-F?
All DDTC123JUA-7-F units undergo pre-shipment inspection (PSI). If there is an issue with DDTC123JUA-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 DDTC123JUA-7-F part is unused and in its original packaging.
Return procedure for DDTC123JUA-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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