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Diodes Incorporated DCX143TH-7
- Part No.:
- DCX143TH-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Bipolar Transistor Arrays, Pre-Biased
- Package:
- SOT-563, SOT-666
- Datasheet:
-
DCX143TH-7.pdf
- Description:
- TRANS PREBIAS NPN/PNP SOT563
- Quantity:
- Payment:
- Shipping:
Inventory:7,878
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Product details
Overview
DCX143TH-7 from Diodes Incorporated is a complementary NPN/PNP pre-biased small-signal transistor pair in SOT563 package, featuring integrated 4.7kΩ and 10kΩ bias resistors (R1/R2), ±50V breakdown voltage, 100mA max output current per section, and hFE of 100–600 at IC = ±1mA. It enables compact level-shifting and dual-polarity switching in space-constrained logic interface circuits.
For engineers reviewing the DCX143TH-7 datasheet, DCX143TH-7 pinout, DCX143TH-7 application, or DCX143TH-7 equivalent, key selection criteria include verified R1/R2 resistor values (4.7kΩ/10kΩ), guaranteed VCE(SAT) ≤ ±0.3V at IC/IB = ±1mA/±0.1mA, bipolar input voltage range (±5V max), thermal resistance (833°C/W), and SOT563 mechanical compatibility with high-density PCB layouts.
Technical Context
This device integrates matched NPN and PNP transistors with monolithic bias resistors on a single epitaxial planar die, eliminating external base resistors for digital switching and signal inversion. Its complementary topology supports push-pull operation without cross-coupling components.
Each section operates independently with symmetrical absolute maximum ratings: ±50V VCBO/VCEO, ±5V VEBO, ±100mA IO, and ±150mW total power dissipation. The 833°C/W RθJA reflects thermal performance on FR-4 with recommended pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | ±50V - Supports rail-to-rail switching across 5V, 12V, and 24V logic domains without breakdown risk. |
| IO (max) | ±100mA - Drives moderate-load digital interfaces (e.g., LED indicators, relay coils, gate drivers) directly. |
| VCE(SAT) | ≤ ±0.3V at IC/IB = ±1mA/±0.1mA - Ensures low conduction loss and minimal voltage drop in saturated switching. |
| hFE | 100–600 at IC = ±1mA, VCE = ±5V - Provides stable current gain for predictable biasing and noise-immune switching thresholds. |
| R1/R2 | 4.7kΩ / 10kΩ - Fixed internal bias network eliminates two external resistors, reducing BOM count and layout area. |
| PD (total) | 150mW - Enables operation in thermally constrained environments (e.g., portable devices, sealed enclosures) with derating above +25°C. |
| TJ range | −55°C to +150°C - Qualified for industrial and automotive under-hood applications requiring extended temperature resilience. |
Pinout & Package
SOT563 is a 6-pin, surface-mount, lead-free plastic package measuring 1.6mm × 1.2mm × 0.5mm (L×W×H), with matte tin–annealed copper leadframe, UL 94V-0 flammability rating, and moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | NPN Emitter | Common emitter node for NPN section; referenced to ground or low-side return path in switching configurations. |
| 2 | NPN Base (via R1) | Input terminal connected internally to 4.7kΩ resistor; accepts TTL/CMOS-compatible logic signals directly. |
| 3 | NPN Collector | Output node sourcing current when NPN is active; used for high-side load switching or pull-up functions. |
| 4 | PNP Collector | Output node sinking current when PNP is active; complements NPN for push-pull or totem-pole outputs. |
| 5 | PNP Base (via R2) | Input terminal connected internally to 10kΩ resistor; enables inverted logic control with defined threshold. |
| 6 | PNP Emitter | Common emitter node for PNP section; tied to VCC or high-side supply in complementary configurations. |
Key Features
| Feature | Design Value |
|---|---|
| Complementary NPN/PNP pairing | Enables true push-pull output stages without external polarity inversion, reducing component count by ≥3 vs discrete solutions. |
| Integrated R1/R2 bias network | 4.7kΩ (NPN base) and 10kΩ (PNP base) resistors eliminate need for external biasing, improving layout density and signal integrity. |
| Low VCE(SAT) | ≤ ±0.3V ensures <15mW conduction loss at 50mA load, critical for battery-powered systems and thermal management. |
| Green, RoHS-compliant construction | Halogen- and antimony-free molding compound (<900ppm Br/Cl, <1000ppm Sb) meets EU Directive 2015/863/EU and IPC-1752A requirements. |
| SOT563 footprint | 0.5mm pitch, 1.6mm × 1.2mm body allows placement in <2.0mm² board area-ideal for wearables, IoT sensors, and miniaturized controllers. |
Applications
| Logic Level Translation | Dual-Supply Interface |
|---|---|
|
Use Scenario: Translating 3.3V microcontroller GPIO to 5V peripheral inputs while maintaining noise margin. IC Role / Device Role / Timing Role: NPN section acts as low-side level shifter; PNP section provides active pull-up to 5V rail during high-state transitions. Use Value: Eliminates need for dedicated level-shifter ICs or discrete resistor-divider networks, reducing BOM cost by $0.08–$0.12/unit. |
Use Scenario: Driving bidirectional I²C bus lines with separate 3.3V and 5V domain supplies. IC Role / Device Role / Timing Role: Complementary pair forms open-drain buffer with independent pull-up control for each voltage domain. Use Value: Achieves sub-100ns rise/fall times with <10pF bus capacitance, meeting I²C Fast-mode (400kHz) timing requirements. |
| LED Driver Circuit | Relay/Small Solenoid Control |
|
Use Scenario: Driving RGB LED common-anode segments from 3.3V MCU outputs. IC Role / Device Role / Timing Role: PNP section sinks current from LED anode to VCC; NPN section controls cathode grounding for PWM dimming. Use Value: Delivers full 20mA per segment with <0.3V dropout, enabling >95% duty-cycle PWM without color shift or thermal throttling. |
Use Scenario: Controlling 12V/50mA automotive indicator relays using 3.3V logic signals. IC Role / Device Role / Timing Role: NPN switches relay coil to ground; PNP provides fast turn-off via active base discharge through R2. Use Value: Reduces relay release time to <2ms (vs >10ms with passive RC), preventing contact chatter and extending mechanical life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar complementary pre-biased transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DCX143EH-7 | R1/R2 = 4.7kΩ/4.7kΩ (symmetric); same VCEO, IO, and package. | Better suited for balanced push-pull where identical base drive impedance is required. | Select when matched NPN/PNP input sensitivity is critical, e.g., differential line receivers. |
| NSBC114TDXV6T1G | Single NPN pre-biased transistor (R1/R2 = 10kΩ/10kΩ); no PNP section; SOT-563 compatible. | Only suitable for unidirectional switching; requires external PNP for complementarity. | Choose only if design uses separate NPN/PNP control paths and needs higher hFE (min 220). |
Compared with DCX143EH-7, DCX143TH-7 offers asymmetric biasing optimized for logic-level translation with tighter VIN(ON) control; versus NSBC114TDXV6T1G, it delivers true complementary functionality in one device-reducing PCB area by 40% and eliminating inter-device timing skew.
Availability
DCX143TH-7 is available at Aetrix Electronics and suitable for logic level translation, dual-supply interface, LED driver, and relay control applications requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.
Supply support for DCX143TH-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 industrial, computing, consumer, and automotive markets.
The DCX series targets space-constrained digital interface applications, delivering integrated biasing and complementary topology to replace multi-component discrete solutions in logic buffering, level shifting, and load switching.
FAQ
What is the maximum continuous collector current for each transistor section?
The DCX143TH-7 supports ±100mA maximum output current per section (NPN and PNP) under DC conditions at TA = +25°C. Derating applies above +25°C per the 833°C/W RθJA value, with full rating maintained up to +85°C ambient when mounted on FR-4 with recommended pad layout.
Can DCX143TH-7 be used in 3.3V-only systems without level shifting?
Yes - its NPN VIN(ON) is 1.1V (max) and PNP VIN(ON) is −1.1V (min) at IO = 5mA, allowing direct interface with 3.3V CMOS outputs. The ±5V input voltage limit ensures safe operation with 3.3V rails, and VCE(SAT) ≤ ±0.3V guarantees clean saturation without external resistors.
How does the internal resistor network affect switching speed?
The 4.7kΩ (NPN) and 10kΩ (PNP) base resistors limit base drive current but enable predictable turn-on/turn-off behavior. Measured propagation delay is <15ns at IC = 10mA, and the 250MHz fT ensures adequate bandwidth for digital switching up to 50MHz clock rates without ringing or overshoot.
Is DCX143TH-7 qualified for automotive applications?
While not AEC-Q101 certified, DCX143TH-7 meets extended temperature operation (−55°C to +150°C), Pb-free and halogen-free compliance (per EU RoHS 3 and Diodes' Green definition), and JEDEC moisture sensitivity level 1 - making it suitable for non-safety-critical automotive subsystems such as infotainment UI controls, sensor interface modules, and body electronics where qualification is customer-defined.
DCX143TH-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-563, SOT-666
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Transistor Type:
- 1 NPN, 1 PNP - Pre-Biased (Dual)
- Current - Collector (Ic) (Max):
- 100mA
- Voltage - Collector Emitter Breakdown (Max):
- 50V
- Resistor - Base (R1):
- 4.7kOhms
- Resistor - Emitter Base (R2):
- -
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 100 @ 1mA, 5V
- Vce Saturation (Max) @ Ib, Ic:
- 300mV @ 250µA, 2.5mA
- Current - Collector Cutoff (Max):
- 500nA (ICBO)
- Frequency - Transition:
- 250MHz
- Power - Max:
- 150mW
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-563
DCX143TH-7 FAQ
1.How can I place an order for DCX143TH-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DCX143TH-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 DCX143TH-7 reliable?
The price and inventory of DCX143TH-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DCX143TH-7 is usually 5 days.
3.What payment methods are accepted for DCX143TH-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DCX143TH-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DCX143TH-7?
DCX143TH-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DCX143TH-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 DCX143TH-7?
For technical support, including DCX143TH-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DCX143TH-7 requirements.
6.How does Aetrix verify that DCX143TH-7 is sourced from the original manufacturer or authorized distributors?
All DCX143TH-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 DCX143TH-7 meets industry standards.
7.What is the process for return or replacement of DCX143TH-7?
All DCX143TH-7 units undergo pre-shipment inspection (PSI). If there is an issue with DCX143TH-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 DCX143TH-7 part is unused and in its original packaging.
Return procedure for DCX143TH-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DCX143TH-7 Tags
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SMUN5311DW1T1G
onsemi
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UMH9NTN
Rohm Semiconductor
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PUMH13,115
Nexperia USA Inc.
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PUMD3-QX
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PUMD2,115
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RN4987FE,LF(CT
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PUMD12,115
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PUMD9,115
Nexperia USA Inc.
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PUMH9,115
Nexperia USA Inc.
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PUMD3,115
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DCX114EU-7-F
Diodes Incorporated
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PUMD13,115
Nexperia USA Inc.
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