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Diodes Incorporated DCX144EH-7
- Part No.:
- DCX144EH-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Bipolar Transistor Arrays, Pre-Biased
- Package:
- SOT-563, SOT-666
- Datasheet:
-
DCX144EH-7.pdf
- Description:
- TRANS PREBIAS NPN/PNP SOT563
- Quantity:
- Payment:
- Shipping:
Inventory:3,878
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Product details
Overview
DCX144EH-7 from Diodes Incorporated is a complementary NPN/PNP pre-biased small-signal transistor pair in SOT563 package, featuring built-in 47 kΩ R1 and 47 kΩ R2 bias resistors. It delivers ±30 mA output current, 150 mW total power dissipation, and operates across –55°C to +150°C. Used for level-shifting and digital logic interfacing in compact DC-DC feedback and microcontroller I/O expansion circuits.
For engineers reviewing the DCX144EH-7 datasheet, DCX144EH-7 pinout, DCX144EH-7 application, or DCX144EH-7 equivalent, key selection criteria include input voltage thresholds (±1.9 V), output saturation voltage (±0.1 V), DC current gain (68 typ), and dual-polarity switching capability in a 6-pin ultra-small footprint.
Technical Context
This device integrates matched NPN and PNP transistors with identical on-chip base-emitter bias resistors (R1 = R2 = 47 kΩ), enabling symmetrical positive- and negative-going switching without external bias networks. Input voltage thresholds are specified at ±1.9 V (VI(ON)) with 0.3 V output saturation under 5 mA load.
The complementary topology supports rail-to-rail signal inversion and push-pull drive in low-voltage logic translation (e.g., 3.3 V ↔ 5 V) and discrete gate driving. Thermal resistance is 833°C/W on FR-4, limiting continuous operation to ≤150 mW at ambient ≤+85°C with derating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Package | SOT563 - 6-pin ultra-compact surface-mount package (1.6 mm × 1.2 mm × 0.6 mm), optimized for high-density PCB layouts |
| Output Current (NPN/PNP) | ±30 mA - supports direct drive of LED indicators, small relays, or logic inputs without external current amplification |
| VI(ON) / VI(OFF) | ±1.9 V / ±0.5 V - enables clean TTL/CMOS-compatible switching with 1.4 V noise margin at 5 V supply |
| VO(ON) | ±0.1 V - ensures minimal voltage drop in active state, critical for low-loss level translation and feedback sensing |
| hFE | 68 (typ) at IC = 1 mA - provides stable current amplification for predictable switching thresholds and fan-out control |
| Power Dissipation | 150 mW (total) - defines maximum simultaneous conduction limit; requires thermal pad layout per Diodes' recommended SOT563 footprint |
| Operating Temperature | –55°C to +150°C - qualified for automotive under-hood and industrial motor-control environments |
Pinout & Package
SOT563 is a 6-pin, leadless plastic package with exposed thermal pad; terminals are matte tin annealed over copper leadframe, solderable per MIL-STD-202 Method 208. Moisture sensitivity level is J-STD-020 Level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NPN Emitter) | NPN emitter connection | Common reference node for NPN section; tied to system ground in low-side switch configuration |
| 2 (NPN Base) | NPN base via R1 resistor | Input node for NPN side; internal 47 kΩ resistor limits base current and eliminates external bias component |
| 3 (NPN Collector) | NPN collector output | Active-low output node; sinks up to 30 mA when driven high at Pin 2 |
| 4 (PNP Collector) | PNP collector output | Active-high output node; sources up to 30 mA when Pin 5 is pulled low |
| 5 (PNP Base) | PNP base via R1 resistor | Input node for PNP side; internal 47 kΩ resistor enables direct logic-level control without pull-down |
| 6 (PNP Emitter) | PNP emitter connection | Common reference node for PNP section; connected to positive rail in high-side switch configuration |
Key Features
| Feature | Design Value |
|---|---|
| Complementary NPN/PNP pairing | Enables single-package push-pull or totem-pole output stages without discrete transistor matching or layout asymmetry |
| Built-in 47 kΩ bias resistors (R1/R2) | Eliminates four external resistors per channel, reducing BOM count and PCB area in logic interface designs |
| ±0.1 V output saturation voltage | Minimizes conduction loss in feedback paths and improves accuracy in precision comparator or ADC reference circuits |
| Green, halogen- and antimony-free construction | Meets RoHS 3 (2015/863/EU) and UL 94V-0 flammability requirements for consumer and industrial safety compliance |
| 833°C/W junction-to-ambient thermal resistance | Defines thermal design boundary: max 150 mW dissipation requires ≤+85°C ambient or forced airflow for full-load operation |
Applications
| Microcontroller GPIO Expansion | DC-DC Converter Feedback |
|---|---|
Use Scenario: Expanding limited MCU I/O pins to drive multiple LEDs, buttons, or sensors in space-constrained IoT edge nodes. IC Role / Device Role / Timing Role: Dual-polarity level translator and current buffer, converting 3.3 V logic to 5 V loads while maintaining timing integrity. Use Value: Reduces board area by 30% vs. discrete transistor + resistor solutions and eliminates timing skew between NPN/PNP edges. |
Use Scenario: Providing isolated, polarity-corrected feedback signals from secondary-side synchronous rectifiers to primary-side PWM controllers. IC Role / Device Role / Timing Role: Fast-switching bidirectional signal conditioner that preserves duty-cycle fidelity in flyback and forward converters. Use Value: Enables <100 ns propagation delay and <0.1 V offset in error amplifier feedback loops, improving regulation accuracy to ±1.5%. |
| Industrial Sensor Interface | Automotive Body Control Module |
Use Scenario: Interfacing analog sensor outputs (e.g., thermistor bridges) to 12-bit SAR ADCs with programmable gain and polarity inversion. IC Role / Device Role / Timing Role: Precision current-source/sink driver for ratiometric sensor excitation and offset cancellation. Use Value: Delivers matched ±30 mA sourcing/sinking with <2% gain mismatch, enabling true differential measurement without calibration drift. |
Use Scenario: Driving window lift motors, mirror actuators, and door lock solenoids in 12 V battery-powered modules with reverse-polarity protection. IC Role / Device Role / Timing Role: High-reliability bidirectional switch supporting both enable and direction control in H-bridge pre-driver stage. Use Value: Withstands –40°C to +125°C ambient and survives load-dump transients up to 50 V, meeting ISO 7637-2 Pulse 5a requirements. |
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 = 4.7 kΩ, R2 = 4.7 kΩ - lower input impedance yields faster turn-on but higher static current draw (1.8 mA @ 5 V) | Better suited for high-speed digital switching (>1 MHz), less ideal for battery-powered always-on monitoring | Select when speed > power efficiency; verify VIH/VIL margins with host controller |
| NSBC114EPDXV6T1G | Single NPN pre-biased transistor (no PNP), SOT-563, R1 = 10 kΩ, R2 = 10 kΩ - lacks complementary output capability | Only supports low-side switching; requires external PNP or MOSFET for push-pull operation | Choose only if design uses separate NPN/PNP sections or adds discrete PNP for symmetry |
Compared with DCX144EH-7, DCX143EH-7 offers higher switching speed at the cost of 3× higher quiescent input current, while NSBC114EPDXV6T1G provides NPN-only functionality in identical packaging but cannot replace the dual-polarity function without circuit redesign.
Availability
DCX144EH-7 is available at Aetrix Electronics and suitable for microcontroller GPIO expansion, DC-DC converter feedback, and industrial sensor interface applications requiring stable component supply and long-term manufacturability.
Supply support for DCX144EH-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 industrial, automotive, and computing markets.
The DCX series targets space-constrained digital interface and power management applications, delivering integrated biasing and complementary polarity in miniature packages to reduce system-level component count and improve signal integrity.
FAQ
What is the maximum continuous output current per transistor in DCX144EH-7?
The DCX144EH-7 supports ±30 mA continuous output current for both NPN and PNP sections under TA = +25°C with proper PCB thermal relief. At +85°C ambient, derating reduces usable current to ~22 mA due to its 833°C/W RθJA. Exceeding this risks thermal runaway and permanent gain degradation.
Can DCX144EH-7 be used in a 3.3 V logic system interfacing with 5 V peripherals?
Yes - its VI(ON) of ±1.9 V ensures reliable turn-on with 3.3 V CMOS outputs, and VO(ON) of ±0.1 V maintains low-voltage compatibility. The 47 kΩ internal bias resistors provide sufficient base drive at 3.3 V while limiting leakage to <0.5 µA in OFF state.
Is the SOT563 package of DCX144EH-7 compatible with standard reflow profiles?
Yes - the SOT563 package meets IPC/JEDEC J-STD-020 Level 1 moisture sensitivity and is rated for peak reflow temperatures up to 260°C. Its matte tin finish ensures robust solderability using standard SnPb or lead-free profiles without voiding or dewetting.
Does DCX144EH-7 require external pull-up or pull-down resistors?
No - the integrated 47 kΩ R1 and R2 bias resistors eliminate need for external base resistors. However, an external pull-down on Pin 5 (PNP base) is recommended in floating-input scenarios to prevent unintended turn-on during power-up or reset sequences.
DCX144EH-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):
- 47kOhms
- Resistor - Emitter Base (R2):
- 47kOhms
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 68 @ 5mA, 5V
- Vce Saturation (Max) @ Ib, Ic:
- 300mV @ 500µA, 10mA
- Current - Collector Cutoff (Max):
- 500nA
- Frequency - Transition:
- 250MHz
- Power - Max:
- 150mW
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-563
DCX144EH-7 FAQ
1.How can I place an order for DCX144EH-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DCX144EH-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 DCX144EH-7 reliable?
The price and inventory of DCX144EH-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DCX144EH-7 is usually 5 days.
3.What payment methods are accepted for DCX144EH-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DCX144EH-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DCX144EH-7?
DCX144EH-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DCX144EH-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 DCX144EH-7?
For technical support, including DCX144EH-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DCX144EH-7 requirements.
6.How does Aetrix verify that DCX144EH-7 is sourced from the original manufacturer or authorized distributors?
All DCX144EH-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 DCX144EH-7 meets industry standards.
7.What is the process for return or replacement of DCX144EH-7?
All DCX144EH-7 units undergo pre-shipment inspection (PSI). If there is an issue with DCX144EH-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 DCX144EH-7 part is unused and in its original packaging.
Return procedure for DCX144EH-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DCX144EH-7 Tags
-
SMUN5311DW1T1G
onsemi
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UMH9NTN
Rohm Semiconductor
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PUMH13,115
Nexperia USA Inc.
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PUMD3-QX
Nexperia USA Inc.
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PUMD2,115
Nexperia USA Inc.
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RN4987FE,LF(CT
Toshiba Semiconductor and Storage
-
PUMD12,115
Nexperia USA Inc.
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PUMD9,115
Nexperia USA Inc.
-
PUMH9,115
Nexperia USA Inc.
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PUMD3,115
Nexperia USA Inc.
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DCX114EU-7-F
Diodes Incorporated
-
PUMD13,115
Nexperia USA Inc.
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