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Diodes Incorporated DCX144EK-7-F
- Part No.:
- DCX144EK-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Bipolar Transistor Arrays, Pre-Biased
- Package:
- SC-74, SOT-457
- Datasheet:
-
DCX144EK-7-F.pdf
- Description:
- TRANS NPN/PNP PREBIAS 0.3W SC74R
- Quantity:
- Payment:
- Shipping:
Inventory:3,892
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Product details
Overview
DCX144EK-7-F from Diodes Incorporated is a dual complementary pre-biased transistor in SOT26 package, integrating one NPN and one PNP BJT with matched 47kΩ input bias resistors (R1 = R2 = 47kΩ). It supports ±50V VCEO, delivers ±30mA output current per section, and operates across –55°C to +150°C for automotive and industrial logic interface applications.
For engineers reviewing the DCX144EK-7-F datasheet, DCX144EK-7-F pinout, DCX144EK-7-F application, or DCX144EK-7-F equivalent, key selection criteria include verified input voltage thresholds (VIN(on) = ±1.65V/±1.9V), low saturation voltage (VCE(sat) ≤ ±0.3V), integrated resistor tolerance (±30%), and AEC-Q101 qualification readiness.
Technical Context
This device implements a dual-channel, complementary pre-biased transistor topology where each section integrates base-emitter and base-collector bias resistors on a single epitaxial planar die. The NPN and PNP sections share identical R1/R2 values (47kΩ) and exhibit symmetrical electrical behavior under opposite polarity supply conditions.
It functions as a logic-level translator and switch driver with defined turn-on/off thresholds (VIN(on) = +1.65V/–1.9V, VIN(off) = +0.5V/–0.5V), fixed current gain (hFE = 100–600), and guaranteed saturation performance at IC/IB = 10 under ±5V bias.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | ±50V - Enables direct interfacing with 24V industrial buses and 48V telecom rails without external level-shifting. |
| IO (per section) | ±30mA - Sufficient to drive LED indicators, small relays, or gate inputs of power MOSFETs in compact control modules. |
| VCE(sat) | ≤ ±0.3V @ IC/IB = 10 - Minimizes conduction loss and self-heating in high-duty-cycle switching applications. |
| R1 / R2 | 47kΩ ±30% - Provides consistent base biasing for predictable turn-on behavior across temperature and process variation. |
| PD (total) | 300mW - Supports continuous operation at ambient temperatures up to +85°C on standard FR-4 PCBs with minimal heatsinking. |
| TJ range | –55°C to +150°C - Validated for under-hood automotive environments and industrial motor control enclosures. |
| hFE | 100–600 @ IC = ±1mA, VCE = ±5V - Ensures stable current amplification across wide operating conditions without external gain-setting components. |
Pinout & Package
Package: SOT26 - Surface-mount plastic package with UL 94V-0 flammability rating, matte tin-plated leads, and 0.016g mass. Dimensions: 3.00 × 2.80 × 1.10 mm (L × E × A2).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (C1) | NPN collector | Main current sink node for high-side NPN switching; connects to load return path in active-low configurations. |
| 2 (B1) | NPN base | Internally connected to R1 (47kΩ) and R2 (47kΩ); accepts logic-level input to enable NPN conduction. |
| 3 (E1) | NPN emitter | Common emitter reference for NPN section; tied to ground or low-side rail in standard switch topology. |
| 4 (E2) | PNP emitter | Common emitter reference for PNP section; tied to positive supply rail in high-side switch configurations. |
| 5 (B2) | PNP base | Internally connected to R1 (47kΩ) and R2 (47kΩ); accepts inverted logic input to enable PNP conduction. |
| 6 (C2) | PNP collector | Main current source node for high-side PNP switching; drives loads referenced to ground. |
Key Features
| Feature | Design Value |
|---|---|
| Dual complementary topology | Single SOT26 package integrates matched NPN+PNP transistors with identical bias resistors-reduces board space by 50% vs. discrete solutions. |
| Built-in bias resistors | 47kΩ R1 and R2 with ±30% tolerance eliminate external base resistors and simplify PCB layout for microcontroller GPIO interfacing. |
| Automotive-grade construction | Epitaxial planar die, halogen/antimony-free "Green" materials, and IATF 16949 manufacturing support AEC-Q101 stress testing compliance. |
| Symmetrical switching thresholds | VIN(on) = +1.65V (NPN) / –1.9V (PNP) enables robust noise margin in mixed-polarity digital systems without additional hysteresis circuitry. |
| Thermal robustness | RθJA = 417°C/W allows full 300mW dissipation at TA ≤ +85°C using standard pad layout-no thermal vias required for typical use cases. |
Applications
| LED Driver Interface | Microcontroller GPIO Expander |
|---|---|
|
Use Scenario: Driving bi-color LED indicators from 3.3V/5V MCU outputs with polarity reversal capability. IC Role / Device Role / Timing Role: Dual-section switch provides simultaneous sourcing (PNP) and sinking (NPN) paths for common-anode/cathode LED pairs. Use Value: Eliminates need for two separate transistors and four external resistors-reducing BOM count by 6 components per channel. |
Use Scenario: Extending limited GPIO count in industrial PLC I/O modules to control multiple relay coils or optocouplers. IC Role / Device Role / Timing Role: Acts as level-translating buffer between low-voltage logic and 12–24V field-side circuits with fast turn-on (<100ns propagation delay implied by fT = 250MHz). Use Value: Maintains signal integrity across voltage domains while supporting >10kHz PWM dimming or relay cycling without timing skew. |
| Automotive Body Control Module | Power Supply Sequencing Circuit |
|
Use Scenario: Controlling door lock actuators and interior lighting in AEC-Q101-compliant BCM designs. IC Role / Device Role / Timing Role: High-side (PNP) and low-side (NPN) driver for bidirectional solenoid control with reverse-polarity protection. Use Value: Withstands load dump transients up to ±50V and operates reliably at –40°C to +125°C junction temperature. |
Use Scenario: Enabling controlled power-up/down sequencing of multi-rail FPGA or ASIC supplies in telecom equipment. IC Role / Device Role / Timing Role: Precision threshold detector and latch driver that activates downstream regulators only after primary rail stabilization. Use Value: Input voltage hysteresis (VIN(on) – VIN(off) = 1.15V) prevents oscillation during slow-rising supply ramps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual pre-biased transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DCX124EK-7-F | R1 = R2 = 22kΩ (vs. 47kΩ), higher input current (0.88mA @ 5V), lower VIN(on) (+1.4V) | Better suited for weak-drive MCUs but less noise-immune in noisy automotive environments | Select when driving from 3.3V logic with marginal current drive capability |
| DCX114YK-7-F | Asymmetric bias (R1 = 10kΩ, R2 = 47kΩ), VIN(on) = +1.9V/–1.9V, IO = ±70mA | Higher output current supports heavier loads but introduces asymmetry in switching thresholds | Choose for applications requiring stronger sink capability without increasing PNP drive strength |
Compared with DCX124EK-7-F and DCX114YK-7-F, DCX144EK-7-F offers balanced NPN/PNP drive strength and optimal noise immunity for 5V logic interfaces-making it preferred for symmetric control tasks like H-bridge pre-driver stages or dual-directional signal conditioning.
Availability
DCX144EK-7-F is available at Aetrix Electronics and suitable for automotive body electronics, industrial I/O modules, and consumer appliance control panels requiring stable component supply and long-term lifecycle assurance.
Supply support for DCX144EK-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 semiconductor company specializing in discrete, analog, and mixed-signal devices for power management, signal integrity, and connectivity applications.
The DCX series targets cost-sensitive, space-constrained logic interface and switching applications-designed to replace discrete transistor-resistor combinations in automotive, industrial, and computing systems.
FAQ
Is DCX144EK-7-F qualified for automotive applications?
DCX144EK-7-F is manufactured in IATF 16949-certified facilities and designed to meet AEC-Q101 stress test requirements. While not pre-qualified, its construction-including epitaxial planar die, halogen-free materials, and –55°C to +150°C operating range-supports automotive qualification upon customer PPAP submission.
What is the maximum safe operating current per section?
The absolute maximum output current is ±30mA per section under continuous DC conditions. At this level, with VCE(sat) ≤ ±0.3V and RθJA = 417°C/W, junction temperature rise remains within limits (ΔTJ ≈ 37°C) on standard FR-4 PCBs, enabling reliable operation at TA ≤ +85°C.
Can DCX144EK-7-F be used with 3.3V logic inputs?
Yes. Its NPN VIN(on) = +1.65V (min) and PNP VIN(on) = –1.9V ensure reliable turn-on with 3.3V CMOS outputs. For margin-critical designs, verify VIN(off) = +0.5V/–0.5V ensures full cutoff under logic-low states, preventing leakage-induced false triggering.
How does the 47kΩ bias resistor affect input impedance?
The 47kΩ R1/R2 network sets an effective input impedance of ~47kΩ to ground (NPN) or VCC (PNP), drawing ~0.1mA at 5V. This light loading preserves signal integrity on MCU GPIOs while providing sufficient base current for guaranteed saturation at IC = ±30mA.
DCX144EK-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-74, SOT-457
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- 300mW
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-74R
DCX144EK-7-F FAQ
1.How can I place an order for DCX144EK-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for DCX144EK-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 DCX144EK-7-F reliable?
The price and inventory of DCX144EK-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 DCX144EK-7-F is usually 5 days.
3.What payment methods are accepted for DCX144EK-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DCX144EK-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DCX144EK-7-F?
DCX144EK-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DCX144EK-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 DCX144EK-7-F?
For technical support, including DCX144EK-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DCX144EK-7-F requirements.
6.How does Aetrix verify that DCX144EK-7-F is sourced from the original manufacturer or authorized distributors?
All DCX144EK-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 DCX144EK-7-F meets industry standards.
7.What is the process for return or replacement of DCX144EK-7-F?
All DCX144EK-7-F units undergo pre-shipment inspection (PSI). If there is an issue with DCX144EK-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 DCX144EK-7-F part is unused and in its original packaging.
Return procedure for DCX144EK-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DCX144EK-7-F Tags
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SMUN5311DW1T1G
onsemi
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UMH9NTN
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PUMH13,115
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PUMD3-QX
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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
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PUMD13,115
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