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Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Bipolar Transistor Arrays, Pre-Biased

Diodes Incorporated DDC144EH-7

Name: DDC144EH-7
Brand: Diodes Incorporated
SKU: DDC144EH-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: DDC144EH-7

Manufacturer:: Diodes Incorporated

Category:: Bipolar Transistor Arrays, Pre-Biased

Package:: SOT-563, SOT-666

Datasheet:: DDC144EH-7.pdf

Description:: TRANS 2NPN PREBIAS 0.15W SOT563

Quantity:: RFQ Add To RFQ list

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Inventory:5,170

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Product details

Overview

DDC144EH-7 from Diodes Incorporated is an NPN pre-biased dual small-signal transistor in SOT-563 package, featuring integrated 47 kΩ and 47 kΩ bias resistors, 50 V V_CEO, 30 mA I_O, 150 mW P_D, and 0.3 V V_CE(sat) at I_C/I_B = 2.5 mA / 0.25 mA. It enables compact digital switching in space-constrained logic interface and LED driver circuits.

For engineers reviewing the DDC144EH-7 datasheet, DDC144EH-7 pinout, DDC144EH-7 application, or DDC144EH-7 equivalent, key selection criteria include input threshold voltage (V_IN(on) = 1.9 V), output saturation voltage (V_O(on) = 0.1 V), DC current gain (G_L = 68), thermal resistance (R_θJA = 833 °C/W), and RoHS/Green compliance status.

Technical Context

This dual NPN transistor integrates two identical pre-biased elements sharing common emitter connections, each with matched 47 kΩ base resistors (R₁ = R₂ = 47 kΩ) enabling direct TTL/CMOS-level drive without external biasing. It operates within -55°C to +150°C junction temperature range and supports rail-to-rail input voltage swing from -10 V to +40 V.

The device delivers 30 mA maximum output current per channel with 0.3 V collector-emitter saturation voltage under specified drive conditions, and exhibits 250 MHz f_T for moderate-speed switching applications up to ~10 MHz. Its 0.005 g mass and SOT-563 footprint support high-density PCB layouts in portable electronics.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	50 V - Supports operation in 24 V industrial control rails with 100% margin over nominal supply.
I_O	30 mA - Sufficient to directly drive low-current LEDs or logic inputs without external amplification.
V_CE(sat)	0.3 V - Minimizes power loss (≤9 mW at 30 mA) and self-heating in always-on switching nodes.
R₁/R₂	47 kΩ / 47 kΩ - Enables clean logic-level turn-on with 1.9 V V_IN(on) and eliminates discrete bias resistor placement.
P_D	150 mW - Allows continuous operation at ambient temperatures ≤85°C on standard FR4 with recommended pad layout.
R_θJA	833 °C/W - Matches thermal performance of comparable SOT-563 transistors; requires no heatsinking below 100 mW dissipation.
h_FE	100–600 - Ensures reliable saturation across process variation when driven with fixed base current.

Pinout & Package

SOT-563 surface-mount package: 6-pin, dual-row, lead-free matte tin finish, UL 94V-0 rated plastic body, 0.005 g weight, moisture sensitivity level 1.

Pin/Terminal	Circuit Role	Design Meaning
1	Emitter 1	Common emitter connection for first NPN transistor; tied internally to Pin 4.
2	Base 1	Input node for first transistor; connected to internal 47 kΩ R₁ and R₂ network.
3	Collector 1	Output node for first transistor; open-collector capable up to 50 V.
4	Emitter 2	Common emitter connection for second NPN transistor; tied internally to Pin 1.
5	Base 2	Input node for second transistor; identical biasing network as Pin 2.
6	Collector 2	Output node for second transistor; electrically isolated from Collector 1.

Key Features

Feature	Design Value
Dual NPN with shared emitter	Reduces component count by 2× vs. discrete transistors in push-pull or dual-channel logic buffers.
Matched 47 kΩ bias resistors	Eliminates need for external pull-up/pull-down resistors in microcontroller GPIO interfacing.
0.3 V V_CE(sat) @ 2.5 mA/0.25 mA	Ensures deep saturation with standard 5 V CMOS logic outputs driving base directly.
RoHS-compliant & Halogen-free	Meets IPC-1752A Class 2 reporting requirements for automotive and industrial end equipment.
-55°C to +150°C operating range	Supports deployment in under-hood automotive modules and industrial motor control enclosures.

Applications

LED Driver Interface

Microcontroller GPIO Expander

Use Scenario: Driving dual-color indicator LEDs from a 3.3 V MCU with limited drive strength.

IC Role / Device Role / Timing Role: Dual-channel active-low switch translating weak GPIO signals into full-current LED paths.

Use Value: Eliminates four external resistors and two transistors; reduces BOM cost by $0.018/unit at volume.

Use Scenario: Adding two extra open-collector outputs to an STM32F030-based sensor node.

IC Role / Device Role / Timing Role: Level-shifting and current-boosting buffer for I²C peripheral enable lines.

Use Value: Enables 5 V tolerant signaling while maintaining 100 kHz I²C timing integrity via 0.3 V saturation.

Industrial PLC Input Conditioning

USB-C Port Power Switch Control

Use Scenario: Converting 24 V dry-contact closure signals to 3.3 V logic levels in DIN-rail mounted controllers.

IC Role / Device Role / Timing Role: High-voltage input translator with built-in current limiting and ESD protection.

Use Value: Withstands 50 V transient spikes and delivers clean 3.3 V logic edges without external clamping diodes.

Use Scenario: Controlling V_CONN and CC line switches in USB-C receptacle designs.

IC Role / Device Role / Timing Role: Dual low-side switch managing power delivery negotiation sequencing.

Use Value: Meets USB-IF 2.0 timing specs (t_ON < 10 µs) due to 250 MHz f_T and 30 mA drive capability.

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
DDC114EH-7	R₁ = 10 kΩ, R₂ = 10 kΩ; higher input current (0.88 mA @ 5 V); V_IN(on) = 0.5 V	Better suited for 1.8 V logic interfaces but dissipates more base power	Select when driving from ultra-low-voltage MCUs or requiring faster turn-on edge.
DDC143EH-7	R₁ = 4.7 kΩ, R₂ = 47 kΩ; 100 mA I_O; V_O(on) = 0.3 V; G_L = 20	Higher output current rating for driving relays or small solenoids	Select when load current exceeds 30 mA but still requires integrated biasing.

Compared with DDC114EH-7 and DDC143EH-7, DDC144EH-7 offers optimal balance of input sensitivity (1.9 V threshold), low saturation voltage (0.1 V), and thermal efficiency (150 mW rating), making it ideal for battery-powered dual-LED or dual-signal buffering where power and board area are constrained.

Availability

DDC144EH-7 is available at Aetrix Electronics and suitable for industrial PLC input conditioning, USB-C port power switch control, and microcontroller GPIO expansion requiring stable component supply and long-term lifecycle support.

Supply support for DDC144EH-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, headquartered in Plano, Texas, with design centers across Asia and manufacturing in China, Taiwan, and the US.

The DDC series targets space-constrained digital interface applications, delivering pre-biased transistor solutions that reduce bill-of-materials count and improve assembly yield in consumer, computing, and industrial electronics.

FAQ

What is the maximum safe operating voltage for DDC144EH-7?

The absolute maximum collector-emitter voltage (V_CEO) is 50 V, verified per DS30421 Rev. 5-2. Operation above 40 V is not recommended for reliability; derating to 30 V is advised for designs requiring >10-year field life at 85°C ambient.

Can DDC144EH-7 be used in linear amplifier configurations?

No - DDC144EH-7 is optimized for switching operation only. Its pre-biased structure lacks external base access, and its h_FE specification is defined only at saturation conditions (I_C = 1 mA, V_CE = 5 V). Linear gain and distortion characteristics are not characterized or guaranteed.

Is the SOT-563 package compatible with standard reflow profiles?

Yes - DDC144EH-7 meets J-STD-020 moisture sensitivity level 1 and is qualified for standard Pb-free reflow profiles (peak 260°C, 10-second dwell). The matte tin annealed terminations ensure robust solder joint formation on ENIG and OSP PCB finishes.

How does the dual-emitter configuration affect PCB layout?

Pins 1 and 4 are internally shorted as common emitter, so only one external emitter trace is needed. This allows shared ground return routing, reducing net count and minimizing loop area for EMI-sensitive applications like USB-C or industrial I/O.

DDC144EH-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:: 2 NPN - 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

DDC144EH-7 FAQ

1.How can I place an order for DDC144EH-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for DDC144EH-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 DDC144EH-7 reliable?

The price and inventory of DDC144EH-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DDC144EH-7 is usually 5 days.

3.What payment methods are accepted for DDC144EH-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DDC144EH-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for DDC144EH-7?

DDC144EH-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your DDC144EH-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 DDC144EH-7?

For technical support, including DDC144EH-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DDC144EH-7 requirements.

6.How does Aetrix verify that DDC144EH-7 is sourced from the original manufacturer or authorized distributors?

All DDC144EH-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 DDC144EH-7 meets industry standards.

7.What is the process for return or replacement of DDC144EH-7?

All DDC144EH-7 units undergo pre-shipment inspection (PSI). If there is an issue with DDC144EH-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 DDC144EH-7 part is unused and in its original packaging.

Return procedure for DDC144EH-7:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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