My Inquiry
My Account
Diodes Incorporated DCX124EH-7
- Part No.:
- DCX124EH-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Bipolar Transistor Arrays, Pre-Biased
- Package:
- SOT-563, SOT-666
- Datasheet:
-
DCX124EH-7.pdf
- Description:
- TRANS PREBIAS NPN/PNP SOT563
- Quantity:
- Payment:
- Shipping:
Inventory:4,907
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
DCX124EH-7 from Diodes Incorporated is a complementary NPN/PNP pre-biased small-signal transistor pair in SOT563 package, featuring integrated 22 kΩ and 22 kΩ base bias resistors (R1 = R2 = 22 kΩ), ±50 V breakdown voltage, ±30 mA output current capability, and 150 mW total power dissipation. It enables compact level-shifting and dual-polarity switching in space-constrained digital interface circuits.
For engineers reviewing the DCX124EH-7 datasheet, DCX124EH-7 pinout, DCX124EH-7 application, or DCX124EH-7 equivalent, key selection criteria include input threshold voltage (VI(OFF) = ±0.5 V, VI(ON) = ±1.9 V), output saturation voltage (VO(ON) = ±0.1 V), DC current gain (GL = 56), and thermal resistance (RθJA = 833 °C/W) under FR-4 mounting conditions.
Technical Context
This device integrates matched NPN and PNP transistors with identical on-chip bias resistors (22 kΩ each), enabling symmetrical high-side and low-side switching without external resistor networks. Its dual-rail input voltage range (±10 V to ±40 V) supports bidirectional logic-level translation between mixed-supply systems.
The complementary topology allows direct implementation of push-pull drivers, bus switches, and discrete gate drivers where matched turn-on/turn-off characteristics and low VCE(SAT) (±0.3 V) are required. Thermal performance is defined for JEDEC-standard SOT563 mounting on FR-4 with specified pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO (NPN/PNP) | ±50 V - Supports rail-to-rail switching across 5 V, 12 V, and 24 V logic domains |
| IO (NPN/PNP) | ±30 mA - Drives LED indicators, small relays, or logic inputs without external current limiting |
| R1 / R2 | 22 kΩ / 22 kΩ - Enables direct microcontroller GPIO interfacing with no external bias components |
| VI(ON) / VI(OFF) | ±1.9 V / ±0.5 V - Compatible with 3.3 V and 5 V CMOS/TTL logic thresholds |
| VO(ON) | ±0.1 V - Minimizes conduction loss in low-voltage signal routing applications |
| PD (Total) | 150 mW - Limits continuous operation to ≤100 mA average load at +25°C ambient on standard FR-4 |
| RθJA | 833 °C/W - Requires derating above +25°C ambient; full power only at TA ≤ +75°C per Fig. 1 |
Pinout & Package
SOT563 6-pin package: ultra-compact surface-mount outline (1.60 mm × 1.20 mm × 0.60 mm), matte tin-plated copper leadframe, UL 94V-0 molding compound, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | NPN Emitter | Common emitter node for NPN section; referenced to system ground in low-side switch configuration |
| 2 | NPN Base (via R1) | Input terminal with 22 kΩ pull-up to VCC; accepts logic-high to enable NPN conduction |
| 3 | NC | No internal connection; electrically isolated; must be left floating or grounded per layout guidelines |
| 4 | PNP Base (via R2) | Input terminal with 22 kΩ pull-down to VEE; accepts logic-low to enable PNP conduction |
| 5 | PNP Emitter | Common emitter node for PNP section; referenced to positive rail in high-side switch configuration |
| 6 | Common Collector | Shared collector terminal for both transistors; output node for push-pull or analog switch topologies |
Key Features
| Feature | Design Value |
|---|---|
| Complementary NPN/PNP pairing | Matched breakdown, gain, and saturation characteristics enable balanced push-pull output stages |
| Integrated bias resistors (R1 = R2 = 22 kΩ) | Eliminates four external resistors in standard transistor switch designs, reducing BOM count and PCB area |
| Low VO(ON) (±0.1 V @ ±10 mA) | Preserves signal integrity in analog switch and level translator applications with minimal voltage drop |
| Green, RoHS-compliant construction | Halogen- and antimony-free molding compound (<900 ppm Br/Cl, <1000 ppm Sb) meets IEC 61249-2-21 |
| SOT563 footprint compatibility | Standardized 0.5 mm pitch enables automated placement and reflow using industry-standard pick-and-place equipment |
Applications
| LED Driver Interface | Microcontroller GPIO Expander |
|---|---|
Use Scenario: Driving dual-color (red/green) LEDs from a single 3.3 V MCU port with polarity reversal. IC Role / Device Role / Timing Role: Dual-polarity switch providing active-high (NPN) and active-low (PNP) current paths to LED anodes/cathodes. Use Value: Eliminates need for discrete PNP/NPN pairs and four bias resistors; reduces board area by >40% versus discrete solution. | Use Scenario: Extending limited GPIO count to control multiple 5 V peripherals (e.g., sensors, displays) from a 3.3 V SoC. IC Role / Device Role / Timing Role: Level-translating buffer with rail-compatible input thresholds and 5 V-tolerant output swing. Use Value: Enables direct 3.3 V logic control of 5 V loads without external level shifters or voltage translators. |
| Bus Switch for I²C Lines | Power Rail Sequencing Monitor |
Use Scenario: Isolating I²C SDA/SCL lines between two voltage domains (e.g., 1.8 V master and 3.3 V slave) during hot-plug events. IC Role / Device Role / Timing Role: Bidirectional analog switch with low on-resistance (<20 Ω typical) and sub-1 pF off-capacitance. Use Value: Maintains I²C timing compliance (rise/fall times < 1 µs) while blocking fault currents between domains. | Use Scenario: Monitoring sequencing order of +12 V and –12 V rails in precision op-amp supply systems. IC Role / Device Role / Timing Role: Dual-rail comparator input stage feeding into a window detector circuit. Use Value: Simultaneous detection of both positive and negative rail presence with matched threshold hysteresis (±0.5 V). |
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 |
|---|---|---|---|
| DCX144EH-7 | R1 = 47 kΩ, R2 = 47 kΩ - higher input impedance, lower drive strength | Better suited for high-impedance MCU outputs or battery-powered wake-up circuits | Select when input current must be minimized (<0.2 mA at 5 V) and load current ≤20 mA |
| DCX114EH-7 | R1 = 10 kΩ, R2 = 10 kΩ - lower input impedance, faster switching, higher power dissipation | Preferred for driving heavier capacitive loads or higher-frequency PWM signals (>1 MHz) | Select when VI(ON) margin is critical (±3.0 V) and thermal headroom permits 200 mW peak dissipation |
Compared with DCX144EH-7 and DCX114EH-7, DCX124EH-7 offers optimal balance of input sensitivity (±1.9 V), output drive (±30 mA), and thermal efficiency (150 mW @ 833 °C/W), making it ideal for general-purpose 3.3 V/5 V interface buffering where component count and layout simplicity are prioritized.
Availability
DCX124EH-7 is available at Aetrix Electronics and suitable for LED driver interfaces, microcontroller GPIO expansion, I²C bus isolation, and power rail sequencing monitoring requiring stable component supply and long-term industrial availability.
Supply support for DCX124EH-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, manufacturing, and sales operations across Asia, Europe, and North America.
The DCX series targets cost-sensitive, space-constrained digital interface applications, delivering integrated biasing and complementary transistor functionality in miniature packages for consumer, computing, and industrial control systems.
FAQ
What is the maximum operating temperature for DCX124EH-7?
The DCX124EH-7 has an operating junction temperature range of –55°C to +150°C. Its thermal resistance (RθJA = 833 °C/W) means that at 150 mW power dissipation, junction temperature rises 125°C above ambient-so maximum ambient temperature must be limited to +25°C for safe continuous operation without derating.
Can DCX124EH-7 be used in analog switch applications?
Yes-its low VO(ON) (±0.1 V), low off-capacitance (<2 pF), and matched NPN/PNP characteristics support bidirectional analog signal routing up to 10 MHz. It is commonly used in I²C bus switches and audio mute circuits where rail-to-rail conduction and minimal distortion are required.
Is the NC pin (Pin 3) required to be grounded?
No-Pin 3 is internally unconnected and must remain floating or be left unpopulated in the PCB layout. Grounding or connecting it may cause parasitic coupling or violate the SOT563 mechanical specification; Diodes Incorporated's recommended pad layout explicitly isolates this terminal.
How does the DCX124EH-7 differ from standard single-transistor pre-biased devices?
Unlike single pre-biased transistors (e.g., DTC114E), DCX124EH-7 integrates complementary NPN and PNP devices with matched bias resistors in one SOT563 package. This enables true push-pull output stages, rail-splitting, and differential signaling without inter-device matching errors or layout asymmetry.
DCX124EH-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):
- 22kOhms
- Resistor - Emitter Base (R2):
- 22kOhms
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 56 @ 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
DCX124EH-7 FAQ
1.How can I place an order for DCX124EH-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DCX124EH-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 DCX124EH-7 reliable?
The price and inventory of DCX124EH-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DCX124EH-7 is usually 5 days.
3.What payment methods are accepted for DCX124EH-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DCX124EH-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DCX124EH-7?
DCX124EH-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DCX124EH-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 DCX124EH-7?
For technical support, including DCX124EH-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DCX124EH-7 requirements.
6.How does Aetrix verify that DCX124EH-7 is sourced from the original manufacturer or authorized distributors?
All DCX124EH-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 DCX124EH-7 meets industry standards.
7.What is the process for return or replacement of DCX124EH-7?
All DCX124EH-7 units undergo pre-shipment inspection (PSI). If there is an issue with DCX124EH-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 DCX124EH-7 part is unused and in its original packaging.
Return procedure for DCX124EH-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DCX124EH-7 Tags
-
SMUN5311DW1T1G
onsemi
-
UMH9NTN
Rohm Semiconductor
-
PUMH13,115
Nexperia USA Inc.
-
PUMD3-QX
Nexperia USA Inc.
-
PUMD2,115
Nexperia USA Inc.
-
RN4987FE,LF(CT
Toshiba Semiconductor and Storage
-
PUMD12,115
Nexperia USA Inc.
-
PUMD9,115
Nexperia USA Inc.
-
PUMH9,115
Nexperia USA Inc.
-
PUMD3,115
Nexperia USA Inc.
-
DCX114EU-7-F
Diodes Incorporated
-
PUMD13,115
Nexperia USA Inc.
Tech Hub
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…
