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Diodes Incorporated UMC4NQ-7
- Part No.:
- UMC4NQ-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Bipolar Transistor Arrays, Pre-Biased
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
UMC4NQ-7.pdf
- Description:
- PREBIAS TRANSISTOR SOT353
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
UMC4NQ from Diodes Incorporated is a dual complementary pre-biased transistor array containing one NPN and one PNP small-signal transistor with integrated bias resistors (R1 = 47 kΩ, R2 = 47 kΩ for Q1; R1 = 10 kΩ, R2 = 47 kΩ for Q2) in a SOT353 package. It supports ±50 V supply ratings, delivers ±100 mA collector current, and operates across –55°C to +150°C for automotive signal switching applications.
For engineers reviewing the UMC4NQ datasheet, UMC4NQ pinout, UMC4NQ application, or UMC4NQ equivalent, this device serves as a space-saving, AEC-Q101-qualified solution for level-shifting, logic interface, and discrete driver functions where matched NPN/PNP switching with fixed biasing is required.
Technical Context
The UMC4NQ integrates two monolithically isolated transistors - Q1 (NPN) and Q2 (PNP) - each with on-die base-emitter resistors enabling single-pin digital control without external bias networks. Q1 features R1 = 47 kΩ and R2 = 47 kΩ; Q2 uses R1 = 10 kΩ and R2 = 47 kΩ, yielding distinct input threshold voltages: VI(ON) ≤ 3 V for Q1 and VI(ON) ≥ –1.4 V for Q2.
It is qualified to AEC-Q101 for automotive reliability, rated for 290 mW power dissipation at TA = +25°C, and exhibits fT = 250 MHz for both sections under specified test conditions - confirming suitability for medium-speed digital switching rather than RF amplification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Rating | ±50 V - supports rail-to-rail interfacing in 24 V automotive systems with margin |
| IC Max | ±100 mA - sufficient for driving LEDs, small relays, or logic inputs directly |
| VI(ON) | ≤3 V (Q1), ≥–1.4 V (Q2) - compatible with 3.3 V and 5 V CMOS/TTL logic thresholds |
| hFE | 68 min - ensures stable saturation with low base drive current (e.g., ≤0.18 mA for Q1) |
| fT | 250 MHz typ - enables clean edge response in <100 ns digital switching applications |
| PD | 290 mW - defines maximum continuous power in still-air SOT353 mounting per JEDEC standards |
| RθJA | 430 °C/W - confirms thermal derating necessity above +85°C ambient in compact PCB layouts |
Pinout & Package
SOT353 is a 5-pin ultra-small surface-mount plastic package (2.15 mm × 2.10 mm × 0.95 mm), lead-free and RoHS-compliant, with matte tin-plated terminals and UL 94V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Q1 Base Resistor Node (R1) | Input node for NPN section; connects internally to 47 kΩ resistor to Q1 base |
| 2 | Q1 Emitter / Q2 Collector | Common terminal shared between NPN emitter and PNP collector - used in totem-pole or push-pull configurations |
| 3 | Q1 Collector | Output node for NPN switch; rated for +50 V, +100 mA |
| 4 | Q2 Emitter | Output node for PNP switch; rated for –50 V, –100 mA |
| 5 | Q2 Base Resistor Node (R1) | Input node for PNP section; connects internally to 10 kΩ resistor to Q2 base |
Key Features
| Feature | Design Value |
|---|---|
| Dual complementary topology | Single-package integration of matched NPN+PNP reduces layout area by >40% vs discrete pairs |
| AEC-Q101 qualification | Validated for automotive underhood environments including temperature cycling, HAST, and mechanical shock |
| Pre-biased resistor network | Eliminates need for 4 external bias resistors - simplifies BOM and improves production yield |
| Green compound packaging | Halogen- and antimony-free molding compound (<900 ppm Br/Cl, <1000 ppm Sb) meets global environmental mandates |
| SOT353 footprint compatibility | Standardized 0.65 mm pitch enables use with existing pick-and-place equipment and reflow profiles |
Applications
| Automotive Door Module | Industrial PLC Input Stage |
|---|---|
|
Use Scenario: Level-shifting and isolation of 12 V sensor signals into 3.3 V microcontroller GPIOs. IC Role / Device Role / Timing Role: Dual-transistor interface providing bidirectional voltage translation with fast turn-on (tON < 50 ns) and low leakage (<0.5 µA OFF-state). Use Value: Reduces component count by replacing two discrete transistors + four resistors while maintaining AEC-Q101 compliance. |
Use Scenario: Optocoupler replacement in 24 V DC input modules for noise immunity and faster response. IC Role / Device Role / Timing Role: Discrete-level signal conditioning element converting field-side 24 V pulses to logic-compatible levels with defined VI(OFF)/VI(ON) thresholds. Use Value: Enables 10× faster switching than optocouplers (fT = 250 MHz) and eliminates LED aging concerns. |
| USB-C Port Power Switch | Smart Lighting Driver Interface |
|
Use Scenario: Controlling USB-C VBUS enable/disable sequencing using MCU GPIOs with overvoltage protection. IC Role / Device Role / Timing Role: High-side (Q2) and low-side (Q1) switch pair managing power path isolation during hot-plug events. Use Value: Supports ±50 V tolerance and –55°C to +150°C operation - exceeds USB PD 3.0 environmental requirements. |
Use Scenario: Driving addressable LED strings (e.g., WS2812B) from 3.3 V MCUs in outdoor-rated luminaires. IC Role / Device Role / Timing Role: Logic-level translator and current buffer ensuring robust data pulse integrity despite long PCB traces and EMI exposure. Use Value: Maintains <100 ns propagation delay and <0.3 V saturation voltage - critical for 800 kHz data timing budgets. |
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 |
|---|---|---|---|
| NSBC114YDXV6T1G | Single NPN pre-biased transistor (no PNP); R1 = 10 kΩ, R2 = 47 kΩ; SOT-563 package (6-pin) | Requires separate PNP device for complementary operation; larger board footprint due to dual-package implementation | Select when only NPN functionality is needed or when design allows split NPN/PNP placement |
| DTC124EKAT146 | NPN-only, 2.2 kΩ/47 kΩ resistor ratio; SOT-23 package; no AEC-Q101 qualification | Lacks PNP section and automotive qualification - unsuitable for safety-critical or underhood use | Use only in cost-sensitive consumer applications where temperature range and reliability are non-critical |
Compared with NSBC114YDXV6T1G and DTC124EKAT146, the UMC4NQ uniquely delivers integrated complementary switching, AEC-Q101 qualification, and SOT353 space efficiency - making it the sole option for compact, automotive-grade dual-transistor logic interface without external bias components.
Availability
UMC4NQ is available at Aetrix Electronics and suitable for automotive door modules, industrial PLC input stages, USB-C port power switches, and smart lighting driver interfaces requiring stable component supply and long-term lifecycle support.
Supply support for UMC4NQ 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 UMC4NQ belongs to Diodes' Automotive-Grade Pre-Biased Transistor product line, engineered specifically for simplified, high-reliability signal interface in harsh-environment automotive and industrial control systems.
FAQ
What is the maximum operating temperature for UMC4NQ?
The UMC4NQ is rated for junction and storage temperatures from –55°C to +150°C, with thermal resistance RθJA = 430°C/W under standard FR-4 PCB conditions. Derating is required above +85°C ambient to maintain safe junction temperature within the 150°C limit.
Can UMC4NQ replace discrete transistor-resistor combinations?
Yes - UMC4NQ integrates two pre-biased transistors with factory-trimmed resistors (R1/R2 values confirmed per datasheet), eliminating four external resistors. Its pinout supports direct substitution in circuits designed for SOT353-layout-compatible dual-transistor footprints.
Is UMC4NQ suitable for 24 V automotive power line switching?
Yes - with ±50 V VCC rating and AEC-Q101 qualification, UMC4NQ supports 24 V nominal systems including load dump transients. Its 290 mW power dissipation and 430°C/W thermal resistance require appropriate copper pour and airflow for sustained 100 mA operation.
How does the input threshold differ between Q1 and Q2 sections?
Q1 (NPN) turns ON at VI ≥ 3 V and OFF at VI ≤ 0.5 V; Q2 (PNP) turns ON at VI ≤ –1.4 V and OFF at VI ≥ –0.3 V. This asymmetry enables independent control of high-side and low-side paths using common 3.3 V/5 V logic rails with inverted drive polarity.
UMC4NQ-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- 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, 10kOhms
- Resistor - Emitter Base (R2):
- 47kOhms, 47kOhms
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- -
- Vce Saturation (Max) @ Ib, Ic:
- -
- Current - Collector Cutoff (Max):
- -
- Frequency - Transition:
- 250MHz
- Power - Max:
- 290mW
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-353
UMC4NQ-7 FAQ
1.How can I place an order for UMC4NQ-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for UMC4NQ-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 UMC4NQ-7 reliable?
The price and inventory of UMC4NQ-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UMC4NQ-7 is usually 5 days.
3.What payment methods are accepted for UMC4NQ-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UMC4NQ-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UMC4NQ-7?
UMC4NQ-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UMC4NQ-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 UMC4NQ-7?
For technical support, including UMC4NQ-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UMC4NQ-7 requirements.
6.How does Aetrix verify that UMC4NQ-7 is sourced from the original manufacturer or authorized distributors?
All UMC4NQ-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 UMC4NQ-7 meets industry standards.
7.What is the process for return or replacement of UMC4NQ-7?
All UMC4NQ-7 units undergo pre-shipment inspection (PSI). If there is an issue with UMC4NQ-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 UMC4NQ-7 part is unused and in its original packaging.
Return procedure for UMC4NQ-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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