Diodes Incorporated UMC4N-7

Overview

UMC4N-7 from Diodes Incorporated is a dual complementary pre-biased transistor array containing one NPN (Q1) and one PNP (Q2) transistor with integrated bias resistors in a single SOT353 package. It features R1 = 47 kΩ / R2 = 47 kΩ for Q1 and R1 = 10 kΩ / R2 = 47 kΩ for Q2, 150 mW power dissipation, and AEC-Q101 qualification for automotive-grade reliability. It is used in level-shifting, signal inversion, and discrete logic interface circuits in compact consumer and industrial control modules.

For engineers reviewing the UMC4N-7 datasheet, UMC4N-7 pinout, UMC4N-7 application, or UMC4N-7 equivalent, key selection considerations include verified input voltage thresholds (VI(OFF)/VI(ON) = 0.5 V / 3 V for Q1, −0.3 V / −1.4 V for Q2), guaranteed VO(ON) ≤ 0.3 V (Q1) and ≤ −0.3 V (Q2), DC current gain GI ≥ 68, and SOT353 footprint compatibility with automated assembly.

Technical Context

The UMC4N-7 integrates two monolithic silicon transistors - an NPN (Q1) and a PNP (Q2) - each with factory-trimmed on-chip base bias resistors enabling direct digital logic interfacing without external components. The NPN section supports 50 V V_CC, 100 mA I_C, and 30 mA I_O; the PNP section supports −50 V V_CC, −100 mA I_C, and −100 mA I_O.

Its thermal resistance R_θJA is 833 °C/W on FR-4 PCB with 1 oz copper, and it operates across −55 °C to +150 °C. Both transistors meet AEC-Q101 stress testing requirements, confirming suitability for under-hood automotive electronics where space, reliability, and simplified BOM are critical.

Key Specifications

Pinout & Package

SOT353 is a 5-pin ultra-small surface-mount plastic package (2.15 mm × 2.10 mm × 1.00 mm), qualified for automated pick-and-place and reflow assembly. Its lead-free matte tin terminals comply with MIL-STD-202 Method 208 solderability requirements.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar pre-biased transistor array applications.

Compared with NSBC114EDXV6T1G and EMH11T2R, the UMC4N-7 uniquely delivers integrated NPN+PNP functionality in a 5-pin SOT353 package with AEC-Q101 qualification, enabling compact, automotive-grade bidirectional interface designs without component duplication or derating compromises.

Availability

UMC4N-7 is available at Aetrix Electronics and suitable for automotive body control units, industrial PLC input modules, and smart home sensor hubs requiring stable component supply and long-term lifecycle support.

Supply support for UMC4N-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 UMC4N series belongs to Diodes' pre-biased transistor portfolio, engineered specifically for space-constrained, high-reliability interface applications in automotive and industrial electronics where simplified BOM and AEC-Q101 compliance are mandatory.

FAQ

What is the maximum operating temperature range for UMC4N-7?

The UMC4N-7 is rated for operation from −55 °C to +150 °C, with thermal characteristics validated under steady-state conditions on FR-4 PCB with 1 oz copper. This full range is supported by AEC-Q101 qualification, making it suitable for under-hood automotive environments and industrial enclosures without forced cooling.

Can UMC4N-7 replace discrete transistor + resistor combinations in new designs?

Yes - the UMC4N-7 replaces two transistors and four external bias resistors with a single SOT353 device. Its factory-trimmed R1/R2 networks (47 kΩ/47 kΩ for Q1; 10 kΩ/47 kΩ for Q2) ensure consistent VI(ON)/VI(OFF) thresholds and eliminate resistor tolerance stacking, reducing design iteration time and improving production yield.

Is UMC4N-7 pin-compatible with other SOT353 pre-biased transistors?

No - the UMC4N-7 has a unique pin assignment: Pin 1 = Q1 emitter, Pin 2 = Q1 base, Pin 3 = Q1 collector, Pin 4 = Q2 emitter, Pin 5 = Q2 collector. Other SOT353 pre-biased devices (e.g., NSBC114EDXV6T1G) use different internal configurations and pinouts; direct substitution requires schematic and layout revision.

Does UMC4N-7 support 1.8 V logic input levels?

No - the Q1 section requires VI(ON) ≥ 3 V to guarantee turn-on, and Q2 requires VI(ON) ≤ −1.4 V. At 1.8 V, Q1 remains in cutoff (VI < VI(ON)), and Q2 cannot be reliably activated. For 1.8 V systems, consider logic-level shifters or MOSFET-based alternatives with lower gate thresholds.