Diodes Incorporated UMC5N-7

Overview

UMC5N-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 delivers 100 mA max collector current per transistor, 47 kΩ/4.7 kΩ input resistors, and operates across –55°C to +150°C. Used in level-shifting and digital logic interface circuits for automotive body control modules.

For engineers reviewing the UMC5N-7 datasheet, UMC5N-7 pinout, UMC5N-7 application, or UMC5N-7 equivalent, key selection criteria include verified dual-polarity switching capability, guaranteed VI(ON)/VI(OFF) thresholds for TTL/CMOS compatibility, resistor ratio tolerance (R2/R1 = 0.8–1.2 for Q1; 1.7–2.6 for Q2), and AEC-Q101 qualification for automotive-grade reliability.

Technical Context

The UMC5N-7 integrates two monolithically isolated transistors-Q1 (NPN) with 47 kΩ base resistors and Q2 (PNP) with 4.7 kΩ/10 kΩ resistors-enabling independent high-side and low-side switching without external bias networks. Its matched resistor ratios ensure consistent turn-on/turn-off behavior across temperature.

Designed for direct interfacing between microcontrollers and higher-voltage loads, it supports rail-to-rail input voltage ranges (–20 V to +40 V) and guarantees VO(ON) ≤ 0.3 V (Q1) and ≤ –0.3 V (Q2) at rated output currents, minimizing power loss in driver stages.

Key Specifications

Pinout & Package

Package: SOT353 - 5-pin, surface-mount plastic package with 0.65 mm pitch, UL 94V-0 rating, and moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with NSBC114YDXV6T1G and DTC143ZKAT146, the UMC5N-7 uniquely provides matched NPN+PNP functionality in one SOT353 package, eliminating inter-device timing skew and reducing PCB trace length for critical switching paths.

Availability

UMC5N-7 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC output stages, and consumer appliance interface circuits requiring stable component supply and long-term lifecycle support.

Supply support for UMC5N-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, specializing in high-reliability components for automotive, industrial, and computing markets.

The UMC5N-7 belongs to Diodes' pre-biased transistor product line, engineered specifically for reducing design complexity in digital interface and load-driving applications where space, reliability, and AEC-Q101 compliance are critical.

FAQ

What is the maximum safe operating voltage for the UMC5N-7's input pins?

The absolute maximum input voltage is +40 V for Q1 and –20 V for Q2, as specified in the "Maximum Ratings" table. Exceeding these values risks permanent damage to the internal bias resistors or transistor junctions, even if V_CC remains within limits. These ratings apply at T_A = 25°C and derate linearly above that temperature.

Can the UMC5N-7 replace two separate SOT-23 pre-biased transistors in an existing design?

Yes-its SOT353 footprint replaces two SOT-23 devices while preserving identical electrical behavior for Q1 and Q2 channels. Pin 1–3 replicate a standard NPN pre-biased transistor; Pins 4–5 replicate a PNP version. Layout redesign is required due to different pin spacing (0.65 mm vs. 0.95 mm), but no schematic changes are needed.

Does the UMC5N-7 support 3.3 V logic-level inputs without external level shifting?

Yes-Q1 turns ON reliably with VI ≥ 3 V and Q2 with VI ≤ –2.5 V, making it fully compatible with 3.3 V CMOS outputs. The guaranteed VI(OFF) thresholds (0.5 V for Q1, –0.3 V for Q2) also prevent false triggering from noise or floating inputs in low-voltage systems.

How does the R2/R1 resistor ratio affect switching performance?

The R2/R1 ratio determines base current division and thus saturation depth. For Q1, R2/R1 = 0.8–1.2 ensures consistent β-dependent saturation across process variation; for Q2, R2/R1 = 1.7–2.6 provides stronger base drive to compensate for lower PNP h_FE, guaranteeing VO(ON) ≤ –0.3 V at –10 mA load.