Diodes Incorporated ACX143ZUQ-13R

Overview

ACX143ZUQ-13R from Diodes Incorporated is a small-signal complementary pre-biased dual transistor in SOT363 package, integrating one NPN and one PNP transistor with built-in 4.7kΩ and 47kΩ biasing resistors. It supports ±50V supply voltage, ±100mA output current, and operates across –55°C to +150°C for automotive AEC-Q101 applications including LED driver control and logic-level signal translation.

For engineers reviewing the ACX143ZUQ-13R datasheet, ACX143ZUQ-13R pinout, ACX143ZUQ-13R application, or ACX143ZUQ-13R equivalent, key selection criteria include verified input threshold voltages (±0.5V OFF / ±1.3V ON), guaranteed DC current gain (h_FE ≥ 80), saturation voltage (V_CE(SAT) ≤ ±0.3V at 5mA), thermal resistance (450°C/W), and AEC-Q101 qualification status.

Technical Context

This dual transistor implements complementary switching via two independent pre-biased elements: NPN section (pins 1–3–6) and PNP section (pins 3–4–5), sharing emitter terminal (pin 3). Each section features integrated R₁ = 4.7kΩ and R₂ = 47kΩ base bias network enabling direct logic-level drive without external resistors.

It delivers rail-to-rail compatible operation with V_IN(OFF) ≤ ±0.5V and V_IN(ON) ≥ ±1.3V thresholds, ensuring noise-immune digital interface behavior. The device maintains stable h_FE ≥ 80 and f_T = 250MHz under specified conditions, supporting high-speed switching up to ~10MHz in buffered gate-drive or level-shifting roles.

Key Specifications

Pinout & Package

SOT363 surface-mount package: 6-pin, 2.15mm × 2.10mm × 0.95mm body, matte tin-plated leads, moisture sensitivity level 1, UL 94V-0 rated molding compound.

Key Features

Applications

Equivalent & Alternatives

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

Compared with NSBC114YDXV6T1G and DMMT3904-7-F, ACX143ZUQ-13R uniquely delivers AEC-Q101 compliance, true complementary topology in one package, and guaranteed ±1.3V logic thresholds-making it the only option for space-constrained automotive signal routing where reliability and integration are mandatory.

Availability

ACX143ZUQ-13R is available at Aetrix Electronics and suitable for automotive lighting control, industrial sensor interfaces, microcontroller GPIO expansion, and CAN node power management requiring stable component supply and full AEC-Q101 traceability.

Supply support for ACX143ZUQ-13R 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 ACX series targets automotive-qualified pre-biased transistors for signal routing and interface buffering, emphasizing AEC-Q101 reliability, compact packaging, and simplified board-level integration in safety-critical subsystems.

FAQ

What is the maximum operating temperature for ACX143ZUQ-13R?

The device is rated for junction and storage temperatures from –55°C to +150°C. Its thermal resistance (R_θJA = 450°C/W) requires adherence to the recommended SOT363 pad layout on FR-4 to sustain this range under 270mW power dissipation. Derating begins linearly above +25°C ambient per the datasheet curve.

Does ACX143ZUQ-13R require external biasing resistors?

No. It integrates factory-trimmed 4.7kΩ and 47kΩ base bias resistors for both NPN and PNP sections. These eliminate the need for external components in standard switching configurations, reducing PCB area and assembly steps while ensuring consistent turn-on/turn-off behavior across temperature and process variation.

How does the shared emitter configuration affect circuit design?

Pin 3 serves as the common emitter for both transistors, enabling push-pull or complementary output topologies without floating nodes. This configuration simplifies level-shifting designs but requires careful grounding-especially in mixed-voltage systems-since both sections reference the same emitter potential, limiting independent bias point adjustment.

Is ACX143ZUQ-13R suitable for high-frequency switching applications?

Yes. With a gain-bandwidth product (f_T) of 250MHz and typical switching times in the nanosecond range, it supports digital signal conditioning up to ~10MHz. However, its 450°C/W thermal resistance and 270mW power limit constrain sustained high-frequency operation at full current; pulsed duty cycles below 50% are recommended for >5MHz use.