Diodes Incorporated DCX114YK-7-F

Overview

DCX114YK-7-F from Diodes Incorporated is a dual complementary pre-biased transistor in SOT26 package, integrating one NPN and one PNP BJT with built-in bias resistors (R1 = 10 kΩ, R2 = 47 kΩ). It supports ±50 V supply voltage, delivers ±70 mA output current per section, and operates across –55 °C to +150 °C for automotive and industrial switching applications.

For engineers reviewing the DCX114YK-7-F datasheet, DCX114YK-7-F pinout, DCX114YK-7-F application, or DCX114YK-7-F equivalent, key selection criteria include input voltage thresholds (V_I(OFF) = ±0.3 V, V_I(ON) = ±1.9 V), output saturation voltage (V_CE(sat) ≤ ±0.3 V), DC current gain (h_FE = 100–600), and resistor tolerance (±30% on R1, ±20% on R2/R1 ratio).

Technical Context

This device implements a dual-channel, complementary pre-biased transistor topology with independent NPN and PNP sections sharing common emitter terminals. Each section integrates two monolithic resistors (R1 and R2) for fixed-base biasing, eliminating external components in digital logic interface and level-shifting circuits.

It operates with symmetrical maximum ratings: ±50 V V_CC, ±100 mA I_C(MAX), and 300 mW total power dissipation. Thermal resistance is 417 °C/W (junction-to-ambient), validated on FR-4 PCB with minimum pad layout, supporting high-reliability operation in extended temperature environments.

Key Specifications

Pinout & Package

SOT26 surface-mount package: 6-pin, lead-free, halogen-free, UL 94V-0 molded plastic case weighing 0.016 g. Compatible with standard reflow profiles and automated assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DCX114YK-7-F, DCX124EK-7-F trades output current headroom for improved resistor matching, while DCX123JK-7 offers greater drive capability at the cost of reduced input threshold margin-making DCX114YK-7-F the balanced choice for general-purpose 3.3/5 V digital interface tasks.

Availability

DCX114YK-7-F is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O modules, and consumer appliance control panels requiring stable component supply and long-term lifecycle support.

Supply support for DCX114YK-7-F 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 DCX series targets compact, high-yield digital interface solutions-designed specifically to replace discrete transistor-resistor combinations in space-constrained, cost-sensitive switching applications.

FAQ

What is the function of the internal R1 and R2 resistors in DCX114YK-7-F?

The internal R1 (10 kΩ) and R2 (47 kΩ) resistors provide fixed base biasing for both NPN and PNP transistors, enabling direct connection to CMOS/TTL logic without external components. R1 connects the input pin to base, while R2 pulls base to emitter-setting predictable V_I(ON) ≈ ±1.9 V and ensuring reliable saturation at specified I_O.

Can DCX114YK-7-F be used in automotive applications?

Yes-DCX114YK-7-F is manufactured in IATF 16949-certified facilities and supports PPAP documentation. Though not formally AEC-Q101 qualified, its –55 °C to +150 °C operating range, ±50 V breakdown rating, and green compliance align with automotive subsystem requirements such as door modules and lighting controls.

How does the SOT26 pinout differ between NPN and PNP sections?

In SOT26, Pins 1–3 serve the NPN section (Emitter–Base–Collector), while Pins 4–6 serve the PNP section (Emitter–Base–Collector), with no shared pins. This allows independent control of both transistors-e.g., Pin 2 drives NPN base, Pin 5 drives PNP base-enabling push-pull or complementary switching topologies without cross-talk.

What is the thermal derating behavior above 25 °C ambient?

With R_θJA = 417 °C/W on FR-4 PCB, power dissipation must be linearly derated above 25 °C: PD drops by 0.72 mW/°C. At 85 °C ambient, max allowable PD is ~258 mW; at 125 °C, it falls to ~186 mW-still sufficient for 70 mA switching at V_CE(sat) ≤ 0.3 V (21 mW per section).