Diodes Incorporated ADTA114ECAQ-7

Overview

ADTA114ECAQ-7 from Diodes Incorporated is a PNP pre-biased small-signal transistor in SOT23 package, featuring integrated bias resistors (R1 = R2 = 10 kΩ), AEC-Q101 qualification, and −50 V V_CC rating. It delivers DC current gain (h_FE) ≥30 at I_C = −5 mA, V_CE = −5 V, and supports automotive signal switching with −0.1 V typical V_CE(sat) at I_C/I_B = −10 mA/−0.5 mA.

For engineers reviewing the ADTA114ECAQ-7 datasheet, ADTA114ECAQ-7 pinout, ADTA114ECAQ-7 application, or ADTA114ECAQ-7 equivalent, key selection criteria include its built-in resistor matching (±20% R2/R1 tolerance), −1.1 V typical V_IN(OFF), −1.9 V typical V_IN(ON), 310 mW power dissipation on FR-4, and automotive-grade reliability per AEC-Q101.

Technical Context

This device integrates two matched 10 kΩ bias resistors to configure a single-transistor inverter with defined turn-on/turn-off thresholds. Its PNP topology enables high-side switching in low-voltage logic interfaces, with guaranteed operation from −40 V to +10 V input voltage range and −55 °C to +150 °C junction temperature.

The transistor exhibits 250 MHz f_T (V_CE = −10 V, I_E = −5 mA), supporting moderate-speed digital switching. Its SOT23 package provides thermal resistance of 403 °C/W (junction-to-ambient) on minimum-copper FR-4, enabling stable operation up to 150 °C ambient when derated per published curves.

Key Specifications

Pinout & Package

SOT23 plastic surface-mount package with matte tin-plated leads, UL 94V-0 flammability rating, and moisture sensitivity level 1 per J-STD-020. Weight: 0.008 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with NSV114ECAQ-7 and DDTA114ECA-7, ADTA114ECAQ-7 uniquely combines AEC-Q101 qualification, halogen-free packaging, and full PPAP capability-making it the sole choice for Tier-1 automotive subsystems requiring audit-ready documentation and extended temperature reliability.

Availability

ADTA114ECAQ-7 is available at Aetrix Electronics and suitable for automotive lighting control, industrial PLC input interfaces, and medical diagnostic equipment power sequencing requiring stable component supply and long-term lifecycle assurance.

Supply support for ADTA114ECAQ-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 ADTA114ECAQ-7 belongs to Diodes' Automotive-Grade Pre-Biased Transistor (PBT) product line, engineered specifically for space-constrained, high-reliability signal switching in vehicle body electronics and power management systems.

FAQ

What is the function of Pin 2 (Base) in the ADTA114ECAQ-7?

Pin 2 is the internal node connecting the two 10 kΩ bias resistors (R1 and R2). It serves as the control input terminal: applying a negative voltage ≤ −3 V relative to emitter (Pin 1) turns the PNP transistor fully ON, while voltages ≥ −0.5 V ensure OFF-state operation. No external base connection is required.

Does ADTA114ECAQ-7 support 5 V logic interfacing?

Yes - with V_CC = −5 V, the device guarantees turn-ON when input (Pin 2) is ≤ −3 V and turn-OFF when ≥ −0.5 V. This allows direct interfacing with standard 5 V CMOS outputs referenced to the same negative rail, achieving clean logic inversion without level shifters.

How does the R1 = R2 configuration affect switching performance?

The matched 10 kΩ resistors establish a fixed base bias ratio that ensures predictable V_IN(ON) and V_IN(OFF) thresholds across temperature and process variation. This eliminates hysteresis tuning and improves noise immunity compared to single-resistor biased transistors.

Is thermal derating required for continuous operation at 125 °C ambient?

Yes - at 125 °C ambient, the maximum allowable power dissipation drops to approximately 180 mW per the published derating curve. For 310 mW operation, ambient must be ≤ 85 °C on minimum-copper FR-4; PCB copper area expansion improves thermal margin significantly.