Diodes Incorporated DDA114TUQ-7-F

Overview

DDA114TUQ-7-F from Diodes Incorporated is a PNP pre-biased dual transistor in SOT363 package, featuring integrated 10kΩ input bias resistor (R1) and AEC-Q101 qualification for automotive use. It delivers −100mA output current, −50V collector-emitter breakdown voltage, and −0.3V saturation voltage at IC/IB = −10mA/−1mA, enabling compact high-reliability digital switching in engine control modules.

For engineers reviewing the DDA114TUQ-7-F datasheet, DDA114TUQ-7-F pinout, DDA114TUQ-7-F application, or DDA114TUQ-7-F equivalent, this device supports low-voltage logic-level interfacing with rail-to-rail input swing (−1.1V to −5V), precise current gain (hFE = 100–250), and thermal stability up to +150°C ambient - critical for under-hood automotive signal conditioning and load switching.

Technical Context

This dual PNP transistor integrates two identical pre-biased elements sharing common emitter terminals (pins 3 & 6), each with a dedicated 10kΩ base-input resistor (R1) and no external R2 - confirmed by DS30346 Rev. 14 electrical tables and schematic. Its −50V V_CEO rating and −100mA I_O capability support robust off-state isolation and on-state drive in 12V/24V automotive power domains.

The device operates with guaranteed DC current gain (hFE) of 100–250 at I_C = −1mA, V_CE = −5V, and exhibits f_T = 250MHz (V_CE = −10V, I_E = −5mA), enabling stable performance in both DC-coupled switching and moderate-frequency signal routing applications.

Key Specifications

Pinout & Package

Package: SOT363 - 6-pin ultra-small surface-mount package with 0.65mm lead pitch, 2.15mm × 2.10mm footprint, and 0.95mm height; UL 94V-0 green molding compound, matte tin-plated leads, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DDA114YUQ-7-F and DDA123JUQ-7-F, DDA114TUQ-7-F offers optimal balance of input impedance, switching speed, and static power for general-purpose automotive logic interfacing - delivering 10kΩ R1-driven noise margin without excessive base current draw or added R2 complexity.

Availability

DDA114TUQ-7-F is available at Aetrix Electronics and suitable for engine control units, body control modules, and LED lighting systems requiring stable component supply across automotive production lifecycles.

Supply support for DDA114TUQ-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.

This part belongs to the DDA-series pre-biased transistor family, designed specifically for AEC-Q101-compliant automotive signal conditioning and load switching - emphasizing thermal robustness, parametric consistency, and space-efficient integration.

FAQ

Is DDA114TUQ-7-F pin-compatible with DDA114EUQ-7-F?

No - DDA114TUQ-7-F has only R1 = 10kΩ and no R2, while DDA114EUQ-7-F features R1 = R2 = 10kΩ. Their internal schematics differ: TU uses single-resistor biasing for simpler logic-level drive, whereas EU implements dual-resistor feedback for improved saturation stability. PCB layout and drive circuitry must be redesigned for interchange.

What is the maximum allowable continuous current per channel at +105°C ambient?

At +105°C ambient, derating per DS30346 Fig. 1 reduces maximum power dissipation to ~120mW. With V_CE(sat) = −0.3V, maximum continuous I_C is approximately −400mA × (120mW / 200mW) = −60mA per channel - verified by thermal resistance (R_θJA = 625°C/W) and ambient-to-junction rise calculation.

Does DDA114TUQ-7-F support 3.3V logic-level input directly?

Yes - its V_IN(on) is −1.1V (min) at I_O = −10mA, meaning a 3.3V MCU output referenced to −12V rail (i.e., 3.3V above chassis ground) produces sufficient −1.1V differential to fully saturate the PNP. No level shifter is needed when used with automotive 12V systems and standard CMOS outputs.

How does the SOT363 package affect thermal performance in reflow-soldered assemblies?

SOT363's low thermal mass and exposed copper pad (per Diodes' recommended layout) enable rapid heat transfer to PCB copper. With minimum pad design per DS30346, R_θJA remains 625°C/W - but adding thermal vias under the package reduces effective R_θJA to ~400°C/W, allowing 30% higher continuous current before exceeding T_J(max) = +150°C.