Diodes Incorporated DDA144EH-7

Overview

DDA144EH-7 from Diodes Incorporated is a PNP pre-biased dual small-signal transistor in SOT563 package, featuring integrated 47kΩ and 47kΩ bias resistors (R1 = R2 = 47kΩ), −50V V_CBO/V_CEO, −30mA I_O, and AEC-Q101 qualification for automotive reliability. It operates as a dual-channel logic-level switch in low-power digital interface circuits.

For engineers reviewing the DDA144EH-7 datasheet, DDA144EH-7 pinout, DDA144EH-7 application, or DDA144EH-7 equivalent, key selection criteria include verified input voltage thresholds (V_L(OFF) = −0.5V, V_L(ON) = −1.9V at I_O = −5mA), guaranteed h_FE range (100–600), thermal resistance (833°C/W), and AEC-Q101 compliance for under-hood signal conditioning.

Technical Context

This device integrates two identical PNP transistors with monolithic bias networks-each channel includes two 47kΩ resistors connected between base-emitter and base-collector-enabling direct TTL/CMOS-compatible switching without external bias components. It supports rail-to-rail input operation from −40V to +10V and delivers −30mA output current per channel.

Designed for high-reliability automotive environments, it meets AEC-Q101 stress testing requirements including temperature cycling, HTRB, and ESD (HBM ≥2kV). Its SOT563 package provides six terminals with shared emitter configuration (pins 1&4 = emitters, pins 2&5 = collectors, pins 3&6 = bases), enabling compact dual-gate logic buffering.

Key Specifications

Pinout & Package

SOT563 surface-mount package: 1.6mm × 1.2mm × 0.5mm body, matte tin-plated copper leadframe, 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 PNP pre-biased dual transistor applications.

Compared with DDA144EU-7 and NSVD144EH-7, DDA144EH-7 offers optimal thermal performance in minimal area (SOT563), guaranteed h_FE ≥100, and lowest V_CE(SAT), making it preferred for new automotive and industrial designs demanding density and consistency.

Availability

DDA144EH-7 is available at Aetrix Electronics and suitable for automotive body control modules, industrial programmable logic controllers, and USB power management systems requiring stable component supply and AEC-Q101 assurance.

Supply support for DDA144EH-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 centers across Asia and manufacturing in China, Taiwan, and the US.

The DDA series targets automotive and industrial signal conditioning, delivering pre-biased transistors optimized for AEC-Q101 compliance, space-constrained PCBs, and simplified digital interface design.

FAQ

What is the maximum operating temperature for DDA144EH-7?

The DDA144EH-7 is rated for junction and storage temperatures from −55°C to +150°C. Its thermal resistance (R_θJA = 833°C/W) means that at 150mW dissipation on FR4, the junction rise is ~125°C above ambient-so continuous operation is safe up to +25°C ambient if no additional heatsinking is used. Derating begins linearly above +25°C.

Can DDA144EH-7 replace discrete PNP transistors plus bias resistors?

Yes-DDA144EH-7 directly replaces two discrete PNP transistors and four external bias resistors (two per channel). Its internal 47kΩ R1/R2 network matches typical TTL/CMOS drive requirements, reducing layout complexity and improving channel matching versus discrete solutions.

Is DDA144EH-7 pin-compatible with other DDA-series devices in SOT563?

No-while all DDA(xxxx)H devices use SOT563, pin functions differ across variants due to varying R1/R2 values and internal configurations. For example, DDA143EH-7 uses 4.7kΩ/4.7kΩ resistors and different V_L(ON) thresholds; substituting without circuit review risks incorrect biasing or saturation.

Does DDA144EH-7 support bidirectional signal translation?

No-it is a unidirectional PNP switch configured for active-low, high-side load control. Its architecture does not support reverse current flow or level-shifting from low-voltage to high-voltage domains; it only sinks current from V_CC through the collector to ground when the base is pulled low relative to emitter.