Diodes Incorporated DDTA144TE-7-F

Overview

DDTA144TE-7-F from Diodes Incorporated is a PNP pre-biased transistor in SOT523 package with built-in 47 kΩ base bias resistor (R1 only), V_CEO = −50 V, I_C = −100 mA peak, V_CE(sat) = −0.3 V at I_C/I_B = −1 mA/−0.1 mA, and h_FE = 100–600. It enables compact, reliable digital switching in space-constrained logic interface and load control circuits.

For engineers reviewing the DDTA144TE-7-F datasheet, DDTA144TE-7-F pinout, DDTA144TE-7-F application, or DDTA144TE-7-F equivalent, key selection criteria include verified R1-only biasing topology, guaranteed saturation under low-base-drive conditions, SOT523 thermal performance (R_θJA = 833 °C/W), and automotive-grade process qualification readiness.

Technical Context

This device integrates a single PNP bipolar junction transistor with an on-die 47 kΩ base-emitter pull-up resistor (R1), eliminating external bias components. It operates as a digital switch with defined turn-on threshold and predictable saturation behavior under pulsed or DC drive.

Designed for low-power, high-density logic-level translation, it supports rail-to-rail input compatibility down to 0.2 V and delivers stable h_FE across −1 mA collector current at V_CE = −5 V, with f_T = 250 MHz enabling fast edge response in signal routing applications.

Key Specifications

Pinout & Package

Package: SOT523 - ultra-small surface-mount plastic package (1.60 mm × 1.60 mm × 0.50 mm), moisture sensitivity level 1, matte tin-plated leads, weight ≈ 0.002 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DDTA144W-7-F, DDTA144TE-7-F saves >60% board area with only +34% R_θJA; versus NSV144T1G, it guarantees higher minimum gain and lower saturation voltage-critical for low-voltage GPIO drive and precision load switching.

Availability

DDTA144TE-7-F is available at Aetrix Electronics and suitable for LED indicator control, microcontroller GPIO expansion, and industrial sensor interface applications requiring stable component supply and long-term production continuity.

Supply support for DDTA144TE-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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.

This part belongs to the DDTA R1-Only Series of pre-biased transistors, designed specifically to simplify digital switching in space- and cost-constrained applications by integrating critical biasing resistors directly into the die.

FAQ

What is the function of the internal 47 kΩ resistor in DDTA144TE-7-F?

The internal 47 kΩ resistor connects the base to the emitter (R1-only configuration), providing automatic biasing that allows direct connection to CMOS/TTL logic outputs. It sets the base current to approximately 10 µA when driven with a 0.5 V input offset, enabling reliable saturation without external components or layout-dependent resistor tolerances.

Can DDTA144TE-7-F be used in automotive applications?

Yes-DDTA144TE-7-F is manufactured in IATF 16949-certified facilities and supports PPAP documentation. While not pre-qualified to AEC-Q101, its process flow and test coverage align with automotive change-control requirements; qualification testing can be initiated upon customer request with Diodes Incorporated's automotive team.

How does the SOT523 package affect thermal performance?

The SOT523 package has a thermal resistance of 833 °C/W (junction-to-ambient) on a 15 mm × 15 mm × 0.6 mm FR4 board with 1 oz copper. This limits continuous power dissipation to ~150 mW at +25 °C ambient; designers must apply derating above +25 °C using the published curve or implement local copper pour to improve heat spreading.

Is there a complementary NPN version of this device?

Yes-the DDTC144TE-7-F is the complementary NPN pre-biased transistor with identical 47 kΩ R1 resistor, SOT523 package, and matching electrical specifications (V_CEO = 50 V, I_C = 100 mA, V_CE(sat) ≤ 0.3 V), enabling balanced push-pull or dual-rail switching topologies.