Diodes Incorporated DDTA114TUA-7

Overview

DDTA114TUA-7 from Diodes Incorporated is a PNP pre-biased transistor in SOT323 package with integrated 10 kΩ base bias resistor (R1 only), V_CEO = −50 V, I_C(max) = −100 mA, V_CE(sat) = −0.3 V at I_C/I_B = −5 mA/−0.5 mA, and h_FE = 100–600. It serves as a compact, RoHS-compliant switching element in low-power digital interface and signal-level control circuits.

For engineers reviewing the DDTA114TUA-7 datasheet, DDTA114TUA-7 pinout, DDTA114TUA-7 application, or DDTA114TUA-7 equivalent, key selection criteria include verified R1-only biasing topology, guaranteed V_CE(sat) under defined I_C/I_B conditions, SOT323 thermal resistance (R_θJA = 625 °C/W), and AEC-Q101 readiness for automotive-grade designs.

Technical Context

This device implements a monolithic PNP bipolar junction transistor with a single built-in base-emitter pull-up resistor (R1 = 10 kΩ ±30%), eliminating external bias components. Its epitaxial planar die construction ensures stable h_FE across temperature (−55 °C to +150 °C) and supports fast switching via f_T = 250 MHz at V_CE = −10 V, I_E = −5 mA.

The SOT323 package enables high-density PCB layouts while maintaining 200 mW power dissipation capability on FR4 boards with minimum pad layout. It is not complementary to NPN DDTC series devices but shares identical mechanical and thermal specifications.

Key Specifications

Pinout & Package

Package: SOT323 - ultra-small surface-mount plastic package (2.15 mm × 2.10 mm × 0.95 mm), moisture sensitivity level 1, matte tin-plated leads, weight ≈ 0.006 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DDTA114YCA-7, the DDTA114TUA-7 offers superior board-area efficiency and identical electrical specs in a smaller SOT323 package; versus NSV114T1T1G, it delivers tighter h_FE lower bound and lower V_CE(sat), improving noise margin and conduction efficiency in logic-switching roles.

Availability

DDTA114TUA-7 is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller GPIO expansion, and power rail enable switching requiring stable component supply, automotive-grade traceability, and RoHS 3 compliance.

Supply support for DDTA114TUA-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 DDTA (R1-only series) product line targets cost-sensitive, space-constrained digital interface and switching applications where integrated biasing simplifies design, improves reliability, and accelerates time-to-market for consumer, industrial, and automotive electronics.

FAQ

What is the function of the built-in resistor in DDTA114TUA-7?

The built-in 10 kΩ resistor (R1) connects internally between base and emitter, forming a fixed-base-bias network. This eliminates the need for an external resistor when using the device as a saturated switch, reducing component count and PCB area while ensuring consistent turn-on behavior across temperature and process variation.

Can DDTA114TUA-7 be used in automotive applications?

Yes - DDTA114TUA-7 is manufactured in IATF 16949 certified facilities and supports PPAP documentation. While not pre-qualified to AEC-Q101 out-of-box, Diodes Incorporated confirms it meets the stress test requirements for AEC-Q101 when processed through their qualified automotive flow, making it suitable for automotive body electronics and infotainment subsystems.

How does the SOT323 package affect thermal performance?

The SOT323 package has a thermal resistance of R_θJA = 625 °C/W on FR4 with minimum recommended pad layout. This means a 200 mW power dissipation results in ~125 °C junction-to-ambient rise above ambient. For continuous operation near rated power, use enhanced copper pour or reduce duty cycle to maintain T_J ≤ 150 °C.

Is there a complementary NPN version of DDTA114TUA-7?

No - DDTA114TUA-7 is a PNP-only device with R1-only biasing. The complementary NPN series is DDTC, but no DDTC part shares the exact 10 kΩ R1 value. DDTC114TUA-7 has R1 = 10 kΩ, but it is a separate product with distinct marking and ordering code; verify full part number and datasheet before substitution.