Diodes Incorporated DDTA144TE-7

Overview

DDTA144TE-7 from Diodes Incorporated is a PNP pre-biased transistor in SOT523 package with integrated 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 switching in low-power logic interface and signal inversion circuits.

For engineers reviewing the DDTA144TE-7 datasheet, DDTA144TE-7 pinout, DDTA144TE-7 application, or DDTA144TE-7 equivalent, key selection criteria include its single R1 bias configuration, guaranteed saturation voltage under defined drive conditions, thermal derating behavior on FR4, and compatibility with 1.6 mm × 1.6 mm board space constraints.

Technical Context

This device implements a monolithic PNP bipolar junction transistor with an on-die 47 kΩ base-emitter pull-up resistor (R1), eliminating external bias components for simple inverter or level-shifting functions. It operates as a saturated switch-not a linear amplifier-with guaranteed V_CE(sat) ≤ −0.3 V when driven with I_B = −0.1 mA and I_C = −1 mA.

The SOT523 package supports high-density placement and has a thermal resistance of 833 °C/W on 15 mm × 15 mm × 0.6 mm FR4 with 1 oz copper. Its −55 °C to +150 °C operating range and AEC-Q101 qualification readiness suit industrial and automotive signal conditioning applications.

Key Specifications

Pinout & Package

Package: SOT523 - ultra-small surface-mount plastic package (1.60 mm × 1.60 mm × 0.75 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 DDTA124TE-7-F and DDTA114TE-7-F, DDTA144TE-7 provides higher input impedance and lower quiescent base current-ideal for battery-powered systems and noise-sensitive analog-adjacent logic paths where leakage and EMI susceptibility must be minimized.

Availability

DDTA144TE-7 is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, and IoT edge node logic translation requiring stable component supply and long-term lifecycle support.

Supply support for DDTA144TE-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 series targets cost-sensitive, space-constrained digital interface applications-delivering pre-biased transistors optimized for logic inversion, level shifting, and GPIO expansion in consumer, industrial, and automotive electronics.

FAQ

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

The internal 47 kΩ resistor connects between base and emitter (R1-only configuration), providing automatic biasing to turn the PNP transistor ON when the base is pulled low relative to the emitter. It eliminates the need for an external pull-up resistor, simplifying circuit design and reducing component count in inverter and switch applications.

Can DDTA144TE-7 replace a standard PNP BJT like BC807 in existing designs?

No-DDTA144TE-7 is not a drop-in replacement for discrete BJTs such as BC807 because it lacks a standalone base terminal; the internal R1 ties base to emitter. It replaces both the transistor and its external bias resistor, so redesign is required to remove the external resistor and verify drive strength and saturation behavior under actual load conditions.

Is DDTA144TE-7 qualified for automotive use?

DDTA144TE-7 is manufactured in IATF 16949-certified facilities and supports PPAP documentation. While not pre-qualified to AEC-Q101, Diodes offers AEC-Q101-qualified variants in the same DDTA family (e.g., DDTA144W-7-F). Customers requiring automotive qualification should contact Diodes directly for certified part numbers and test reports.

How does thermal performance change when mounted on smaller PCB copper areas?

The published R_θJA of 833 °C/W assumes a 15 mm × 15 mm × 0.6 mm FR4 board with full 1 oz copper coverage. On smaller pads or reduced copper, R_θJA increases significantly-derating curves show power dissipation drops to ~75 mW at +85 °C ambient on minimal copper. Layout must follow Diodes' recommended pad dimensions (C = 1.29 × 0.40 mm) for specified thermal performance.