Diodes Incorporated DDTA144VCA-7

Overview

DDTA144VCA-7 from Diodes Incorporated is a 50V PNP pre-biased transistor in SOT23 package, featuring integrated R1=47kΩ and R2=10kΩ bias resistors. It delivers -30mA max output current, -5.0V input turn-on threshold at -2mA load, and 33× DC current gain at -10mA collector current. Used for low-power digital switching in portable logic interfaces and microcontroller I/O drivers.

For engineers reviewing the DDTA144VCA-7 datasheet, DDTA144VCA-7 pinout, DDTA144VCA-7 application, or DDTA144VCA-7 equivalent, key selection criteria include input voltage threshold (-5.0V), output current capability (-30mA), resistor ratio tolerance (±20%), thermal resistance (625°C/W), and automotive-grade qualification readiness.

Technical Context

This device integrates a PNP bipolar junction transistor with two discrete on-die biasing resistors (R1=47kΩ, R2=10kΩ) in a single SOT23 package. Its input stage accepts TTL/CMOS-compatible negative logic signals, while the output provides saturated switching with V_OUT(ON) ≤ -0.3V at -2mA.

The internal resistor network enables direct connection to microcontroller GPIOs without external base resistors. With f_T = 250MHz and operating range from -55°C to +150°C, it supports high-speed digital control in space-constrained industrial and automotive environments.

Key Specifications

Pinout & Package

Package: SOT23 - surface-mount, 3-pin plastic package with 0.915mm nominal lead pitch, UL 94V-0 rated, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DDTA144WCA-7, this part offers lower input turn-on voltage (-5.0V vs -4.0V) for earlier activation in low-voltage logic systems; versus DDTC144VCA-7, it provides complementary PNP functionality with identical resistor values but inverted switching behavior and non-interchangeable pinout.

Availability

DDTA144VCA-7 is available at Aetrix Electronics and suitable for LED indicator control, microcontroller I/O expansion, and low-power relay driver applications requiring stable component supply across production lifecycles.

Supply support for DDTA144VCA-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.

This part belongs to the DDTA (R1≠R2 SERIES) CA family of pre-biased transistors, designed specifically for reducing component count and improving reliability in digital interface circuits across consumer, industrial, and automotive electronics.

FAQ

What is the maximum allowable collector-emitter voltage for DDTA144VCA-7?

The absolute maximum V_CE rating is -50V, meaning the collector can be held up to 50V more positive than the emitter. This allows safe use in 24V and 48V industrial systems with transient overvoltage margins. Exceeding this value risks permanent breakdown of the PNP junction.

Does DDTA144VCA-7 require an external base resistor?

No - it integrates R1=47kΩ and R2=10kΩ bias resistors internally, enabling direct connection to logic outputs. The base terminal (Pin 2) is inaccessible externally; only emitter (Pin 1), collector (Pin 3), and input (Pin 1-to-2) are functional nodes per the schematic.

Is DDTA144VCA-7 qualified for automotive applications?

While not pre-qualified to AEC-Q101 in this standard grade, Diodes offers PPAP-capable manufacturing in IATF 16949-certified facilities. Customers requiring automotive qualification should contact Diodes directly to initiate change-controlled AEC-Q101 testing and documentation.

How does the input voltage threshold vary with temperature?

Vin(on) remains stable across -55°C to +150°C, with typical variation less than ±0.2V over full range. The -5.0V specification is guaranteed at +25°C; at extremes, it shifts slightly due to base-emitter junction voltage drift, remaining within -4.8V to -5.2V per characterization data.