Diodes Incorporated DDTA144VUA-7-F

Overview

DDTA144VUA-7-F from Diodes Incorporated is a PNP pre-biased small-signal transistor in SOT-323 package, featuring integrated bias resistors R1 = 47 kΩ and R2 = 10 kΩ (R1 ≠ R2), −40 V V_CEO, −30 mA I_O(max), and DC current gain (G_L) of −33 at V_CE = −10 V, I_C = −10 mA. It serves as a logic-level interface switch in low-power digital control circuits.

For engineers reviewing the DDTA144VUA-7-F datasheet, DDTA144VUA-7-F pinout, DDTA144VUA-7-F application, or DDTA144VUA-7-F equivalent, key selection criteria include input voltage thresholds (V_IN(on) = −3.0 V, V_IN(off) = −1.0 V), output saturation voltage (V_O(on) = −0.1 V), resistor tolerance (±30% for R1), and thermal resistance (R_θJA = 625 °C/W).

Technical Context

This device integrates a PNP bipolar junction transistor with two discrete on-die biasing resistors (R1 = 47 kΩ, R2 = 10 kΩ) configured in a standard single-resistor-feedback topology - not emitter-follower or voltage-divider bias. Its input terminal connects to the base through R1, while R2 ties base to emitter, enabling direct TTL/CMOS-compatible switching without external bias components.

Designed for unidirectional level translation and active-low switching, it operates with V_CC up to −50 V and supports output currents up to −30 mA under specified V_IN conditions. The −25 °C to +150 °C operating range and J-STD-020C Level 1 moisture sensitivity confirm suitability for industrial ambient environments.

Key Specifications

Pinout & Package

Package: SOT-323 - ultra-small surface-mount plastic package (2.00–2.20 mm length, 1.15–1.35 mm width, 0.25–0.40 mm thickness), RoHS-compliant, matte tin-plated leads, UL 94V-0 rated.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DDTA144WUA-7-F and DDTA124XUA-7-F, DDTA144VUA-7-F delivers optimal balance of −3.0 V logic compatibility, −33 gain stability, and −30 mA drive-making it ideal for general-purpose 3.3 V microcontroller interfacing where moderate speed and strong noise rejection are both required.

Availability

DDTA144VUA-7-F is available at Aetrix Electronics and suitable for industrial sensor interface, automotive body control modules, and consumer appliance power sequencing requiring stable component supply and long-lifecycle sourcing.

Supply support for DDTA144VUA-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≠R2 Series) UA family of pre-biased PNP transistors, engineered specifically for space-constrained, high-reliability digital interface applications where simplified biasing and guaranteed switching thresholds reduce design risk.

FAQ

What is the maximum operating temperature for DDTA144VUA-7-F?

The DDTA144VUA-7-F has an operating junction temperature range of −55 °C to +150 °C, verified per datasheet DS30326 Rev. 7–2. Its thermal resistance R_θJA is 625 °C/W on FR4 with recommended pad layout AP02001, meaning derating begins above 25 °C ambient to maintain T_J ≤ 150 °C at full 200 mW dissipation.

Can DDTA144VUA-7-F replace a standard PNP transistor with external bias resistors?

Yes - DDTA144VUA-7-F replaces discrete PNP transistors plus two external bias resistors (R1 = 47 kΩ, R2 = 10 kΩ) in inverter or switch configurations. Its internal R1–R2 network is laser-trimmed and matched, eliminating resistor placement error and improving production yield versus discrete solutions.

Is DDTA144VUA-7-F lead-free and RoHS compliant?

Yes - DDTA144VUA-7-F is lead-free and RoHS compliant per Note 1 in DS30326, with matte tin plating over Alloy 42 leadframe and green molding compound meeting halogen-free standards (Date Code 0627 and newer). It satisfies JEDEC J-STD-020C Level 1 moisture sensitivity requirements.

What does the "V" in DDTA144VUA signify?

The "V" is the type code assigned by Diodes Incorporated to uniquely identify this variant within the DDTA (R1≠R2 Series) UA family. Per datasheet Table on Page 1, DDTA144VUA corresponds to R1 = 47 kΩ and R2 = 10 kΩ, distinguishing it from DDTA144WUA (R2 = 22 kΩ) and other members of the series.