Diodes Incorporated DDTA144TUA-7-F

Overview

DDTA144TUA-7-F from Diodes Incorporated is a PNP pre-biased transistor with single built-in bias resistor (R1 = 47 kΩ), SOT323 package, V_CEO = −50 V, I_C(max) = −100 mA, and h_FE = 100–600. It functions as a compact, surface-mount digital switch in low-power logic interface and signal-level control circuits.

For engineers reviewing the DDTA144TUA-7-F datasheet, DDTA144TUA-7-F pinout, DDTA144TUA-7-F application, or DDTA144TUA-7-F equivalent, key selection criteria include R1 tolerance (±30%), V_CE(sat) ≤ −0.3 V at I_C/I_B = −1 mA/−0.1 mA, thermal resistance (R_θJA = 625 °C/W), and AEC-Q101 readiness for automotive signal conditioning.

Technical Context

This device integrates a PNP bipolar junction transistor with a single external-base biasing resistor (R1 only, no R2), enabling simplified on/off switching without discrete base resistors. Its epitaxial planar die construction ensures stable gain and low leakage across −55 °C to +150 °C operating range.

The SOT323 package supports high-density PCB layouts and meets J-STD-020 moisture sensitivity Level 1. Electrical behavior is characterized under standardized test conditions: h_FE measured at I_C = −1 mA, V_CE = −5 V; V_CE(sat) specified at I_C/I_B = −1 mA/−0.1 mA.

Key Specifications

Pinout & Package

Package: SOT323 - ultra-small plastic surface-mount 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 DDTA144TUA-7-F, DDTA144W-7-F offers tighter h_FE distribution for robust low-current drive, while NSVDDTA144T1H adds PPAP-ready documentation for automotive production-neither is pin-compatible with NPN alternatives like DDTC144 series.

Availability

DDTA144TUA-7-F is available at Aetrix Electronics and suitable for automotive door modules, industrial PLC input stages, consumer appliance backlights, and medical diagnostic interfaces requiring stable component supply and long-term manufacturability.

Supply support for DDTA144TUA-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, specializing in high-reliability components for automotive, industrial, and computing markets.

This part belongs to the DDTA R1-only pre-biased transistor product line, designed specifically to replace discrete BJT + resistor combinations in cost- and space-constrained digital switching applications.

FAQ

What is the function of the internal resistor R1 in DDTA144TUA-7-F?

R1 is a 47 kΩ ±30% resistor connected between the base and emitter terminals. It provides fixed base biasing to enable predictable turn-on behavior with a single external control signal-eliminating the need for an external base resistor in standard digital switching configurations.

Can DDTA144TUA-7-F be used in place of a standard PNP BJT like BC807?

Yes, but only when the circuit design accounts for its integrated R1. Unlike BC807, DDTA144TUA-7-F cannot operate in linear amplifier mode due to the fixed bias network; it is optimized for saturated switching with logic-level drive, not analog gain control.

Is DDTA144TUA-7-F qualified for automotive use?

It is manufactured in IATF 16949 certified facilities and supports AEC-Q101 qualification upon request. While the standard part is not pre-certified, Diodes provides PPAP-capable documentation and change control for automotive programs requiring formal qualification.

What is the maximum operating temperature for continuous use?

The device is rated for junction temperatures from −55 °C to +150 °C. For continuous operation at ambient temperatures above +85 °C, derating per Figure 1 is required: power dissipation must be reduced linearly from 200 mW at +25 °C to zero at +150 °C.