Diodes Incorporated DDTA144GUA-7-F

Overview

DDTA144GUA-7-F from Diodes Incorporated is a PNP pre-biased small-signal transistor with single built-in bias resistor R2 = 47 kΩ, rated for -50 V V_CEO, -100 mA I_C, and 200 mW power dissipation in SOT-323 package; used in compact logic-level switching and signal inversion circuits in portable consumer electronics.

For engineers reviewing the DDTA144GUA-7-F datasheet, DDTA144GUA-7-F pinout, DDTA144GUA-7-F application, or DDTA144GUA-7-F equivalent, key selection criteria include verified R2-only biasing topology, h_FE = 68 at I_C = -5 mA/V_CE = -5 V, V_CE(sat) ≤ -0.3 V at I_C = -10 mA/I_B = -0.5 mA, ESD robustness per JESD22-A114, and SOT-323 thermal performance (R_θJA = 625 °C/W).

Technical Context

This device implements a monolithic PNP bipolar junction transistor with an integrated 47 kΩ base-emitter pull-up resistor (R2 only), eliminating external bias components. It operates as a digital switch or level translator with guaranteed saturation under defined I_B/I_C conditions and supports DC-coupled input drive.

The SOT-323 package enables high-density PCB layouts while maintaining thermal stability up to +150 °C junction temperature. Its epitaxial planar die construction ensures consistent h_FE distribution and low leakage (I_EBO ≤ -130 μA at V_EB = -4 V).

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 height), RoHS-compliant, moisture sensitivity Level 1, 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 DDTA144GUA-7-F, DDTA144WU-7-F offers identical performance in identical packaging, while NSVDDTA144GUT5G adds AEC-Q101 qualification-making it suitable for automotive environments where DDTA144GUA-7-F meets industrial/commercial requirements only.

Availability

DDTA144GUA-7-F is available at Aetrix Electronics and suitable for smartphone camera modules, USB-C peripheral indicators, and industrial sensor signal conditioning requiring stable component supply and long-term manufacturability.

Supply support for DDTA144GUA-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 centers across Asia and manufacturing facilities in China, Taiwan, and the U.S.

This part belongs to the DDTA R2-Only Series of pre-biased transistors, designed specifically to simplify digital interface circuitry in portable and space-constrained electronics by integrating essential biasing functionality into the silicon die.

FAQ

What is the function of the internal R2 resistor in DDTA144GUA-7-F?

The internal R2 resistor (47 kΩ) connects the base to the emitter, forming a built-in pull-up network that enables direct connection to open-drain or CMOS logic outputs. This eliminates the need for an external base resistor, simplifying circuit design and reducing PCB footprint while ensuring predictable turn-on behavior under standard logic voltage levels.

Can DDTA144GUA-7-F replace a standard PNP BJT like BC807 in existing designs?

It can replace BC807 only if the circuit relies solely on base-current-driven switching and does not require adjustable biasing. Unlike BC807, DDTA144GUA-7-F has fixed R2 = 47 kΩ and no base terminal access-so it cannot be used in linear amplifier configurations or where variable base resistance is needed for gain control or thermal compensation.

Is DDTA144GUA-7-F qualified for automotive applications?

No-DDTA144GUA-7-F is specified for commercial and industrial use only (T_j = -55 °C to +150 °C), with no AEC-Q101 qualification. For automotive applications, consider the functionally identical NSVDDTA144GUT5G, which carries full AEC-Q101 stress test certification and PPAP documentation support.

How does the SOT-323 package affect thermal performance in high-duty-cycle switching?

With R_θJA = 625 °C/W on FR4 boards using Diodes' AP02001 pad layout, the SOT-323 limits continuous power dissipation to ~200 mW at ambient temperatures below 50 °C. For >50% duty cycle operation, derating is required-e.g., at 70 °C ambient, max usable power drops to ~120 mW to maintain T_j ≤ 150 °C.