Diodes Incorporated DDTA144GKA-7-F

Overview

DDTA144GKA-7-F from Diodes Incorporated is a PNP pre-biased small-signal transistor with single built-in bias resistor (R2 = 47 kΩ), SC-59 package, V_CEO = −50 V, I_C(max) = −100 mA, and h_FE = 68 at I_C = −5 mA / V_CE = −5 V, used in discrete logic-level switching and level-shifting circuits.

For engineers reviewing the DDTA144GKA-7-F datasheet, DDTA144GKA-7-F pinout, DDTA144GKA-7-F application, or DDTA144GKA-7-F equivalent, key selection criteria include R2-only biasing topology, guaranteed h_FE minimum, SC-59 thermal derating curve, V_CE(sat) ≤ −0.3 V at I_C = −10 mA / I_B = −0.5 mA, and JEDEC-compliant lead-free plating.

Technical Context

This device implements a monolithic PNP bipolar junction transistor with an integrated 47 kΩ base-emitter pull-up resistor (R2 only, no R1), enabling simplified single-resistor biasing for digital interface applications. It operates within −55°C to +150°C and delivers stable DC current gain across I_C = −1 mA to −50 mA under V_CE = −5 V.

The SC-59 package provides 625°C/W junction-to-ambient thermal resistance on FR4 PCBs with recommended pad layout, and its "Green" molding compound meets UL 94V-0 flammability rating. Moisture sensitivity is Level 1 per J-STD-020D.

Key Specifications

Pinout & Package

Package: SC-59 - surface-mount, 3-terminal plastic package with gull-wing leads, 0.008 g mass, UL 94V-0 rated molding compound, and matte tin-plated copper leadframe.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DDTA144W-7-F and NSV14001T1G, DDTA144GKA-7-F offers optimal balance of gain (68), thermal performance (625°C/W), and industry-standard SC-59 compatibility-making it preferred for cost-sensitive, medium-power discrete logic interfaces where layout stability matters.

Availability

DDTA144GKA-7-F is available at Aetrix Electronics and suitable for LED driver stages, microcontroller GPIO interfaces, and power sequencing control requiring stable component supply and long-term industrial availability.

Supply support for DDTA144GKA-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, AEC-Q101 qualified components for automotive, industrial, and computing markets.

This part belongs to the DDTA R2-Only Series of pre-biased transistors, designed specifically to reduce bill-of-materials count and improve assembly yield in digital interface and level-shifting applications.

FAQ

What is the function of the internal R2 resistor in DDTA144GKA-7-F?

The internal R2 resistor (47 kΩ) connects between base and emitter, providing automatic biasing that eliminates the need for an external pull-up resistor. It ensures the transistor remains off when the base is left floating or driven high, enabling direct connection to open-drain or active-low logic outputs without additional components.

Can DDTA144GKA-7-F replace a standard PNP transistor like BC807 in existing designs?

No-it is not a direct replacement for non-pre-biased transistors. Its internal R2 alters biasing behavior: base must be actively pulled low to turn on, unlike BC807 which requires external base current control. Redesign of base drive circuitry is required to accommodate the R2-only topology and avoid unintended conduction.

What is the maximum operating temperature and thermal derating behavior?

The device operates from −55°C to +150°C. At T_A = 25°C, P_D = 200 mW; above 25°C, power dissipation linearly derates at 0.32 mW/°C (per 625°C/W θ_JA). Full-rated power is usable only with proper PCB copper area per Diodes' AP02001 layout guidelines.

Is DDTA144GKA-7-F suitable for analog amplification applications?

No-it is optimized for digital switching, not linear amplification. Its h_FE is specified only at I_C = −5 mA / V_CE = −5 V, and f_T = 250 MHz is a small-signal AC parameter. The R2 bias network prevents stable DC bias point setting required for Class-A amplifiers, and V_CE(sat) is not characterized across analog operating ranges.