Diodes Incorporated DDTA144TKA-7-F

Overview

DDTA144TKA-7-F from Diodes Incorporated is a PNP pre-biased small-signal transistor with built-in 47 kΩ base bias resistor (R1 only), SC-59 package, −50 V V_CEO, −100 mA I_C, and h_FE of 100–600 at −1 mA/−5 V; used in discrete logic-level switching and load control in portable power management circuits.

For engineers reviewing the DDTA144TKA-7-F datasheet, DDTA144TKA-7-F pinout, DDTA144TKA-7-F application, or DDTA144TKA-7-F equivalent, key selection criteria include verified R1-only biasing topology, guaranteed V_CE(sat) ≤ −0.3 V at −1 mA/−0.1 mA drive, SC-59 thermal performance (R_θJA = 625 °C/W), and RoHS-compliant green molding compound compliance.

Technical Context

This device implements a single-PNP transistor with monolithic integration of one external-base resistor (R1 = 47 kΩ ±30%), eliminating need for discrete bias components in high-side switch configurations. It operates with fixed emitter-grounded topology and supports DC switching up to 250 MHz f_T.

The SC-59 package enables surface-mount assembly with JEDEC-standard footprint and J-STD-020C Level 1 moisture sensitivity. Its −55 °C to +150 °C operating range and 200 mW power dissipation suit industrial and automotive ambient environments where discrete bias stability is critical.

Key Specifications

Pinout & Package

Package: SC-59 - 3-pin surface-mount plastic package with 0.008 g mass, UL 94V-0 flammability rating, 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 DDTA144TKA-7-F, the DDTA144W-7-F trades thermal performance for size reduction, while the NSVDDTA144TXZT5G adds automotive qualification without altering bias or switching behavior-making it a direct drop-in for certified designs.

Availability

DDTA144TKA-7-F is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller interface stages, and industrial sensor output stages requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for DDTA144TKA-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 in China, Taiwan, and the U.S.

This part belongs to the DDTA R1-Only Series, designed specifically for simplified high-side switching in cost-sensitive, high-volume consumer and industrial applications where resistor integration reduces BOM count and improves assembly yield.

FAQ

What is the function of the internal 47 kΩ resistor in DDTA144TKA-7-F?

The internal 47 kΩ resistor connects between base and emitter (R1-only configuration), providing fixed base bias to ensure reliable saturation when driven by logic-level signals. It eliminates the need for an external pull-up or pull-down resistor, reducing component count and PCB area while maintaining consistent I_B across temperature and process variation.

Can DDTA144TKA-7-F replace a standard PNP transistor like BC807 in existing designs?

No-DDTA144TKA-7-F is not a direct replacement for BC807 because it lacks a base connection independent of R1. Its base terminal is internally tied to the 47 kΩ resistor, making it unsuitable for applications requiring variable base drive or linear amplification. It is optimized exclusively for digital switching with predefined bias.

What is the maximum safe operating current at 85°C ambient temperature?

At 85°C ambient, derating per Figure 1 reduces maximum power dissipation to ~120 mW. With V_CE(sat) ≤ −0.3 V, the corresponding safe continuous collector current is approximately −40 mA. Exceeding this requires thermal analysis using the 625 °C/W R_θJA value and actual board layout per AP02001 guidelines.

Is DDTA144TKA-7-F suitable for automotive applications?

DDTA144TKA-7-F meets basic electrical and environmental specs for automotive use (−55 °C to +150 °C, AEC-Q101-referenced stress levels), but it is not AEC-Q101 certified. For production automotive systems, Diodes recommends the functionally identical NSVDDTA144TXZT5G, which carries full AEC-Q101 qualification and PPAP-ready documentation.