Diodes Incorporated DDTA115ECA-7-F

Overview

DDTA115ECA-7-F from Diodes Incorporated is a PNP pre-biased small-signal surface-mount transistor in SOT23 package, featuring integrated bias resistors R1 = R2 = 100 kΩ, −40 V input voltage rating, −20 mA output current capability, and AEC-Q101 qualification for automotive applications such as LED load switching in body control modules.

For engineers reviewing the DDTA115ECA-7-F datasheet, DDTA115ECA-7-F pinout, DDTA115ECA-7-F application, or DDTA115ECA-7-F equivalent, key selection criteria include input resistor tolerance (±30%), DC current gain (82×), saturation voltage (−0.3 V at −5 mA), thermal resistance (625 °C/W), and automotive-grade reliability under −55 °C to +150 °C operation.

Technical Context

This device integrates a PNP bipolar junction transistor with two matched on-die base bias resistors (R1 = R2 = 100 kΩ), enabling single-resistor logic-level interface without external components. It operates as a digital switch with guaranteed turn-on at VI = −1.9 V (typ) and turn-off at VI = −0.5 V (min) under VCC = −5 V.

Its −40 V maximum input voltage rating and −20 mA continuous output current support robust interfacing with 3.3 V/5 V microcontroller GPIOs driving inductive or resistive loads. The 250 MHz fT ensures adequate speed for low-frequency digital control (<1 MHz switching), while AEC-Q101 qualification confirms suitability for automotive power management subsystems.

Key Specifications

Pinout & Package

Package: SOT23 - surface-mount plastic package with matte tin-plated leads, moisture sensitivity level 1, weight ≈ 0.008 g, UL 94V-0 rated molding compound.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DDTA144ECA-7-F and DDTA114ECA-7-F, DDTA115ECA-7-F offers the highest input impedance (100 kΩ) and lowest input current (−0.15 mA), making it optimal for battery-powered nodes and high-impedance logic buffering where leakage and power consumption are critical.

Availability

DDTA115ECA-7-F is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input stages, and medical diagnostic equipment requiring stable component supply, AEC-Q101 compliance, and long-term lifecycle continuity.

Supply support for DDTA115ECA-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 the Americas.

This part belongs to the DDTA pre-biased transistor product line, engineered specifically for simplified digital switching in automotive and industrial control systems where space, reliability, and qualification rigor are paramount.

FAQ

What is the maximum continuous collector current for DDTA115ECA-7-F?

The absolute maximum continuous output current is −20 mA, verified per DS30333 Rev. 10–2 Section "Absolute Maximum Ratings". This rating applies at TA = +25°C with derating above 25°C per the 200 mW power limit and 625 °C/W thermal resistance. Exceeding −20 mA risks thermal runaway or parametric shift in production use.

Does DDTA115ECA-7-F require external base resistors?

No. It integrates two matched 100 kΩ silicon-based bias resistors (R1 = R2) directly on-die, forming a complete PNP switch circuit. No external base resistor is needed for standard 3.3 V or 5 V logic-level drive, simplifying layout and reducing component count versus discrete BJT + resistor solutions.

Is DDTA115ECA-7-F suitable for 1.8 V logic interfaces?

It is not optimized for 1.8 V logic: its V_IN(on) is −1.9 V (typ), meaning it may not reliably turn on when driven by a 1.8 V high-level signal. For 1.8 V systems, DDTA144ECA-7-F (47 kΩ) or DDTA124ECA-7-F (22 kΩ) provide lower input thresholds and higher base current, ensuring robust activation.

How does the AEC-Q101 qualification impact design validation?

AEC-Q101 qualification confirms the device has passed stress tests including HTOL (1000 hrs @ 125 °C), temperature cycling (−40 °C to +125 °C × 1000 cycles), and ESD (HBM ≥ 2 kV). This eliminates need for requalification in automotive applications, reduces test overhead, and supports PPAP submission with full traceability and failure analysis data.