Diodes Incorporated DDTA123EE-7-F

Overview

DDTA123EE-7-F from Diodes Incorporated is a 50V PNP pre-biased transistor in SOT523 package with integrated bias resistors R1 = R2 = 2.2kΩ, designed for digital switching and level translation in space-constrained logic interfaces. It delivers -100mA output current, -0.3V saturation voltage at -20mA load, and DC current gain of -20 at -20mA collector current, enabling direct microcontroller GPIO drive without external base resistors.

For engineers reviewing the DDTA123EE-7-F datasheet, DDTA123EE-7-F pinout, DDTA123EE-7-F application, or DDTA123EE-7-F equivalent, key selection criteria include input voltage thresholds (V_I(OFF) = -1.1V, V_I(ON) = -1.9V), guaranteed -100mA sink capability, SOT523 thermal resistance (833°C/W), and automotive-grade JEDEC qualification for high-reliability embedded control.

Technical Context

This device integrates a PNP bipolar transistor with two matched 2.2kΩ bias resistors (R1 = R2) in a single SOT523 package, forming an inverter circuit where Pin 1 is input, Pin 2 is emitter (GND reference), and Pin 3 is collector output. Its internal resistor ratio tolerance (±1%) ensures consistent turn-on behavior across temperature and process variation.

Designed for low-voltage digital interface applications, it operates with input voltages from -12V to +10V and supports output currents up to -100mA while maintaining V_CE(sat) ≤ -0.3V. The 250MHz f_T enables fast switching in signal routing and enable/disable functions below 10MHz.

Key Specifications

Pinout & Package

Package: SOT523 - ultra-small surface-mount plastic package (1.60 × 1.60 × 0.75 mm), moisture sensitivity level 1, matte tin-plated leads, 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 DDTA143EE-7-F and DDTA114EE-7-F, the DDTA123EE-7-F provides the highest output current (-100mA) and lowest input threshold (-1.9V), making it optimal for 3.3V/5V microcontroller-driven switching where drive strength and low-voltage compatibility are critical.

Availability

DDTA123EE-7-F is available at Aetrix Electronics and suitable for industrial sensor interfaces, LED driver circuits, and microcontroller GPIO expansion requiring stable component supply and JEDEC-qualified reliability.

Supply support for DDTA123EE-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 North America.

This part belongs to the DDTA pre-biased transistor family, engineered specifically for simplified digital interface design in space-constrained, high-volume applications such as consumer electronics, industrial controls, and automotive subsystems.

FAQ

What is the absolute maximum input voltage range for DDTA123EE-7-F?

The absolute maximum input voltage (Pin 1 to Pin 2) is +10V to -12V per the datasheet's Absolute Maximum Ratings table. Exceeding -12V risks damage to the internal bias resistors or transistor junction, even if V_CEO remains within its 50V rating. This range ensures safe operation with common logic families including 3.3V, 5V, and 12V systems.

Can DDTA123EE-7-F be used in automotive applications?

Yes - DDTA123EE-7-F is qualified to JEDEC standards referenced in AEC-Q specifications and manufactured in IATF 16949-certified facilities. While not explicitly AEC-Q101 certified out-of-box, Diodes states it meets high-reliability requirements for automotive subsystems; formal PPAP documentation and AEC-Q101 qualification can be requested through Diodes' automotive support team.

How does the R1 = R2 configuration affect switching performance?

The matched 2.2kΩ resistors provide symmetric base biasing that stabilizes turn-on/turn-off thresholds and reduces propagation delay variation across temperature. Measured V_I(OFF) = -1.1V and V_I(ON) = -1.9V yield ~0.8V hysteresis, improving noise immunity without external components - critical for robust operation in electrically noisy industrial environments.

Is thermal derating required for continuous operation at ambient temperatures above 25°C?

Yes - with R_θJA = 833°C/W and P_D = 150mW at T_A = 25°C, power dissipation must be linearly reduced by 0.18mW/°C above 25°C. At 85°C ambient, maximum allowable power drops to ~37mW, limiting continuous output current to approximately -30mA at V_CE(sat) = -0.3V to avoid junction overheating.