Diodes Incorporated DDTA123YUA-7-F

Overview

DDTA123YUA-7-F from Diodes Incorporated is a PNP pre-biased small-signal transistor in SOT-323 package with integrated bias resistors R1 = 2.2 kΩ and R2 = 10 kΩ (R1 ≠ R2), −50 V V_CEO, −100 mA I_C(max), and DC current gain (h_FE) of −33 at −10 mA/−5 V. It functions as a logic-level interface switch in low-power digital control circuits, such as microcontroller GPIO-driven LED drivers or level-shifting signal inverters.

For engineers reviewing the DDTA123YUA-7-F datasheet, DDTA123YUA-7-F pinout, DDTA123YUA-7-F application, or DDTA123YUA-7-F equivalent, key selection criteria include verified input voltage thresholds (V_IN(on) = −3.0 V @ −20 mA), output saturation voltage (V_O(on) = −0.1 V), built-in resistor ratio tolerance (±20%), thermal resistance (625 °C/W), and RoHS-compliant green molding compound construction.

Technical Context

This device integrates a PNP bipolar junction transistor with two non-matching on-chip base bias resistors (R1 = 2.2 kΩ, R2 = 10 kΩ), enabling single-resistor input drive without external bias network. Its complementary NPN counterpart is DDTC123YUA-7-F.

Designed for DC-coupled switching, it operates with input voltages from +5 V to −12 V and delivers −100 mA output current into saturated conduction. The epitaxial planar die supports stable h_FE across −55 °C to +150 °C ambient range and exhibits 250 MHz f_T for moderate-speed digital applications.

Key Specifications

Pinout & Package

Package: SOT-323 - ultra-small surface-mount plastic package (2.0–2.2 mm × 1.15–1.35 mm × 0.25–0.40 mm height), lead-free matte tin plating, UL 94V-0 rated, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DDTA123JUA-7-F, this part offers stronger input drive (−3.0 V threshold) and lower R2, improving switching speed in high-frequency GPIO toggling; versus DDTC123YUA-7-F, it provides complementary polarity for negative-rail systems without redesigning bias networks.

Availability

DDTA123YUA-7-F is available at Aetrix Electronics and suitable for microcontroller GPIO drivers, LED indicator control, and level-shifting inverters requiring stable component supply, consistent parametric performance, and RoHS-compliant packaging.

Supply support for DDTA123YUA-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, industry-standard components for power management, signal integrity, and protection applications.

This device belongs to the DDTA (R1≠R2 Series) UA family-designed specifically for space-constrained, low-power digital interface applications requiring factory-trimmed asymmetric bias networks and guaranteed switching thresholds.

FAQ

What is the maximum operating temperature for DDTA123YUA-7-F?

The device supports continuous operation from −55 °C to +150 °C junction temperature. Its thermal resistance (R_θJA = 625 °C/W) assumes mounting on FR4 PCB with Diodes Inc.'s recommended pad layout (AP02001). Derating begins above 25 °C ambient, reducing maximum power dissipation linearly.

Can DDTA123YUA-7-F replace a discrete PNP transistor plus two resistors?

Yes-it integrates a PNP transistor with R1 = 2.2 kΩ and R2 = 10 kΩ, eliminating two external components. Verified V_IN(on) = −3.0 V and V_O(on) = −0.1 V confirm functional equivalence in saturated-switch applications where bias resistor tolerances and layout parasitics previously caused variation.

Is the SOT-323 package compatible with standard reflow profiles?

Yes-the SOT-323 package meets J-STD-020C Level 1 moisture sensitivity and uses matte tin lead finish compatible with Pb-free reflow profiles (peak ≤ 260 °C). No pre-bake is required, and solderability is validated per MIL-STD-202, Method 208.

How does the R1 ≠ R2 architecture improve performance over symmetric pre-biased transistors?

The asymmetric resistor network (R1 = 2.2 kΩ, R2 = 10 kΩ) provides optimized base current control for faster turn-on/turn-off transitions and improved noise rejection. Unlike R1 = R2 designs, it avoids unintended latch-up in noisy environments and delivers tighter V_IN(on) consistency across process variation.