Diodes Incorporated DDTA123YE-7-F

Overview

DDTA123YE-7-F from Diodes Incorporated is a PNP pre-biased small-signal transistor in SOT523 package, featuring built-in bias resistors R1 = 2.2 kΩ and R2 = 10 kΩ (R1 ≠ R2), V_I(OFF) = −0.3 V, I_O = −100 mA max, and DC current gain G_L = 33 at I_C = −10 mA. It is AEC-Q101 qualified for automotive signal switching in low-power logic interfaces.

For engineers reviewing the DDTA123YE-7-F datasheet, DDTA123YE-7-F pinout, DDTA123YE-7-F application, or DDTA123YE-7-F equivalent, key selection criteria include input voltage thresholds (V_I(ON) = −3.0 V @ I_O = −20 mA), saturation behavior (V_CE(SAT) ≤ −0.3 V), resistor tolerance (±30% on R1), and thermal resistance (R_θJA = 833 °C/W).

Technical Context

This device integrates a PNP bipolar junction transistor with two monolithically embedded base bias resistors-R1 connected between base and emitter, R2 between base and collector-enabling single-resistor input drive and eliminating external bias network design. Its R1 ≠ R2 topology provides asymmetric turn-on/turn-off characteristics ideal for digital switching.

Designed for surface-mount operation on FR4 PCBs, it delivers stable DC current gain (G_L = 33 min) across −55°C to +150°C, supports fast switching via f_T = 250 MHz, and maintains I_O(OFF) ≤ −0.5 µA at V_CC = −50 V for low leakage in standby states.

Key Specifications

Pinout & Package

Package: SOT523 - ultra-small surface-mount plastic package (1.60 mm × 1.60 mm × 0.75 mm), moisture sensitivity level 1, matte tin-plated leads, weight ≈ 0.002 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DDTA123YE-7-F, DDTA123YK-7-F trades compactness for thermal headroom, while NSV123YUT1G sacrifices AEC-Q101 compliance and gain stability for lower unit cost-making the original optimal for space-constrained, thermally marginal, automotive-grade switching.

Availability

DDTA123YE-7-F is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input stages, and portable medical sensor interfaces requiring stable component supply, AEC-Q101 assurance, and ultra-small SMT packaging.

Supply support for DDTA123YE-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 components for automotive, industrial, and computing markets with ISO/TS 16949 and IATF 16949 certification.

This part belongs to the DDTA (R1≠R2 Series) pre-biased transistor family, engineered specifically for simplified digital switching in space- and reliability-critical applications where external bias networks must be eliminated without sacrificing gain or thermal performance.

FAQ

What is the maximum continuous collector current for DDTA123YE-7-F?

The absolute maximum rated output current (I_O) is −100 mA, verified per DS30318 Rev. 9–2. This rating applies at T_A = 25°C with proper PCB thermal relief; derating is required above 25°C ambient per the power dissipation curve (P_D = 150 mW at T_A = 25°C, decreasing linearly to zero at T_A = 150°C).

Does DDTA123YE-7-F require external bias resistors?

No. It contains monolithic silicon-based R1 = 2.2 kΩ and R2 = 10 kΩ bias resistors integrated into the die. These eliminate the need for external base resistors in standard digital switching configurations, reducing component count and PCB area while ensuring consistent biasing across temperature and process variation.

Is DDTA123YE-7-F suitable for 3.3 V logic interfacing?

Yes. With V_I(ON) = −3.0 V @ I_O = −20 mA and V_I(OFF) = −0.3 V, it reliably switches when driven by 3.3 V GPIOs configured as open-drain or with appropriate level translation. The −3.0 V threshold ensures noise margin against ground bounce and supply ripple in automotive environments.

How does the R1 ≠ R2 architecture improve switching performance?

The asymmetric resistor network (R1 = 2.2 kΩ to emitter, R2 = 10 kΩ to collector) accelerates turn-off by actively pulling the base toward collector potential during deactivation, reducing stored charge and cut-off delay. This yields faster switching than symmetric (R1 = R2) pre-biased transistors, especially in repetitive digital pulse applications.