Diodes Incorporated DDTC142JE-7-F

Overview

DDTC142JE-7-F from Diodes Incorporated is an NPN pre-biased transistor in SOT523 package, featuring integrated 0.47kΩ and 10kΩ bias resistors, AEC-Q101 qualification for automotive reliability, 50V V_CC, and 100mA output current capability. It functions as a single-stage digital switch in low-power logic interface circuits, commonly used in automotive body control modules for LED driver enable/disable control.

For engineers reviewing the DDTC142JE-7-F datasheet, DDTC142JE-7-F pinout, DDTC142JE-7-F application, or DDTC142JE-7-F equivalent, key selection criteria include input threshold voltage (V_I(ON) = 2.0V), saturation voltage (V_CE(SAT) ≤ 0.3V), DC current gain (G_L = 56), thermal resistance (R_θJA = 625°C/W), and AEC-Q101 compliance status.

Technical Context

This device integrates two precision bias resistors (R1 = 0.47kΩ, R2 = 10kΩ) to eliminate external components in digital switching applications. Its epitaxial planar construction ensures stable gain and low leakage, with V_I(OFF) ≤ 0.3V enabling reliable turn-off under noisy logic conditions.

The SOT523 package supports high-density PCB layouts while maintaining 150mW power dissipation at 25°C ambient. Thermal derating begins at 0.24mW/°C above 25°C, per the published power derating curve, and the device operates across –55°C to +150°C junction temperature range.

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 terminals, UL 94V-0 rated molding compound.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DDTC142JE-7-F, DDTC142TK-7-F lacks internal R2 and demands external biasing, while NSVD142JXV6T1G delivers identical electrical behavior but in a less space-efficient package-making DDTC142JE-7-F optimal for AEC-Q101-compliant, high-density automotive PCBs.

Availability

DDTC142JE-7-F is available at Aetrix Electronics and suitable for automotive body electronics, LED lighting control, and low-voltage logic interface applications requiring stable component supply and long-term lifecycle support.

Supply support for DDTC142JE-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.

The DDTC series targets cost-sensitive, space-constrained automotive and industrial control applications where integrated biasing reduces bill-of-materials count and improves assembly yield.

FAQ

Is DDTC142JE-7-F still in active production?

No-DDTC142JE-7-F is marked "OBSOLETE – PART DISCONTINUED" in the official Diodes datasheet (DS30404 Rev. 8-4, June 2021). Aetrix Electronics maintains limited legacy stock for design continuity and last-time buy support, subject to availability verification prior to order placement.

What is the exact pin configuration for SOT523 package?

The SOT523 package has three terminals in linear order: Pin 1 = Emitter, Pin 2 = Base, Pin 3 = Collector (top view, marking side up, flat edge left). This matches the schematic diagram on page 2 of DS30404 and is confirmed by Diodes' official package outline documentation.

Can DDTC142JE-7-F replace a standard 2N3904 with external resistors?

Yes-when configured as a saturated switch with 3.3V or 5V logic drive, DDTC142JE-7-F replicates the function of a 2N3904 + two bias resistors, but with tighter tolerance (0.47kΩ ±5%, 10kΩ ±5%), reduced parasitic inductance, and guaranteed matching between R1 and R2 within the same die.

Does this part support 125°C ambient operation?

Yes-the device is rated for T_J = –55°C to +150°C. At 125°C ambient, maximum allowable power dissipation drops to ~90mW (per Fig. 1 derating curve), which supports 100mA switching only if V_CE(SAT) remains ≤ 0.9V-verified at I_C = 5mA, but not guaranteed at full 100mA under extreme temperature.