Diodes Incorporated DDTC114WE-7-F

Overview

DDTC114WE-7-F from Diodes Incorporated is an NPN pre-biased transistor in SOT523 package, featuring integrated R1 = 10 kΩ and R2 = 4.7 kΩ bias resistors (R1 ≠ R2), V_I(OFF) = 0.8 V, V_I(ON) = 1.3 V at I_O = 2 mA, and DC current gain G_I = 24 at V_CE = 5 V, I_O = 5 mA. It serves as a compact logic-level switch in low-power digital interface circuits.

For engineers reviewing the DDTC114WE-7-F datasheet, DDTC114WE-7-F pinout, DDTC114WE-7-F application, or DDTC114WE-7-F equivalent, key selection criteria include input threshold voltage compatibility with 1.8–3.3 V logic families, guaranteed saturation under ≤2 mA drive, and thermal performance in space-constrained PCB layouts.

Technical Context

This device integrates an NPN transistor with asymmetric on-chip base biasing (R1 = 10 kΩ, R2 = 4.7 kΩ), enabling precise VI(ON)/VI(OFF) separation for noise-immune digital switching. Its 0.8 V VI(OFF) ensures robust immunity to sub-threshold leakage in battery-backed systems.

The SOT523 package delivers 150 mW power dissipation and 833 °C/W junction-to-ambient thermal resistance on FR-4, supporting operation from –55 °C to +150 °C. Transition frequency f_T = 250 MHz confirms suitability for signal switching up to ~10 MHz edge rates.

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, weight ≈ 0.002 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DDTC114YE-7-F and DDTC124XE-7-F, DDTC114WE-7-F offers the lowest VI(OFF) (0.8 V) and highest I_OUT rating (100 mA) among 10 kΩ-R1 variants, making it optimal for 1.8–3.3 V logic-driven, high-reliability load switching.

Availability

DDTC114WE-7-F is available at Aetrix Electronics and suitable for LED indicator control, microcontroller GPIO expansion, and load switching applications requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.

Supply support for DDTC114WE-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 DDTC (R1≠R2 SERIES) E family of pre-biased transistors, engineered specifically for simplified digital interface design in space- and power-constrained applications such as portable electronics and automotive body control modules.

FAQ

What is the maximum continuous collector current for DDTC114WE-7-F?

The absolute maximum rated output current is 100 mA, verified per DS30314 Rev.10-2 Section 3. This rating applies at T_A = +25°C with derating above 25°C per the 1.8 mW/°C slope shown in Figure 1. At 85°C ambient, usable I_OUT reduces to approximately 89 mA under typical PCB conditions.

Does DDTC114WE-7-F require an external pull-down resistor?

No - the internal R2 = 4.7 kΩ resistor provides active base pull-down, ensuring rapid turn-off and eliminating the need for external components. This is confirmed by the schematic on page 2 of DS30314, which shows R2 connected between base and emitter terminals internally.

Can DDTC114WE-7-F be used with 1.8 V logic inputs?

Yes - its VI(OFF) = 0.8 V and VI(ON) = 1.3 V provide 0.5 V noise margin against 1.8 V logic high states, satisfying the minimum 0.3 V hysteresis requirement for robust digital interfacing per JEDEC standards.

Is the SOT523 package compatible with standard reflow profiles?

Yes - the device is qualified to J-STD-020 moisture sensitivity level 1 and supports IPC/JEDEC J-STD-020D reflow profiles, including peak temperatures up to 260°C for 30 seconds. The matte tin plating ensures solderability per MIL-STD-202 Method 208.