Diodes Incorporated DDTB114EC-7-F

Overview

DDTB114EC-7-F from Diodes Incorporated is a PNP pre-biased transistor in SOT23 package, featuring integrated 10 kΩ base-emitter and base-collector bias resistors. It delivers DC current gain (h_FE) of 56 at I_C = −50 mA, V_CE = −5 V, supports −500 mA output current, and exhibits V_CE(sat) ≤ −0.3 V at I_C = −50 mA / I_B = −2.5 mA. It is used in low-power logic-level interface circuits for microcontroller-driven LED drivers and signal inversion stages.

For engineers reviewing the DDTB114EC-7-F datasheet, DDTB114EC-7-F pinout, DDTB114EC-7-F application, or DDTB114EC-7-F equivalent, key selection criteria include verified R₁/R₂ resistor values (10 kΩ/10 kΩ), guaranteed V_I(on) ≤ −3.0 V at I_O = −20 mA, confirmed SOT23 mechanical compatibility, and AEC-Q101 readiness for automotive signal conditioning.

Technical Context

This device integrates two precision-matched 10 kΩ resistors to configure a fixed-current PNP switch with predictable turn-on threshold and saturation behavior. Its V_I(on) of −3.0 V ensures reliable activation from standard 3.3 V or 5 V logic outputs when referenced to negative supply rails.

The transistor operates with BVCBO = −50 V, BVCEO = −40 V, and BVEBO = −5 V, supporting robust isolation in bidirectional signal routing and level-shifting applications. Its f_T = 200 MHz enables stable operation beyond audio frequencies without unintended oscillation in digital switching contexts.

Key Specifications

Pinout & Package

Package: SOT23 - surface-mount plastic package with matte tin-plated leads, moisture sensitivity level 1, UL 94V-0 rated molding compound, weight ≈ 0.008 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DDTB114EC-7-F, DDTB113EC-7-F offers faster switching but reduced noise margin, while DDTB113ZC-7-F trades symmetric bias for improved linearity-making DDTB114EC-7-F optimal for general-purpose logic-level inversion with balanced speed, noise immunity, and thermal performance.

Availability

DDTB114EC-7-F is available at Aetrix Electronics and suitable for LED driver interfaces, microcontroller GPIO expansion, and power rail sequencing requiring stable component supply across automotive, industrial, and consumer electronics programs.

Supply support for DDTB114EC-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 centers and manufacturing facilities across Asia and the Americas.

This part belongs to the DDTB series of pre-biased transistors engineered specifically for space-constrained, high-reliability signal switching in automotive and industrial control systems where simplified BOM and AEC-Q101 compliance are mandatory.

FAQ

What is the maximum continuous collector current rating for DDTB114EC-7-F?

The absolute maximum collector current is −500 mA, but the recommended continuous operating limit is −50 mA at T_A = +25°C with proper PCB thermal relief. At higher ambient temperatures or without enhanced copper pour, derating to −30 mA is advised to maintain V_CE(sat) ≤ −0.3 V and prevent thermal runaway.

Does DDTB114EC-7-F require external base resistors?

No. It integrates matched 10 kΩ R₁ (base–emitter) and R₂ (base–collector) resistors, eliminating the need for external biasing components. This reduces bill-of-materials count, PCB area, and layout complexity while ensuring consistent turn-on characteristics across production lots.

Is DDTB114EC-7-F qualified for automotive applications?

Yes. It is AEC-Q101 qualified and manufactured in IATF 16949 certified facilities. Full PPAP documentation is available upon request, and the device meets requirements for temperature cycling, mechanical shock, and humidity testing applicable to under-hood and cabin electronics.

How does the SOT23 package affect thermal performance?

With R_θJA = 625 °C/W on standard FR4, the SOT23 package limits power dissipation to ~200 mW at room temperature. To sustain higher currents, designers must use minimum recommended pad layout (2.0 mm × 0.8 mm copper area per pin) or add thermal vias to inner ground planes to reduce effective junction-to-ambient resistance.