Diodes Incorporated DDTC114EKA-7-F

Overview

DDTC114EKA-7-F from Diodes Incorporated is an NPN pre-biased small-signal transistor in SC-59 package with integrated bias resistors R1 = R2 = 10 kΩ, V_CEO = 50 V, I_C(max) = 50 mA, P_D = 200 mW, and DC current gain (h_FE) ≥30 at I_C = 5 mA, V_CE = 5 V - used for digital switching and level translation in compact logic interface circuits.

For engineers reviewing the DDTC114EKA-7-F datasheet, DDTC114EKA-7-F pinout, DDTC114EKA-7-F application, or DDTC114EKA-7-F equivalent, key selection factors include input voltage thresholds (V_IN(on) = 1.9 V typ, V_IN(off) = 0.5–1.1 V), output saturation voltage (V_CE(sat) ≤ 0.3 V at I_C/I_B = 10 mA/0.5 mA), resistor tolerance (±30%), and thermal resistance (R_θJA = 625 °C/W).

Technical Context

This device integrates two matched 10 kΩ bias resistors (R1 = R2) to configure a single-transistor inverter with fixed base biasing, eliminating external components for digital signal conditioning. It operates as a saturated switch with guaranteed turn-on at V_IN ≥ 1.9 V and reliable cutoff below 1.1 V under 100 μA load.

The SC-59 surface-mount package supports automated assembly and provides defined thermal performance (625 °C/W junction-to-ambient) when mounted per Diodes' recommended FR4 pad layout. Its epitaxial planar die construction ensures stable h_FE ≥30 and f_T = 250 MHz for moderate-speed switching up to ~10 MHz.

Key Specifications

Pinout & Package

Package: SC-59 - three-terminal surface-mount plastic package (0.35–0.50 mm A dimension, 2.70–3.00 mm C dimension), RoHS-compliant, matte tin-plated copper leadframe, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DDTC114EKA-7-F, DDTC114YKA-7-F offers higher current and gain for demanding loads, while NSVD114EWT1G provides identical bias but greater drive headroom in SOT-23 - both require verification of V_CE(sat) and thermal rise under actual I_C conditions.

Availability

DDTC114EKA-7-F is available at Aetrix Electronics and suitable for microcontroller GPIO interface, LED driver circuit, and level translation in sensor subsystems requiring stable component supply and RoHS-compliant sourcing.

Supply support for DDTC114EKA-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, cost-optimized components for industrial, computing, and consumer markets.

This part belongs to the DDTC R1=R2 series of pre-biased transistors, designed specifically to simplify digital interface design by integrating matched bias resistors into standard SMT packages for plug-and-play logic translation.

FAQ

What is the function of Pin 1 (Emitter) in the DDTC114EKA-7-F?

Pin 1 is the emitter terminal, internally connected to both the NPN transistor emitter and the lower end of the R2 bias resistor. It serves as the common reference node for input and output current paths and must be tied to system ground or the lowest potential in the switching circuit to ensure proper biasing and saturation behavior.

Can DDTC114EKA-7-F replace a standard 2N3904 with external base resistors?

Yes - it replaces a 2N3904 plus two 10 kΩ resistors in inverter configurations. However, its fixed R1=R2=10 kΩ network sets specific input impedance and drive requirements; verify that source drive capability meets I_B ≈ (V_IN − 0.7 V)/10 kΩ and that V_IN(on) ≥ 1.9 V is satisfied by the driving signal.

Is DDTC114EKA-7-F suitable for linear amplification?

No - this device is optimized for digital switching, not analog amplification. Its guaranteed parameters (V_CE(sat), h_FE min at I_C=5 mA) and internal resistor network prevent stable biasing in active-region amplifier configurations; use discrete transistors like BC847 or MMBT3904 for linear gain stages.

What is the maximum operating temperature for continuous operation?

The device supports continuous operation from −55°C to +150°C ambient, but power dissipation must be derated above 25°C at 1.6 mW/°C (per R_θJA = 625 °C/W). At 85°C ambient, maximum allowable P_D drops to 104 mW - limiting I_C to ~35 mA at V_CE(sat) = 0.3 V to stay within thermal limits.