Diodes Incorporated DDTA114EUA-7-F

Overview

DDTA114EUA-7-F from Diodes Incorporated is a PNP pre-biased small-signal transistor in SOT-323 package, featuring integrated bias resistors R1 = R2 = 10 kΩ, −40 V V_IN rating, −50 mA I_O max, and DC current gain (G_L) of −30 at V_CE = −5 V, I_C = −5 mA. It functions as a digital switch or level translator in low-power logic interface circuits.

For engineers reviewing the DDTA114EUA-7-F datasheet, DDTA114EUA-7-F pinout, DDTA114EUA-7-F application, or DDTA114EUA-7-F equivalent, key selection criteria include input voltage range (−40 V), output current capability (−50 mA), built-in resistor ratio (R2/R1 = 0.8–1.2), thermal resistance (625 °C/W), and RoHS-compliant SOT-323 footprint compatibility with space-constrained PCB layouts.

Technical Context

This device implements an integrated PNP bipolar junction transistor with monolithically embedded base-emitter and base-collector bias resistors (R1 = R2 = 10 kΩ ±30%). Its inverter-equivalent circuit enables direct TTL/CMOS-compatible switching without external bias components.

It operates with V_IN up to −40 V and delivers V_O(on) ≤ −0.3 V at I_O = −10 mA / I_IN = −0.5 mA, supporting rail-to-rail logic-level translation in battery-powered and industrial control signal conditioning paths.

Key Specifications

Pinout & Package

SOT-323 surface-mount plastic package (2.20 × 1.35 × 0.90 mm), UL 94V-0 rated, moisture sensitivity Level 1, lead-free matte tin plating.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DDTA114YCA-7-F and NSV114EUT1H, DDTA114EUA-7-F uniquely balances ultra-compact SOT-323 size, −40 V input robustness, and −50 mA drive in a cost-optimized industrial-grade package.

Availability

DDTA114EUA-7-F is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, and consumer IoT peripherals requiring stable component supply across long-lifecycle production programs.

Supply support for DDTA114EUA-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 and manufacturing operations across Asia and the Americas.

This part belongs to the DDTA pre-biased transistor product line, engineered specifically for simplified digital switching in space- and cost-constrained applications where eliminating external bias resistors improves reliability and reduces assembly complexity.

FAQ

What is the maximum safe operating voltage between collector and emitter?

The absolute maximum V_CE rating is not explicitly specified in the datasheet, but the device is rated for V_CC = −50 V between terminals 3 and 2, and its typical V_CE(sat) curves show operation down to −50 V. For reliable design, limit V_CE to ≤ −40 V under normal conditions per the input voltage specification and derating curve guidance.

Can DDTA114EUA-7-F replace a standard PNP BJT like BC807 in existing designs?

Yes, but only if the circuit relies on fixed-base biasing and does not require adjustable gain or linear amplification. The integrated 10 kΩ resistors fix the bias point, so it replaces BC807 only in saturated-switch applications where external resistors were previously used-no redesign is needed for logic-level switching topologies.

Is the SOT-323 package compatible with standard reflow profiles for lead-free assembly?

Yes. The device uses matte tin finish over Alloy 42 leadframe and complies with J-STD-020C Level 1 moisture sensitivity. It supports standard IPC/JEDEC J-STD-020 Class 3 reflow profiles, including peak temperatures up to 260 °C, with no pre-bake required due to its Level 1 classification.

How does the R2/R1 tolerance affect switching performance?

R2/R1 is guaranteed 0.8–1.2, meaning base current can vary ±20% across units. This impacts saturation depth: worst-case R2/R1 = 0.8 increases base current by ~25%, improving saturation margin; R2/R1 = 1.2 reduces base current, potentially increasing V_CE(sat) by ≤0.05 V at I_C = −5 mA, remaining within −0.3 V spec.