Diodes Incorporated DDTA114WUA-7

Overview

DDTA114WUA-7 from Diodes Incorporated is a PNP pre-biased small-signal transistor in SOT-323 package, featuring integrated bias resistors R1 = 10 kΩ and R2 = 4.7 kΩ (R1 ≠ R2), V_CEO = −50 V, I_C(max) = −100 mA, and DC current gain (h_FE) = −24 at I_C = −10 mA. It operates as a digital switch or level translator in low-power logic interface circuits.

For engineers reviewing the DDTA114WUA-7 datasheet, DDTA114WUA-7 pinout, DDTA114WUA-7 application, or DDTA114WUA-7 equivalent, key selection criteria include input voltage thresholds (V_IN(on) = −1.3 V, V_IN(off) = −0.8 V), output saturation voltage (V_O(on) = −0.3 V), resistor tolerance (±30% on R1), and thermal resistance (R_θJA = 625 °C/W).

Technical Context

This device integrates a PNP bipolar junction transistor with two non-matching on-chip base bias resistors (R1 = 10 kΩ, R2 = 4.7 kΩ), enabling single-resistor input drive and eliminating external bias network requirements. Its R1 ≠ R2 configuration supports precise turn-on/turn-off threshold control for digital switching applications.

Designed for surface-mount logic interfacing, it delivers guaranteed V_IN(on) ≤ −1.3 V at I_O = −2 mA and V_O(on) ≤ −0.3 V at I_C/I_B = −10 mA/−0.5 mA, with f_T = 250 MHz for high-speed switching up to ~10 MHz in buffered gate-drive roles.

Key Specifications

Pinout & Package

Package: SOT-323 - ultra-small surface-mount plastic package (2.20 mm × 1.35 mm × 0.90 mm), RoHS-compliant, moisture sensitivity level 1, UL 94V-0 rated.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DDTA114YUA-7-F, DDTA114WUA-7 offers lower input threshold and faster turn-off due to smaller R2; versus DDTC114WUA-7-F, it provides complementary PNP behavior essential for negative-rail load control and inverted logic buffering.

Availability

DDTA114WUA-7 is available at Aetrix Electronics and suitable for industrial sensor interface, automotive body control module, and consumer IoT power sequencing requiring stable component supply and long-term production continuity.

Supply support for DDTA114WUA-7 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 (R1≠R2 Series) UA family of pre-biased transistors, engineered specifically for simplified logic-level translation and compact digital switching in space-constrained, cost-sensitive applications.

FAQ

What is the absolute maximum input voltage rating for DDTA114WUA-7?

The absolute maximum input voltage (V_IN) is specified as +10 V to −30 V at T_A = 25°C. This range reflects the combined breakdown limits of the internal R1–base–emitter junction and base–collector junction. Exceeding −30 V risks irreversible damage to the integrated bias resistors or transistor junctions, even with current limiting.

Can DDTA114WUA-7 be used in linear amplifier configurations?

No - this device is optimized for digital switching, not linear amplification. Its R1/R2 network fixes the base bias point, and its DC current gain (h_FE = −24) is only guaranteed under saturated switching conditions (V_CE ≤ −0.3 V). Small-signal parameters like h_fe or r_π are not characterized, and linearity is not assured across collector current ranges.

Is the SOT-323 package of DDTA114WUA-7 compatible with reflow soldering per J-STD-020?

Yes - the SOT-323 package is qualified for lead-free reflow per J-STD-020C, with moisture sensitivity level (MSL) 1. No baking is required prior to assembly. Peak reflow temperature must not exceed 260°C for ≤ 30 seconds, and the device uses matte tin plating over Alloy 42 leadframe for reliable wetting and intermetallic formation.

How does the R1 ≠ R2 architecture improve switching performance compared to R1 = R2 pre-biased transistors?

The asymmetric R1 (10 kΩ) and R2 (4.7 kΩ) values provide stronger base discharge during turn-off, reducing storage time and t_OFF by up to 40% versus symmetric variants. This enables cleaner edge transitions in 1–5 MHz clocked enable signals and prevents shoot-through in cascaded logic stages where fast state reversal is required.