Diodes Incorporated DDTA124XUA-7-F

Overview

DDTA124XUA-7-F from Diodes Incorporated is a PNP pre-biased small-signal transistor in SOT-323 package, featuring integrated bias resistors R1 = 22 kΩ and R2 = 47 kΩ (R1 ≠ R2), −40 V V_CEO, −50 mA I_C(max), and DC current gain (h_FE) of −68 at −10 mA/−10 V. It functions as an active-level inverter or digital switch in low-power logic interface circuits.

For engineers reviewing the DDTA124XUA-7-F datasheet, DDTA124XUA-7-F pinout, DDTA124XUA-7-F application, or DDTA124XUA-7-F equivalent, key selection criteria include input voltage thresholds (V_IN(on) = −1.4 V, V_IN(off) = −0.4 V), output saturation voltage (V_O(on) = −0.3 V), resistor tolerance (±30% for R1, ±20% for R2/R1 ratio), and thermal resistance (625 °C/W).

Technical Context

This device implements a monolithic PNP bipolar junction transistor with two discrete on-die base biasing resistors-R1 connected between base and emitter, R2 between base and collector-enabling single-resistor input drive and eliminating external bias network requirements. Its R1 ≠ R2 topology provides asymmetric switching thresholds ideal for level translation.

Designed for surface-mount logic interfacing, it operates with input voltages ranging from +10 V to −40 V and delivers −50 mA output current into saturated load conditions while maintaining guaranteed V_CE(sat) ≤ −0.3 V at I_C = −5 mA and I_B = −0.25 mA.

Key Specifications

Pinout & Package

Package: SOT-323 - ultra-small plastic surface-mount package (2.00–2.20 mm × 1.15–1.35 mm × 0.25–0.40 mm height), RoHS-compliant, moisture sensitivity level 1, weight ≈ 0.006 g.

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 and DDTA144VUA-7-F, DDTA124XUA-7-F offers balanced input sensitivity and output drive-ideal for general-purpose logic inversion where both 3.3 V and 5 V interfaces coexist and moderate speed is required.

Availability

DDTA124XUA-7-F is available at Aetrix Electronics and suitable for industrial sensor interface, microcontroller GPIO expansion, and automotive body control module applications requiring stable component supply and long-term production continuity.

Supply support for DDTA124XUA-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 DDTA (R1≠R2 Series) UA family-designed specifically for simplified digital switching in space- and cost-sensitive applications where integrated biasing eliminates design iteration on external resistor values.

FAQ

What is the maximum operating temperature for DDTA124XUA-7-F?

The device supports junction and storage temperatures from −55 °C to +150 °C. Its thermal resistance (R_θJA) is 625 °C/W on FR4 board with recommended pad layout (AP02001), meaning derating begins above 25 °C ambient-e.g., max power drops to ~120 mW at 70 °C ambient.

Can DDTA124XUA-7-F replace a standard PNP transistor like BC807?

No-it cannot directly replace a bare PNP transistor because it integrates base bias resistors. To substitute BC807, external R1 and R2 must be removed; DDTA124XUA-7-F is intended for designs where those resistors are omitted, reducing component count and layout complexity.

Is DDTA124XUA-7-F qualified for automotive applications?

While not AEC-Q101 certified out-of-box, its construction (epitaxial planar die, green molding compound, −55 °C to +150 °C rating) aligns with automotive under-hood requirements. Customers must validate per system-level qualification; Diodes Inc. offers AEC-Q101 versions under different part numbering (e.g., DDTA124XUAQ).

What does the "-7-F" suffix indicate in DDTA124XUA-7-F?

The "-7-F" denotes tape-and-reel packaging: 3000 units per reel, 8 mm tape width, 4 mm pocket pitch, and lead-free (matte tin) termination. This format is optimized for SMT placement and complies with JEDEC J-STD-020C moisture sensitivity level 1 handling requirements.