Diodes Incorporated DDTA124XKA-7-F

Overview

DDTA124XKA-7-F from Diodes Incorporated is a PNP pre-biased small-signal transistor in SC-59 package with R1 = 22 kΩ and R2 = 47 kΩ bias resistors, V_CEO = −50 V, I_C(max) = −50 mA, and DC current gain (h_FE) ≥ 68 at I_C = −10 mA, used for level-shifting and digital switching in low-power logic interface circuits.

For engineers reviewing the DDTA124XKA-7-F datasheet, DDTA124XKA-7-F pinout, DDTA124XKA-7-F application, or DDTA124XKA-7-F equivalent, key selection criteria include input voltage thresholds (V_IN(on) = −1.4 V), output saturation voltage (V_CE(sat) ≤ −0.3 V), resistor tolerance (±30% on R1), resistance ratio tolerance (±20% on R2/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 bias resistors (R1 ≠ R2), enabling direct logic-level drive without external base resistors. It operates as an inverting switch with guaranteed turn-on at V_IN ≤ −1.4 V and maintains V_OUT ≤ −0.3 V under −2 mA load.

The SC-59 surface-mount package supports automated assembly and delivers 200 mW power dissipation with J-STD-020C Level 1 moisture sensitivity. Its epitaxial planar die construction ensures stable h_FE across −55 °C to +150 °C operating range and supports high-frequency operation up to f_T = 250 MHz.

Key Specifications

Pinout & Package

Package: SC-59 (SOT-23 variant), molded plastic case with UL 94V-0 flammability rating, matte tin-plated copper leadframe, and moisture sensitivity Level 1 per J-STD-020C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DDTA114YKA-7-F and DDTA144VKA-7-F, DDTA124XKA-7-F offers balanced input sensitivity and bias efficiency-ideal for general-purpose 3.3 V/5 V logic translation where neither extreme low-threshold nor ultra-low-leakage is required.

Availability

DDTA124XKA-7-F is available at Aetrix Electronics and suitable for logic level translation, microcontroller GPIO expansion, and low-power signal inversion requiring stable component supply and long-term manufacturability.

Supply support for DDTA124XKA-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, energy-efficient components for industrial, computing, and consumer markets.

This part belongs to the DDTA R1≠R2 Series of pre-biased transistors, designed specifically to simplify digital interface design by integrating matched bias networks into standard SMT packages for plug-and-play logic compatibility.

FAQ

What is the absolute maximum collector-emitter voltage for DDTA124XKA-7-F?

The absolute maximum V_CEO is −50 V at T_A = 25 °C. This rating applies with the emitter grounded and collector reverse-biased; derating is required above 25 °C per the 200 mW power limit and 625 °C/W thermal resistance curve.

Can DDTA124XKA-7-F replace a standard PNP transistor like BC807 in a circuit?

Yes, but only if the circuit relies on external base biasing. DDTA124XKA-7-F includes internal R1 (22 kΩ) and R2 (47 kΩ), so replacing a discrete PNP requires removing those external resistors and verifying that the resulting input impedance and switching thresholds meet system requirements.

What does the "KA" suffix indicate in DDTA124XKA-7-F?

The "KA" suffix denotes the SC-59 package variant with green (halogen-free) molding compound and matte tin lead finish, compliant with RoHS Directive 2011/65/EU and meeting UL 94V-0 flammability standards for surface-mount assembly.

Is DDTA124XKA-7-F suitable for automotive applications?

No-this device is not AEC-Q101 qualified. While it operates from −55 °C to +150 °C, Diodes Incorporated does not certify the DDTA R1≠R2 Series for automotive use; qualified alternatives such as the DXT7010Q series should be selected for automotive-grade designs.