Diodes Incorporated DDTA143ZE-7-F

Overview

DDTA143ZE-7-F from Diodes Incorporated is a PNP pre-biased small-signal transistor in SOT523 package, featuring built-in bias resistors R1 = 4.7 kΩ and R2 = 47 kΩ (R1 ≠ R2), V_CEO = −50 V, I_C(MAX) = −100 mA, and DC current gain (h_FE) = 80 at −10 mA/−5 V. It is AEC-Q101 qualified and used for level-shifting and load switching in automotive body control modules.

For engineers reviewing the DDTA143ZE-7-F datasheet, DDTA143ZE-7-F pinout, DDTA143ZE-7-F application, or DDTA143ZE-7-F equivalent, key selection criteria include input voltage threshold (V_IN(ON) = −2.5 V @ I_O = −5 mA), output saturation voltage (V_CE(SAT) ≤ −0.3 V), resistor tolerance (±30% on R1, ±20% on R2/R1 ratio), and thermal resistance (R_θJA = 833 °C/W).

Technical Context

This device integrates a PNP bipolar transistor with two non-matching on-chip base bias resistors (R1 = 4.7 kΩ, R2 = 47 kΩ), enabling single-resistor input drive and eliminating external bias network design. Its −50 V V_CEO rating supports operation in 24 V automotive supply rails with transient margin.

The SOT523 package delivers 150 mW power dissipation on FR4 PCB with minimum pad layout, and its −55 °C to +150 °C operating range meets under-hood temperature requirements. Gain-bandwidth product is 250 MHz, confirming suitability for low-frequency switching-not RF amplification.

Key Specifications

Pinout & Package

SOT523 surface-mount plastic package (1.60 mm × 1.60 mm × 0.75 mm), UL 94V-0 rated, moisture sensitivity level 1, matte tin-plated leads.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DDTA143ZE-7-F, DDTA143Z-7-F offers identical electrical behavior but lacks automotive qualification, while NSVD60601LT1G extends voltage and current capability at the cost of larger SOT-23-3 footprint and higher unit price.

Availability

DDTA143ZE-7-F is available at Aetrix Electronics and suitable for automotive body electronics, industrial programmable logic controllers, and smart lighting control systems requiring stable component supply and long-term lifecycle support.

Supply support for DDTA143ZE-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 centers across Asia and manufacturing in China, Taiwan, and the US.

This part belongs to the DDTA R1≠R2 series of pre-biased transistors, designed specifically for reducing bill-of-materials count and improving reliability in automotive and industrial digital interface applications.

FAQ

What is the maximum allowable input voltage for reliable turn-on of DDTA143ZE-7-F?

The device guarantees turn-on at V_IN(ON) = −2.5 V (typical) with I_O = −5 mA and V_O = −0.3 V. Absolute maximum input voltage is −10 V per datasheet limits. Operating above −5 V risks excessive base current (>1.8 mA), increasing power dissipation beyond 150 mW rating on standard FR4 layout.

Can DDTA143ZE-7-F replace a discrete PNP transistor plus two external resistors?

Yes-it replaces a PNP transistor (e.g., MMBT3906) and two bias resistors (4.7 kΩ and 47 kΩ) in a single SOT523 package. The internal R1–R2 topology matches standard single-input pre-bias configuration, eliminating layout error risk and reducing PCB area by >60% versus discrete implementation.

Is the SOT523 package compatible with standard automated assembly processes?

Yes-SOT523 is supported by all major pick-and-place machines (e.g., Fuji NXT, Yamaha YSM20) and reflow profiles (J-STD-020 Level 1). Its 0.5 mm pitch and 0.22 mm lead width meet IPC-A-610 Class 2 requirements; stencil aperture recommendations are published in Diodes' package outline document DS00001.

Does DDTA143ZE-7-F support bidirectional signal translation?

No-it is a unidirectional PNP switch optimized for sinking current from a positive rail to ground. It lacks symmetrical input/output impedance or rail-to-rail voltage translation capability. For bidirectional level shifting, discrete MOSFET-based solutions or dedicated translators (e.g., TXB0104) are required.