Diodes Incorporated DDTB113ZU-7-F

Overview

DDTB113ZU-7-F from Diodes Incorporated is a PNP pre-biased transistor in SOT323 package with integrated 1 kΩ and 10 kΩ bias resistors, designed for digital switching applications requiring low-input-current control. It delivers V_I(OFF) = −0.3 V, V_I(ON) = −2.0 V (at I_O = −20 mA), V_O(ON) = −0.3 V, current gain G_L = 56, and maximum power dissipation of 200 mW.

For engineers reviewing the DDTB113ZU-7-F datasheet, DDTB113ZU-7-F pinout, DDTB113ZU-7-F application, or DDTB113ZU-7-F equivalent, key selection criteria include input voltage thresholds, resistor ratio (R1/R2 = 1:10), saturation performance at −50 mA output, thermal resistance (625 °C/W), and AEC-Q101 suitability for automotive signal conditioning.

Technical Context

This device integrates two precision biasing resistors (R1 = 1 kΩ, R2 = 10 kΩ) on a single PNP epitaxial planar die to eliminate external base-resistor networks in digital logic interface circuits. Its −0.3 V V_O(ON) and −2.0 V V_I(ON) support direct interfacing with 3.3 V and 5 V CMOS/TTL outputs while maintaining guaranteed turn-on under load.

The SOT323 package enables high-density PCB layouts and automated assembly, with moisture sensitivity level 1 per J-STD-020 and UL 94V-0 flammability rating. Absolute maximum ratings include V_CC = −50 V, I_C = −500 mA, and operating temperature range from −55 °C to +150 °C.

Key Specifications

Pinout & Package

Package: SOT323 - ultra-small surface-mount plastic package (2.15 mm × 2.10 mm × 0.95 mm), lead-free, halogen-free, 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 DDTB123YU-7-F and DDTB133HU-7-F, DDTB113ZU-7-F offers the lowest R1 (1 kΩ), delivering strongest base drive and fastest switching among the three - ideal for timing-critical or high-current digital loads where responsiveness outweighs input current savings.

Availability

DDTB113ZU-7-F is available at Aetrix Electronics and suitable for automotive door modules, industrial sensor interfaces, LED driver circuits, and microcontroller GPIO expansion requiring stable component supply despite its obsolete status per Diodes' ordering table.

Supply support for DDTB113ZU-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, industry-qualified components for automotive, industrial, and computing markets.

The DDTB series targets cost-sensitive, space-constrained digital switching applications - specifically engineered to replace discrete transistor + resistor combinations in logic interface, load switching, and signal conditioning functions.

FAQ

Is DDTB113ZU-7-F qualified for automotive use?

Yes - Diodes specifies that DDTB113ZU-7-F is manufactured in IATF 16949 certified facilities and supports PPAP documentation. While not explicitly marked "AEC-Q101 qualified" in DS30383 Rev. 7–2, its absolute maximum ratings (−55 °C to +150 °C), construction, and packaging meet baseline automotive environmental requirements. Customers requiring formal qualification should contact Diodes for PPAP-ready documentation.

What is the function of Pin 2 (Base) in DDTB113ZU-7-F?

Pin 2 is the internal node connecting R1 (1 kΩ) and R2 (10 kΩ). It serves as the input control terminal: applying a negative voltage relative to emitter (Pin 1) forward-biases the base-emitter junction, turning on the transistor. No external connection to this pin is required - it is internally accessed only through the R1–R2 network.

Can DDTB113ZU-7-F replace a standard PNP transistor like BC807?

No - DDTB113ZU-7-F is not a drop-in replacement for BC807. It lacks an exposed base terminal and relies entirely on its internal resistor network for biasing. Substitution requires redesigning the base drive circuit to accommodate fixed R1/R2 values and verify V_I(ON)/V_I(OFF) compatibility with the source logic family.

Why is DDTB113ZU-7-F marked as Obsolete in Diodes' ordering table?

Per DS30383 Rev. 7–2, DDTB113ZU-7-F is listed as Obsolete due to product line rationalization - likely superseded by newer variants (e.g., DDTB143EU-7-F) with broader availability. However, its electrical specifications remain valid, and Aetrix Electronics maintains legacy inventory with full traceability and lifecycle support for ongoing production programs.