ULN2074B Quadruple Darlington Switches by STMicroelectronics

The ULN2074B, manufactured by STMicroelectronics, is a high-voltage, high-current Darlington transistor array designed to interface between low-level logic circuitry and multiple peripheral power loads. This robust integrated circuit is part of the ULN200x series, renowned for their reliability and ease of use in a wide variety of applications.

Each of the four independent Darlington pairs in the ULN2074B is capable of driving loads up to 1.5A with output voltages up to 50V. The inputs are compatible with popular logic levels, making this device suitable for interfacing with digital circuits such as microprocessors, microcontrollers, and other logic-based systems.

The ULN2074B features an array of diodes for transient suppression, which is essential for inductive loads. This internal clamp diodes provide protection against voltage spikes that occur when driving inductive loads, such as motors, solenoids, or relays. This protective feature ensures the longevity of both the switch and the connected components.

Key Features:

• Output Current (Single Output): 1.5A
• Output Voltage: 50V
• Input Voltage Range: Compatible with 5V TTL and CMOS
• Clamp Diodes: Integrated suppression diodes for inductive load transient suppression
• Package: Available in standard 16-pin DIP and SO-16 package
• Isolation: High isolation voltage between inputs and outputs for enhanced safety
• Mounting Type: Through-hole or Surface mount options available

The ULN2074B is an ideal choice for driving a wide range of loads in applications such as relay drivers, buffer drivers, stepper motors, and LED displays. Its robust design and integrated protection features make it a go-to solution for designers seeking a reliable and efficient means of interfacing logic circuits with higher power loads.

STMicroelectronics provides comprehensive technical support, including datasheets, reference designs, and application notes, to facilitate the integration of the ULN2074B into your projects. With its proven performance and STMicroelectronics' reputation for quality, the ULN2074B is a valuable addition to any power-driving application.