The ULN2003A is a high-voltage, high-current Darlington transistor array designed by Texas Instruments. This integrated circuit consists of seven NPN Darlington pairs that feature high-voltage outputs with common-cathode clamp diodes for switching inductive loads. The collector-current rating of a single Darlington pair is 500 mA, making it suitable for interfacing with relays, motors, and other high-current or high-voltage loads on a microcontroller or logic system.

Key Features

• Seven Darlington pairs per package
• Output current 500 mA per driver (600 mA peak)
• Output voltage 50 V
• Integrated suppression diodes for inductive loads
• Outputs can be paralleled for higher current
• Inputs compatible with various types of logic, including TTL, PMOS, and CMOS
• The package includes DIP, SOIC, SOP, and TSSOP options

Applications

The ULN2003A is incredibly versatile and can be used in a wide range of applications. It is particularly well-suited for driving high-current loads in various electronic projects and commercial devices. Common applications include:

• Relay drivers
• Stepper motor drivers
• LED displays/LED matrix drivers
• Buffer drivers
• Logic buffers
• Lamp drivers

Technical Specifications

For detailed information, datasheets, and support resources, please visit the official Texas Instruments product page for the ULN2003A Darlington Transistor Array.