UDN2981A

UDN2981A High-Voltage High-Side Driver – Overview, Specs, and Applications

The UDN2981A from Allegro MicroSystems is an 8-channel high-side driver IC designed for controlling inductive and resistive loads such as LEDs, relays, and solenoids. It features a wide load voltage range from 5V to 50V and supports up to 500mA per output channel. This device is especially useful in applications where direct interface with logic-level signals is required to switch high-current or high-voltage loads. Please note, the UDN2981A is now obsolete, but still sought after for legacy systems and repair purposes.

✅ UDN2981A Datasheet PDF Download

📄 Click here to download the official UDN2981A datasheet (PDF)

✅ Key Features

• 8 high-side driver channels
• 500mA output current per channel
• Wide load voltage support: 5V ~ 50V
• No logic supply voltage (Vcc) required
• Non-inverting TTL-compatible inputs
• Ideal for driving relays, solenoids, and LEDs
• On/Off interface control
• Industry-standard 18-DIP through-hole package

✅ UDN2981A Technical Specifications

✅ Application Scenarios

• Industrial automation and control
• LED display panels and signage
• Relay driver circuits
• Solenoid actuators in embedded systems
• Legacy system maintenance and repair

🛒 Buy UDN2981A or Find Alternatives

Looking for UDN2981A or equivalent parts? Contact Onzuu, your trusted electronic component distributor. We offer sourcing, BOM services, and global delivery.

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✅ Why Choose Onzuu as Your Distributor

At Onzuu, we specialize in sourcing hard-to-find and obsolete components like the UDN2981A. Whether you're building legacy support systems or repairing aging industrial equipment, Onzuu ensures:

• Genuine parts from verified global sources
• Fast international shipping
• Professional B2B supply chain support
• Custom procurement services for bulk orders

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✅ Frequently Asked Questions (FAQ)

Q: Is UDN2981A still in production?

A: No, UDN2981A is listed as Obsolete, but available through surplus and legacy part suppliers.

Q: What is a good replacement for UDN2981A?

A: You can consider using ULN2003A (low-side) or TPIC6C595 (for serial control), depending on your voltage/current needs and configuration.

Q: What type of loads can UDN2981A drive?

A: It is ideal for driving LEDs, relays, and other resistive/inductive loads up to 500mA per channel.

Q: Is UDN2981A a low-side or high-side driver?

A: UDN2981A is a high-side driver.

✅ Summary

The UDN2981A remains a popular choice for legacy systems requiring an 8-channel high-side driver with up to 500mA output. Though now obsolete, it continues to be used in critical applications across industrial and embedded systems. If you’re in need of replacement or procurement support, Onzuu is here to help.