UDN2981A

Power Distribution Switches, Load Drivers Overview

The UDN2981A is an octal source driver manufactured by Allegro MicroSystems, designed to interface low-level logic signals with high-current loads. It features eight independent output channels capable of sourcing up to 500 mA per channel. The device operates within a voltage range of 5V to 50V and includes transient protection on its outputs. It accepts TTL, DTL, PMOS, or CMOS compatible inputs and is housed in an 18-pin DIP package for through-hole mounting.

Power Distribution Switches, Load Drivers Feature Summary

• Octal configuration providing eight independent source driver channels
• High current output capability suitable for driving heavy loads
• Built-in transient protection on output channels
• Compatible with various logic families including TTL and CMOS

Power Distribution Switches, Load Drivers Applications

• Relay interfacing
• Solenoid control
• Lamp driving
• LED array powering

Power Distribution Switches, Load Drivers Procurement Notes

Verify component status as the UDN2981A may be discontinued by the manufacturer. Confirm availability through authorized distributors or surplus suppliers. Ensure the specific package variant matches system requirements. Check datasheet revisions for any updates to electrical characteristics or pin configurations before finalizing procurement decisions.

Power Distribution Switches, Load Drivers Selection Notes

Select this component when interfacing microcontrollers with high-current devices requiring source topology. Consider the 500mA per channel limit and total power dissipation constraints. Verify input logic levels match the controlling circuitry. Evaluate thermal management needs due to potential heat generation during continuous operation of multiple channels.

Power Distribution Switches, Load Drivers Part Context

This part belongs to Allegro's family of power distribution switches and load drivers. It serves as a bridge between digital logic circuits and analog loads. Similar parts in the lineup may offer different channel counts or sink capabilities. The UDN2981A specifically addresses applications needing robust source current delivery with integrated protection features.

Power Distribution Switches, Load Drivers Replacement Considerations

Check for direct substitutes from Allegro or other manufacturers offering identical pinouts and specifications. Verify that alternative components maintain the same 500mA source current rating and 50V maximum voltage. Ensure compatibility with existing PCB footprints and logic level requirements before substitution.