A2982ELW-T

Overview

The A2982ELW-T is an eight-channel source driver designed for high-side switching applications. It supports load supply voltages up to 50 V and delivers output currents of 500 mA per channel. The device features TTL, DTL, PMOS, or CMOS compatible inputs and includes transient-protected outputs with a breakdown voltage capability. Packaged in a 20-SOIC surface-mount format, it interfaces low-level logic with high-current loads such as relays, solenoids, lamps, stepper motors, print hammers, and LEDs.

Feature Summary

• Eight independent channels providing high-side switching capability
• Compatible with TTL, DTL, PMOS, and CMOS logic families
• Integrated transient protection on all output channels
• Designed for separate logic and load ground configurations

Applications

• Relay driving circuits
• Solenoid actuation systems
• Lamp illumination control
• Stepper and servo motor interfaces
• Print hammer drivers

Procurement Notes

Verify component authenticity through authorized Allegro MicroSystems distributors. Confirm package marking matches the specific suffix requirements. Check datasheet revisions for any packaging changes. Ensure storage conditions comply with moisture sensitivity level specifications. Validate that the procurement source provides original manufacturer documentation.

Selection Notes

Select this component when interfacing low-voltage logic with high-current high-side loads requiring separate ground domains. Consider the 500 mA continuous current rating and 50 V breakdown voltage limits. Evaluate thermal performance for SOIC packaging constraints. Verify input compatibility with the controlling logic family before integration into the system design.

Part Context

This part belongs to the A2982 series of eight-channel source drivers from Allegro MicroSystems. It is functionally similar to the UDN2982 but offers specific packaging and electrical characteristics tailored for industrial applications. The series is designed for robust operation in environments requiring reliable high-side switching without complex external protection circuitry.

Replacement Considerations

The UDN2982LWTR is a documented substitute within the same functional family. Verify pinout compatibility and electrical parameter alignment before substitution. Ensure the replacement package matches the required board layout dimensions. Confirm that the substitute meets the same operating temperature range and current sourcing capabilities.