A6812ELW

Overview

The Allegro MicroSystems A6812ELW-T is a discontinued power driver IC designed for high-side load switching applications. It features a 1:20 input-to-output ratio, providing twenty independent bipolar outputs. The device operates with a supply voltage range of 3V to 5.5V and supports a maximum load voltage of 60V. Each output channel delivers a maximum current of 40mA. It utilizes a latch driver topology with non-inverting input logic and supports both parallel and serial interface configurations. The component is housed in a 28-SOIC surface-mount package and is rated for an operating temperature range of -40°C to 85°C.

Feature Summary

• Provides twenty independent high-side bipolar outputs for load switching
• Supports flexible control via parallel or serial interface options
• Features a latch driver topology for stable state retention
• Operates within a standard 3V to 5.5V supply voltage range

Applications

• High-side switching for automotive lighting systems
• Control of multiple loads in industrial automation equipment
• Power distribution management in electronic control units

Procurement Notes

Verify component authenticity carefully as the A6812ELW-T is officially obsolete and no longer manufactured by Allegro MicroSystems. Confirm that any available inventory represents genuine stock rather than refurbished units. Check datasheet revisions and packaging changes, such as the tape change noted in January 2023, to ensure compatibility with existing assembly processes. Validate RoHS compliance status, as variations exist between tube and reel packaging versions regarding environmental specifications.

Selection Notes

Select this component only if legacy design compatibility is required, as it is not recommended for new designs. Ensure the application requires exactly twenty high-side channels with a 1:20 control ratio. Verify that the system voltage does not exceed the 60V load limit and that the 40mA per-channel current capability meets the load requirements. Consider pin-compatible alternatives from other manufacturers if long-term supply stability is a priority.

Part Context

The A6812 belongs to Allegro MicroSystems' family of power drivers designed for managing multiple loads efficiently. This specific model distinguishes itself through its high channel count and dual-mode interface support. It serves as a bridge between low-power logic controllers and higher-power loads, simplifying board layout by integrating drive circuitry for twenty channels into a single compact package.

Replacement Considerations

Public confirmed substitute part numbers include MAX6921AWI+ and MAX6921AWI+T from Analog Devices Inc./Maxim Integrated. These components are listed as similar replacements for the obsolete Allegro part.