MC34268DG

Overview

The MC34268DG is a fixed-output low-dropout voltage regulator manufactured by onsemi, designed for SCSI-2 active termination applications. It provides a stable 2.85V output with a maximum input voltage of 15V. The device features a single output channel and operates within an extended temperature range of 0°C to 125°C. Packaged in an 8-SOIC surface-mount case (0.154 inch width), it ensures reliable performance in industrial environments while meeting RoHS3 compliance standards.

Feature Summary

• Provides a fixed 2.85V output specifically optimized for SCSI-2 active terminator circuits
• Operates reliably across an extended industrial temperature range up to 125°C
• Complies with RoHS3 environmental standards for restricted substances

Applications

• SCSI-2 bus active termination
• Low dropout voltage regulation for peripheral interfaces
• Industrial control system power management

Procurement Notes

Verify the specific suffix 'DG' corresponds to tube packaging and RoHS3 compliance when sourcing. Confirm current availability status as distribution channels may vary. Ensure the application design accounts for the 15V maximum input rating and thermal dissipation requirements inherent to the SOIC-8 package configuration.

Selection Notes

Select this component when a precise 2.85V rail is required for legacy SCSI-2 interface termination. The wide operating temperature range supports harsh industrial conditions. Verify that the 8-SOIC footprint aligns with existing PCB layout constraints and that the single-channel output meets the target circuit's current demands without requiring parallel configurations.

Part Context

This part belongs to the MC34268 series of specialized linear regulators. It serves as a dedicated solution for maintaining signal integrity in SCSI-2 systems by providing consistent termination voltage. The DG variant distinguishes itself through its specific packaging format and regulatory compliance status compared to other suffixes in the family.

Replacement Considerations

MC34268D is a related variant; verify if the older non-RoHS3 specification or different packaging affects the specific design requirements.