MCCS142237DT

Overview

The MCCS142237DT is a precision 9-bit switchable active SCSI-2 bus terminator manufactured by onsemi. It integrates an onboard 2.85V regulator to provide stable termination for high-speed data buses. The device operates within a supply voltage range of 3.9V to 5.25V and features a 110-ohm impedance characteristic compliant with SCSI-2 standards. Designed for reliable signal integrity, it supports switching capabilities to manage bus termination dynamically. The component is housed in a 20-pin TSSOP package and functions effectively within an operating temperature range of 0°C to +70°C.

Feature Summary

• Integrates an onboard 2.85V regulator for precise voltage management
• Provides 9-bit switchable active termination for SCSI-2 compatibility
• Ensures signal integrity through accurate 110-ohm impedance matching

Applications

• SCSI-2 bus termination in industrial systems
• High-speed data interface signal conditioning
• Precision electronic equipment requiring stable bus termination

Procurement Notes

Verify the specific suffix 'DT' corresponds to the required tape-and-reel packaging configuration when ordering. Confirm that the 20-pin TSSOP footprint matches the target PCB design constraints. Ensure the supply voltage environment remains strictly within the 3.9V to 5.25V operational limits to maintain regulator functionality. Cross-reference the 0°C to +70°C commercial temperature rating against the intended application's thermal profile to guarantee long-term reliability.

Selection Notes

Select this component when a precise, active termination solution is required for SCSI-2 interfaces rather than passive resistors. The integrated regulator simplifies board layout by eliminating external biasing components. Consider the 9-bit switching capability if dynamic termination control is necessary for system power management or bus arbitration. Verify that the commercial temperature range meets the environmental requirements of the deployment scenario.

Part Context

This part belongs to onsemi’s interface IC portfolio, specifically designed for legacy and specialized storage communication protocols. It addresses the need for accurate signal termination in systems utilizing SCSI-2 standards. The device complements other interface solutions by providing a compact, regulated termination option that reduces component count and improves overall system reliability in data-intensive applications.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Users must verify pinout and electrical parameter compatibility before considering alternative terminators from other manufacturers.