UCC5631AMWP

Overview

The UCC5631AMWP is a SCSI termination integrated circuit manufactured by Texas Instruments. It provides nine independent termination lines for SCSI, Low Voltage Differential (LVD), and Single-Ended (SE) applications. The device operates within a supply voltage range of 2.7 V to 5.25 V and draws a typical operating current of 20 mA. It features an internal resistance of 105 Ohms per line and supports a maximum power dissipation of 2 W. The component is housed in a 36-pin SSOP package with a width of 7.50 mm. It is designed for surface mount installation and functions reliably across an operating temperature range from 0°C to +70°C.

Feature Summary

• Integrates nine independent termination channels for simultaneous SCSI bus management
• Supports multiple signaling standards including LVD and SE configurations
• Includes internal 105 Ohm resistors to simplify circuit design

Applications

• SCSI interface termination for peripheral devices
• Low Voltage Differential (LVD) bus termination
• Single-Ended (SE) SCSI bus termination

Procurement Notes

This component is officially discontinued by the manufacturer. Availability is limited to surplus stock held by third-party distributors such as Rochester Electronics. Verification of part authenticity and lot traceability is critical when sourcing from non-OEM channels due to the end-of-life status. Buyers should confirm the specific revision level and packaging condition before acquisition.

Selection Notes

Designers requiring this specific nine-line termination configuration must account for the component's discontinued status. Alternative solutions may require discrete resistor networks or newer generation interface controllers that support similar pin counts. Verify that the 36-SSOP footprint matches existing board layouts if replacing legacy designs. Ensure the 2.7 V to 5.25 V supply range aligns with the target system's power architecture.

Part Context

The UCC5631A series belongs to Texas Instruments' portfolio of SCSI interface components. This specific model addresses the need for compact, multi-channel termination in legacy storage systems. It serves as a specialized solution for managing signal integrity on SCSI buses without requiring external passive components for each line.

Replacement Considerations

Public confirmed substitute part numbers are not available for this discontinued item. Designers should evaluate discrete resistor arrays or modern interface ICs with equivalent channel counts and electrical specifications.