UC5603QPTR

Overview

The UC5603QPTR is a 9-line active terminator for SCSI parallel buses, compliant with SCSI, SCSI-2, and SPI-2 standards. It operates within a Termpwr voltage range of 3.8 V to 5.25 V and supports signal line voltages from 0 V to 5 V. The device provides -400 mA sourcing current for termination and +400 mA sinking current for active negation drivers. It features a typical channel capacitance of 6 pF during disconnect mode and draws 100 µA supply current in power-down mode. The unit is housed in a 28-pin PLCC package.

Feature Summary

• Provides 9 lines of active termination for SCSI parallel bus applications
• Features logic command disconnects that disable the regulator and reduce standby power
• Includes negative clamping on all signal lines to protect external circuitry from latch-up
• Offers internal trimming for impedance and output current to maximize noise margin

Applications

• SCSI wide bus configurations requiring active termination
• Interim points on the bus where low channel capacitance minimizes signal integrity impact
• Systems requiring compliance with SCSI hot plugging standards

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific ordering suffix matches the required package type and temperature rating. Review the latest datasheet for any updates regarding lifecycle status or environmental compliance documentation before finalizing procurement orders.

Selection Notes

Select this component when designing systems requiring 9-line active termination for SCSI interfaces. Ensure the design accommodates the 28-pin PLCC package dimensions and thermal requirements. Verify that the application environment falls within the specified operating temperature range and voltage limits for reliable performance.

Part Context

This part belongs to the UC5603 family of SCSI active terminators manufactured by Texas Instruments. It serves as a specialized interface solution for managing signal termination on parallel data buses, ensuring signal integrity and compliance with established industry communication standards.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.