UCC5630AMWP/2

Overview

The UCC5630AMWP/2 is a multimode SCSI terminator designed for SPI-2, SPI-3, and SPI-4 bus architectures. It automatically senses the bus via the DIFFB pin to switch between single-ended (SE) and low voltage differential (LVD) termination modes. The device operates on a TRMPWR supply of 2.7V to 5.25V. In LVD mode, the REG output provides a typical 1.25V reference with a source current range of -15mA to -5mA and sink current of 50µA to 200µA. Differential impedance is typically 105Ω. In SE mode, the REG output provides a typical 2.7V reference. The device features 3pF channel capacitance per line pair and includes failsafe biasing. It enters a high-impedance state if HVD devices are detected.

Feature Summary

• Automatically selects between Single Ended and Low Voltage Differential termination based on bus detection
• Integrated differential failsafe biasing to ensure signal integrity
• Supports active negation and master/slave input configuration
• Thermal packaging design for improved junction temperature management

Applications

• SPI-2 (Ultra2) SCSI bus termination
• SPI-3 (Ultra3/Ultra160) SCSI bus termination
• SPI-4 (Ultra320) SCSI bus termination

Procurement Notes

Verify the specific ordering suffix /2 against the manufacturer's latest documentation to confirm package type and availability status. The datasheet lists UCC5630AMWP as an active SSOP-36 device. Confirm that the /2 suffix does not indicate a non-standard variant or obsolete status by checking the official product selection guide. Ensure compatibility with RoHS and environmental compliance requirements specified in the orderable device table.

Selection Notes

Select this component for systems requiring automatic transition between SE and LVD SCSI modes without external logic. Verify that the system power supply remains within the 2.7V to 5.25V operating range. Ensure the PCB layout accommodates the 36-pin SSOP package dimensions and connects all HS/GND pins to ground planes for thermal dissipation. Confirm that the application does not involve HVD buses, as the device will enter a high-impedance state in such scenarios.

Part Context

The UCC5630A series serves as a multimode terminator for SCSI parallel interfaces, supporting legacy SE and modern LVD standards. The AMWP variant specifically denotes the 36-pin SSOP package option. This family simplifies termination network design by integrating both SE and LVD circuits into a single monolithic device, reducing board space compared to discrete solutions.

Replacement Considerations

UCC5630AFQP is the equivalent device in a 48-pin LQFP package. Both variants share identical electrical characteristics and functionality. Select the AFQP version only if the target PCB footprint requires a quad flat pack rather than a small-outline package.