UCC5630AFQP

Overview

The UCC5630AFQP is a multimode SCSI terminator designed for LVD and SE bus architectures. It operates within a TRMPWR voltage range of 2.7V to 5.25V and supports temperatures from 0°C to 70°C. The device provides differential termination with an impedance of 105 Ohms typical, while single-ended termination offers 110 Ohms typical. It features a DIFSENS output voltage of 1.3V typical in LVD mode and 2.7V in SE mode. Supply current reaches 20mA typical in LVD mode and 10mA in SE mode. The component utilizes a 48-pin LQFP package.

Feature Summary

• Automatically detects and switches between Single Ended (SE) and Low Voltage Differential (LVD) SCSI modes based on the DIFSENS signal level.
• Integrates all analog functions required for SPI-2, SPI-3, and SPI-4 bus architectures into a single monolithic device.
• Includes fail-safe biasing and high impedance state activation when High Voltage Differential (HVD) devices are detected.

Applications

• Termination for Ultra2 (SPI-2), Ultra3 (SPI-3), and Ultra320 (SPI-4) SCSI parallel interfaces.
• Multi-mode active termination applications where SE and LVD devices coexist on the same bus.
• End-of-bus termination networks requiring automatic mode selection without external logic.

Procurement Notes

Verify the specific suffix FQP corresponds to the 48-pin LQFP package configuration before ordering. Confirm that the operating environment remains within the specified 0°C to 70°C temperature range. Ensure the power supply voltage stays strictly between 2.7V and 5.25V to maintain proper functionality and avoid exceeding absolute maximum ratings.

Selection Notes

Select this component only for SCSI buses utilizing LVD or SE signaling standards. Do not use for HVD or EIA485 differential buses as the device enters a high impedance state upon detecting HVD signals. Ensure the design accommodates the thermal requirements of the LQFP package by connecting HS/GND pins to adequate ground planes for heat dissipation.

Part Context

This part belongs to the UCC5630A family of multimode SCSI terminators manufactured by Texas Instruments. The UCC5630A series addresses the transition requirements between legacy SE and modern LVD SCSI standards. The AFQP variant specifically denotes the lead-free, halogen-free version housed in the 48-lead LQFP package suitable for surface mount assembly.

Replacement Considerations

The UCC5630AMWP serves as the functional equivalent in a 36-pin SSOP package. Verify pinout compatibility and thermal performance differences when substituting packages. No other direct cross-model replacements are documented in the official datasheet.