UCC5618PWPTR/2

Overview

The UCC5618PWPTR/2 is an 18-line SCSI active terminator manufactured by Texas Instruments. It is designed for high-speed data transmission applications requiring reliable bus termination. The device operates within a supply voltage range of 3V to 5V and supports hot insertion without causing system disturbances. It features low output capacitance to maintain signal integrity at high frequencies. The component is housed in a 28-pin TSSOP package with a wide operating temperature range from -40°C to +85°C, suitable for industrial environments.

Feature Summary

• Supports hot insertion for continuous system operation during maintenance or upgrades
• Provides active termination for 18-line SCSI buses to reduce signal reflections
• Features low output capacitance to preserve high-frequency signal quality
• Integrates power-on reset circuitry for stable initialization

Applications

• SCSI disk drive arrays requiring active termination
• High-speed peripheral interface modules
• Industrial control systems with SCSI connectivity

Procurement Notes

Verify the specific suffix /2 against official Texas Instruments documentation to confirm temperature grade or packaging variations. Ensure compatibility with existing 18-line SCSI architectures before procurement. Cross-reference the manufacturer part number with authorized distributors to avoid counterfeit components. Confirm RoHS compliance status through the latest datasheet revision.

Selection Notes

Select this component when designing SCSI interfaces that require active termination rather than passive resistors. Consider the 28-pin TSSOP package constraints for PCB layout. Evaluate the thermal performance within the specified -40°C to +85°C range for the target application environment. Compare pinout compatibility with legacy SCSI terminator designs if replacing existing hardware.

Part Context

This part belongs to the UCC5618 family of SCSI terminators from Texas Instruments. It serves as a specialized solution for maintaining signal integrity in parallel SCSI systems. The device addresses the limitations of passive termination by actively adjusting impedance based on bus state. It is distinct from general-purpose logic ICs due to its specific interface protocol support.

Replacement Considerations

Publicly confirmed substitutes include the UCC5618DWPG4 and UCC5618QPTR. Verify pin-to-pin compatibility and electrical specifications before substitution. Ensure the replacement part meets the same 18-line SCSI termination requirements.