DS2119ME+

Overview

The DS2119ME+ is a multimode SCSI terminator supporting Ultra320, Ultra160, SPI-4, SPI-3, and SPI-2 standards. It provides termination for nine signal line pairs in both Low-Voltage Differential (LVD) and Single-Ended (SE) modes. The device operates on a 5V supply within a 0°C to +70°C temperature range. Electrical specifications include an SE termination resistance of 110Ω with 5% tolerance, an LVD differential resistance of 110Ω, and an output capacitance of 3pF. It features integrated thermal shutdown at 150°C and hot-plug compatibility.

Feature Summary

• Autoselects between LVD and SE termination modes by sensing the DIFFSENS voltage level
• Supports actively negated SE SCSI signals with dedicated power amplifier sinking capability
• Isolates termination pins from the bus when High-Voltage Differential (HVD) devices are detected
• Integrates digital filtering on the DIFFSENS control line to prevent erroneous mode switching

Applications

• Termination for Ultra320 and Ultra160 SCSI parallel interface buses
• Backward-compatible termination for legacy Single-Ended SCSI systems
• Hot-pluggable SCSI peripheral connections requiring multimode support

Procurement Notes

Verify component authenticity through authorized distributors or manufacturer channels. Confirm RoHS compliance status via official documentation as lead-free variants exist. Check datasheet revisions for updates regarding pin configurations or electrical characteristics before finalizing procurement plans.

Selection Notes

Select this component for designs requiring automatic transition between LVD and SE signaling without external logic. Ensure the application supports the required 5V Termpower supply. Verify that the 28-TSSOP package dimensions fit the PCB layout constraints and thermal requirements.

Part Context

This part belongs to the DS2119M series of SCSI terminators manufactured by Analog Devices Inc./Maxim Integrated. It serves as a specialized interface solution for high-speed data transfer environments utilizing Small Computer System Interface protocols.

Replacement Considerations

Public confirmed substitute part numbers: DS2119ME, DS2119ME/T&R, DS2119ME+T&R.