DS2119ME/T&R

Overview

The DS2119ME/T&R is a SCSI interface integrated circuit designed as an Ultra3 LVD/SE terminator. It provides multimode termination for nine signal line pairs, supporting Low-Voltage Differential and Single-Ended signaling. The device operates at a supply voltage of 5V within a temperature range of 0°C to +70°C. It utilizes a 28-pin TSSOP package with Tape and Reel packaging. Electrical specifications include SE termination resistance of 110Ω (±5%), differential mode termination resistance of 110Ω, common mode termination resistance of 190Ω, and output capacitance of 3pF.

Feature Summary

• Autoselection between LVD and SE termination modes based on bus voltage sensing
• Integrated thermal shutdown circuitry for protection
• Supports actively negated SE SCSI signals
• Compatible with SCSI bus hot plug operations

Applications

• Ultra3 LVD/SE SCSI bus termination
• SPI-2, SPI-3, and SPI-4 compliant systems
• Legacy SE device backward compatibility integration

Procurement Notes

Verify the specific ordering suffix required for tape and reel packaging when sourcing this component. Confirm lead-free status if RoHS compliance is mandatory for the assembly process. Check current availability as distribution channels may vary for obsolete or end-of-life products.

Selection Notes

Select this component for designs requiring automatic switching between LVD and SE termination modes without external control logic. Ensure the design accommodates the 28-TSSOP footprint and provides adequate thermal grounding via the HS GND pins. Verify that the system power supply meets the 4V to 5.5V operating range.

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 parallel data transmission standards. The 'T&R' suffix indicates the specific bulk packaging format used for automated surface mount assembly processes.

Replacement Considerations

DS2119ME+T&R