DS2125/T&R

$2.13

Description：IC TERM SCSI ULT3 LVD/SE 48-LQFP
Series：-

SKU:8dbef91484fa Category: Signal Terminators Brand: Analog Devices Inc./Maxim Integrated

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Product introduction

Product Detailed Parameters

Description：IC TERM SCSI ULT3 LVD/SE 48-LQFP
Series：-
Mfr：Analog Devices Inc./Maxim Integrated
Package：Tape & Reel (TR)
Type：SCSI, LVD, SE
Number of Terminations：15
Voltage - Supply：2.7V ~ 5.5V
Operating Temperature：0°C ~ 70°C
Mounting Type：Surface Mount
Package / Case：48-LQFP
Supplier Device Package：48-LQFP (7x7)

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DS2125/T&R

Overview

The DS2125/T&R is an Ultra3 LVD/SE SCSI terminator manufactured by Analog Devices Inc./Maxim Integrated. It provides multimode termination for 15 signal line pairs, automatically selecting between Low-Voltage Differential (LVD) and Single-Ended (SE) modes via the DIFFSENS line. The device operates within a TPWR supply range of 2.7V to 5.5V for LVD mode and 4.0V to 5.5V for SE mode. It features 110Ω differential termination resistance with 5% tolerance, low 3pF power-down capacitance, and on-board thermal shutdown at 150°C. Packaged in a 48-pin LQFP with tape and reel delivery.

Feature Summary

Fully compliant with Ultra3 SCSI standards
Auto-selection of LVD or SE termination based on bus voltage
Supports actively negated SE SCSI signals
SCSI bus hot-plug compatible

Applications

Raid Systems
SCSI Host Bus Adapter (HBA) Cards
Servers
Network Attached Storage (NAS)
Storage Area Networks (SANs)

Procurement Notes

Verify the specific revision against the manufacturer's errata sheet before integration, as deviations from published specifications may exist. Confirm that the 48-pin LQFP package aligns with the PCB footprint requirements. Ensure the tape and reel packaging matches the automated assembly equipment specifications. Validate component authenticity through authorized distribution channels.

Selection Notes

Select this component when designing systems requiring simultaneous support for legacy single-ended devices and modern low-voltage differential buses. The automatic mode switching eliminates the need for manual configuration. Ensure adequate decoupling capacitors are placed near the VREF and TPWR pins to maintain stable regulation during high-speed data transfers.

Part Context

This part belongs to the DS2125 family of SCSI interface integrated circuits designed for high-performance storage connectivity. It serves as a critical interface component for managing signal integrity across mixed-mode SCSI environments. The device integrates precision resistor strings and regulators to ensure accurate termination impedance matching.