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Part Number	Status
DS2125	This product is No Longer Available. See Ordering Information for recommended replacements.

Data Sheet

FULL DATA SHEET (PDF, 188kB) Download   E-Mail

Description

The DS2125 Ultra3 LVD/SE SCSI terminator is both a low-voltage differential (LVD) and single-ended (SE) terminator. The multimode operation enables the designer to implement LVD in current products while allowing the end user SE backward compatibility with legacy devices. If the device is connected in an LVD-only bus, the DS2125 uses LVD termination. If any SE devices are connected to the bus, the DS2125 uses SE termination, which is accomplished automatically inside the part by sensing the voltage on the SCSI bus DIFFSENS line. For the LVD termination, the DS2125 integrates two current sources with 15 precision resistor strings. For the SE termination, one regulator and 15 precision 110Ω resistors are used. Two DS2125 terminators are needed for a wide SCSI bus.

Key Features		Applications/Uses
Fully Compliant with Ultra3 SCSI Provides Multimode Low-Voltage Differential/Single-Ended (LVD/SE) Termination for 15 Signal Line Pairs Auto-Selection of LVD or SE Termination 5% Tolerance on SE and LVD Termination Resistance Low 3pF Power-Down Capacitance On-Board Thermal-Shutdown Circuitry SCSI Bus Hot-Plug Compatible Fully Supports Actively Negated SE SCSI Signals		Network-Attached Storage (NAS) RAID Systems SCSI Cables SCSI Host Bus Adapter (HBA) Cards Servers Storage Area Networks (SANs)

Application Notes

Application Note 510: SCSI Bus Configuration For MSTR/SLV Connections - DS2125 Application Note 514: Connecting the DS2119M SCSI Terminator in Typical Applications - DS2125 Application Note 3306: The Advantages of the DS2120 Low Voltage Differential (LVD) Device in a SCSI Environment - DS2125 Application Note 3523: Connecting the DS2125 SCSI Terminator in Wide-Bus Applications - DS2125

Design Guides

Interface (PDF)

Reliability Reports

Reliability Report: DS2125.pdf

Software/Models

none

Ordering Information

Notes: Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day. Part number suffixes: T or T&R = tape and reel;+ = RoHS/lead-free;# = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

Devices: 1-4 of 4

DS2125	Free Sample	Buy	Status	Recommended Replacement	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
DS2125+		N/A	No Longer Available		Land Pattern: Not Available	0°C to +70°C	See data sheet
DS2125/T&R+C01		N/A	No Longer Available	DS2125	Land Pattern: Not Available	0°C to +70°C	See data sheet
DS2125-C01/T&R		N/A	No Longer Available		Land Pattern: Not Available	0°C to +70°C	See data sheet
DS2125		N/A	No Longer Available		LQFP;48 pin;83 mm² Outline Drawing: 21-0054 (PDF) Land Pattern: 90-0093 (PDF) Use pkgcode/variation: C48-2*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis

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New Product Press Release 2003-04-17

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