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All versions are No Longer Available. See Ordering Information for recommended replacements.

Data Sheet

FULL DATA SHEET (PDF, 492kB) Download   E-Mail

Description

The DS2120 Ultra3 LVD SCSI terminator is a low-voltage differential (LVD) terminator. If the device is connected in an LVD-only bus, the DS2120 uses LVD termination. If any single-ended (SE) or highvoltage differential (HVD) devices are connected to the bus, the DS2120 disconnects from the bus. This is accomplished inside the part automatically by sensing the voltage on the SCSI bus DIFFSENS line. For the LVD termination, the DS2120 integrates two current sources with nine precision resistor strings. Three DS2120 terminators are needed for a wide SCSI bus.

Key Features		Applications/Uses
Fully Compliant with Ultra3, Ultra160, Ultra320, and Ultra2 (LVD only) SCSI Provides Low-Voltage Differential (LVD) Termination for Nine Signal Line Pairs Zero Temperature Coefficient Termination Resistors Autoselection of LVD Termination 5% Tolerance on LVD Termination Resistance Low Power-Down Capacitance of 3pF Built-In Mode Change Filter/Delay On-Board Thermal Shutdown Circuitry SCSI Bus Hot Plug Compatible		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 - DS2120 Application Note 514: Connecting the DS2119M SCSI Terminator in Typical Applications - DS2120 Application Note 2007: The Advantages of Using Low-Voltage Differential (LVD) Devices in the SCSI Environment - DS2120 Application Note 3306: The Advantages of the DS2120 Low Voltage Differential (LVD) Device in a SCSI Environment - DS2120 Application Note 3523: Connecting the DS2125 SCSI Terminator in Wide-Bus Applications - DS2120

Design Guides

Interface (PDF)

Reliability Reports

Reliability Report: DS2120.pdf Request Reliability Report for: DS2120B DS2120E

Software/Models

DS2120E_LVD_27 IBIS Model

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: 1-8 of 8

DS2120B	Free Sample	Buy	Status	Recommended Replacement	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
DS2120B		N/A	No Longer Available		Land Pattern: Not Available	0°C to +70°C	See data sheet
DS2120B/T&R		N/A	No Longer Available		Land Pattern: Not Available	0°C to +70°C	See data sheet
DS2120E	Free Sample	Buy	Status	Recommended Replacement	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
DS2120E		N/A	No Longer Available		Land Pattern: Not Available	0°C to +70°C	See data sheet
DS2120E+		N/A	No Longer Available		Land Pattern: Not Available	0°C to +70°C	See data sheet
DS2120E+T&R		N/A	No Longer Available		Land Pattern: Not Available	0°C to +70°C	See data sheet
DS2120E/T&R		N/A	No Longer Available		Land Pattern: Not Available	0°C to +70°C	See data sheet
DS2120E/T&R+C08		N/A	No Longer Available	DS2120E	Land Pattern: Not Available	0°C to +70°C	See data sheet
DS2120E/T&R/C08		N/A	No Longer Available		Land Pattern: Not Available	0°C to +70°C	See data sheet

More Information

New Product Press Release 2002-05-01

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