SCSI Terminator

Overview

Technical Documents

Ordering Info

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Status

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

Description

Fast SCSI and Ultra SCSI require the use of active terminations at both ends of every cable segment in a SCSI system with single-ended drivers and receivers. The DS2105 SCSI terminator, which is fully compliant with these standards, enables the designer to gain the benefits of active termination: greater immunity to voltage drops on the TERMPWR (TERMination PoWeR) line, enhanced high-level noise immunity, intrinsic TERMPWR decoupling, and very low quiescent current consumption. The DS2105, which integrates a regulator and nine precise switched 110 ohm termination resistors into a monolithic IC, is a functionally compatible version of the DS21S07A. With relaxed output current and termination tolerances, the DS2105 is intended for high volume applications which require active termination but not the high performance of the DS21S07A. The DS2105 is offered in both 300mil and 150mil SO packages.

Data Sheet

Download	Rev 1	(PDF, 112kB)
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Key Features

Fully compliant with SCSI-1, Fast SCSI and Ultra SCSI
Functionally compatible to the DS21S07A, targeted for high volume applications
Provides active termination for nine signal lines
Laser-trimmed 110 ohm termination resistors have 5% tolerance
Low dropout voltage
Power-down mode isolates termination resistors from the bus
Fully supports actively negated SCSI signals
On-board thermal shutdown circuitry
16-pin plastic SO (DS2105)

Reliability Reports

Reliability Report:

DS2105.pdf

Software/Models

none

Ordering Information

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Part Number:

Package:

Temperature:

Tape and Reel

Sample

Part Number	Free Sample	Buy	Status	Recommended Replacement	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
DS2105S/T&R		N/A	No Longer Available	DS21T05S/T&R	SOIC; Land Pattern: Not Available	0°C to +70°C	See data sheet
DS2105Z		N/A	No Longer Available	DS21T05Z	SOIC(N);16 pin;61.9 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0097 (PDF) Use pkgcode/variation: S16-1*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
DS2105Z+		N/A	No Longer Available		SOIC(N);16 pin;61.9 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0097 (PDF) Use pkgcode/variation: S16+1*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS2105Z/T&R		N/A	No Longer Available	DS21T05Z/T&R	SOIC; Land Pattern: Not Available	0°C to +70°C	See data sheet
DS2105Z/T&R+C02		N/A	No Longer Available	DS2105Z/T&R/C02	SOIC; Land Pattern: Not Available	0°C to +70°C	See data sheet
DS2105Z/T&R/C02		N/A	No Longer Available	DS2105Z/T&R+C02	SOIC; Land Pattern: Not Available	0°C to +70°C	See data sheet

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; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product 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.

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Information Index

Overview		Technical Documents		Ordering Info		Related Products
Description Key Features Applications/Uses Key Specifications Diagram Notes and Comments		Data Sheet Application Notes Evaluation Kits Product Guides Reliability Reports Software/Models		Price and Availability Samples Buy Online Package Information Lead-Free Information		Similar Products by Function Similar Products by Application Evaluation Kits Products with Similar Part Numbers Products Used With This

Rev 1; 1998-02-26
This page last modified: 2007-06-21