DS21T05Z The DS21T05Z from Dallas Semiconductor is a SCSI Terminator IC. It provides active termination for nine signal lines with 110-ohm resistors.
Mfr Part #:

DS21T05Z

Available from 1 distributors
Mfr Name: Dallas Semiconductor
Dallas Semiconductor
The DS21T05Z from Dallas Semiconductor is a SCSI Terminator IC. It provides active termination for nine signal lines with 110-ohm resistors.
Total Stock: 200,000 pcs
$ Price Range: $3.00

DS21T05Z Available from 1 distributor

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Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
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200,000 pcs
200000 pcs On Request 1 On Request On Request On Request On Request On Request

DS21T05Z Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Mounting Type
Quiescent Current
SVHC Present

DS21T05Z Description

Short technical summary and product information.

The DS21T05Z is a SCSI Terminator IC manufactured by Dallas Semiconductor, designed for high-volume applications requiring active termination in SCSI systems. It is fully compliant with SCSI-1, Fast SCSI, and Ultra SCSI standards.

 

This component provides active termination for nine signal lines using laser-trimmed 110-ohm resistors with a 5% tolerance. It features a low dropout voltage and onboard thermal shutdown circuitry for reliability. The device supports actively negated SCSI signals and is SCSI bus hot-plug compatible.

 

Functionally compatible with the DS21T07, the DS21T05Z integrates a regulator and nine precise-switched termination resistors. It is available in a 16-pin plastic narrow SOIC package, suitable for surface mount applications. The power-down mode allows the termination resistors to be isolated from the bus, effectively removing the device from the circuit when not needed.

 

Designed for enhanced immunity to voltage drops on the TERMPWR line and improved high-level noise immunity, the DS21T05Z offers intrinsic TERMPWR decoupling and very low quiescent current consumption. Its design enables designers to gain the benefits of active termination in SCSI systems.

DS21T05Z Quick Information

Product Type: SCSI Terminator
Canonical Name: DS21T05Z SCSI Terminator
Subcategory: Real Time Clocks

DS21T05Z Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected
Lead Free: Lead Free

DS21T05Z Estimated Pricing

Qty Low High
1+ $3.00 $3.00

Estimated market price range - modelled values for guidance only, not live distributor offers.

DS21T05Z Features

  • Fully compliant with SCSI-1, Fast SCSI, Ultra SCSI
  • Provides active termination for nine signal lines
  • Laser-trimmed 110-ohm termination resistors
  • 5% tolerance on termination resistors
  • 16-pin plastic narrow SOIC package

DS21T05Z Applications

  • Active termination for SCSI bus segments
  • Enhances noise immunity in SCSI systems
  • Suitable for high-volume SCSI applications
  • Supports hot-plugging on SCSI bus

DS21T05Z FAQs

6 frequently asked questions generated from this part’s specifications.
What SCSI standards does the DS21T05Z comply with?

The DS21T05Z is fully compliant with SCSI-1, Fast SCSI, and Ultra SCSI.

How many signal lines does the DS21T05Z terminate?

The DS21T05Z provides active termination for nine signal lines.

What is the resistance tolerance of the termination resistors?

The laser-trimmed 110-ohm termination resistors have a 5% tolerance.

What package type is the DS21T05Z available in?

The DS21T05Z is available in a 16-pin plastic narrow SOIC package.

Does the DS21T05Z support power-down mode?

Yes, the DS21T05Z features a power-down mode that isolates termination resistors from the bus.

Is the DS21T05Z compatible with SCSI bus hot-plugging?

Yes, the DS21T05Z is SCSI bus hot-plug compatible.

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