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DS21T27

Features: • Fully compliant with SCSI, Fast SCSI and Ultra SCSI• Provides active termination for 27 signal lines• 5% tolerance on termination resistance and termination current• Low power down capacitance of 3 pF• Onboard thermal shutdown circuitry• SCSI bus hot...

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SeekIC No. : 004328826 Detail

DS21T27: Features: • Fully compliant with SCSI, Fast SCSI and Ultra SCSI• Provides active termination for 27 signal lines• 5% tolerance on termination resistance and termination currentR...

DS21T27 Data Sheet

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Part Number:
DS21T27
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

• Fully compliant with SCSI, Fast SCSI and Ultra SCSI
• Provides active termination for 27 signal lines
• 5% tolerance on termination resistance and termination current
• Low power down capacitance of 3 pF
• Onboard thermal shutdown circuitry
• SCSI bus hotplug compatible
• Fully supports actively negated SCSI signals
• Active low powerdown


Pinout

Connection Diagram


Specifications

Voltage on Any Pin Relative to Ground                           1.0V to +7.0V
Operating Temperature                                                  0°C to 70°C
Storage Temperature                                                     55°C to +125°C
Soldering Temperature                                                    260°C for 10 seconds


Description

Fast SCSI and Ultra SCSI require the use of active termination at both ends of every cable segment in a SCSI system with single ended drivers and receivers. Ultra SCSI requires the support of active negation and hot plugging. The DS21T27 is fully compliant with these standards.

The DS21T27 integrates a low drop out regulator and 27 precise switched 110 Ohm termination resistors into a 36 pin SSOP package.

Active termination provides greater immunity to voltage drops on the TERMPWR (termination power) line, enhanced high level noise immunity, intrinsic TERMPWR decoupling, and very low quiescent current. A single DS21T27 can be used to terminate a wide SCSI bus (27 lines).

For the SE termination, one low dropout regulator and 27 precise 110 Ohm resistors are used.




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