DS2108

Differential SCSI Switchable Terminator


Please check latest availability status for a specific part variant.

Description

The DS2108 integrates 18 330-ohm and nine 150-ohm precisely switched resistors for terminating nine high-voltage differential (HVC) SCSI pairs of lines and includes a power-down feature. The power-down can be switched via software, which is simpler than opening the box to switch it manually. The 24-pin SOIC saves board space for space-critical applications.

SCSI termination is used wherever data must be transmitted without voltage drops caused by signal reflection at the parallel bus termination point, which is often significant in multidropped systems.

All Dallas terminators feature power-down mode with extremely low-quiescent consumption. Different SCSI terminators are available to match every existing SCSI protocol and to address different design concerns, such as price, board space, and voltage differential.

Key Features

  • Fully compliant with SCSI-1, -2, and -3 and EIA RS-485
  • Differential termination for nine pairs of signal lines
  • Laser-trimmed 330- and 150-ohm resistors with ±5% tolerance over full temperature range
  • Switchable power-down with low 6pF capacitance
  • Operating ranges:
    • -7V to +12V
    • 0°C to +70°C
Product Reliability Reports: DS2108.pdf 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

Quality Management System >
Environmental Management System >

 
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