C.1.11.1 Host Adapter

The host adapter is a Symbios Logic PCI-SCSI I/O processor IC. The host adapter and all target devices comply with the Fast-20 single-ended drivers and receivers characteristics. The electrical characteristics of the output buffers include:

• Vol (output low) equals 0 to 0.5 VDC with Iol at 48 mA (signal asserted)

• Voh (out high) equals 2.5 to 3.7 VDC (signal negated)

• trise (rising slew rate) equals 520 mV per nanosecond maximum (0.7 to 2.3 VDC)

• tfall (falling slew rate) equals 520 mV per nanosecond maximum(2.3 to 0.7 VDC)

The Fast-20 electrical characteristics for the host adapter and target device include:

• Vil (input low) equals 1.0 VDC maximum (signal true)

• Vih (input high) equals 1.9 VDC minimum (signal false)

• Iil (input low current) equals +/- 20 mA at Vi equals 0.5 VDC

• Iih (input high current) equals +/- 20 mA at Vi equals 2.7 VDC

• Minimum input hysteresis equals 0.3 VDC