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