Avago Technologies LSI53C876E - Manual (Page 244)

6-12 Electrical Characteristics
6.4 AC Characteristics
The AC characteristics described in this section apply over the entire
range of operating conditions (refer to
Section 6.1, “DC Characteristics” ).
Chip timing is based on simulation at worst case voltage, temperature,
and processing.
This part of the chapter contains AC Characteristics for the PCI Interface
and the SCSI Interface.
Table 6.21 and Figure 6.6 provide Clock Timing
data.
Figure 6.6 Clock Timing
Table 6.21 Clock Timing
Symbol Parameter Min Max Unit
t
1
Bus clock cycle time 30 DC ns
SCSI clock cycle time (SCLK)
1
1. This parameter must be met to ensure SCSI timings are within specification.
15 60 ns
t
2
CLK LOW time
2
2. Duty cycle not to exceed 60/40.
11 – ns
SCLK LOW time
2
6 33 ns
t
3
CLK HIGH time
2
11 – ns
SCLK HIGH time
2
6 33 ns
t
4
CLK slew rate 1 – V/ns
SCLK slew rate 1 – ns
CLK, SCLK
t
1
t
3
t
4
t
2