LSI LSI53C1000, Техническое руководство

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AC Characteristics 6-11
6.3 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. Timing was developed with a load capacitance of 50 pF.
Table 6.14 and Figure 6.8 provide external clock timing data.
Figure 6.8 External Clock
Table 6.14 External Clock
Symbol Parameter
66 MHz PCI 33 MHz PCI
1
Units Min Max Min Max
t
1
PCI Bus clock period 15 30 30 250 ns
SCSI clock period 25 25 25 25 ns
t
2
PCI CLK LOW time
2
6 – 11 – ns
SCLK LOW time 10 15 10 15 ns
t
3
PCI CLK HIGH time 6 – 11 – ns
SCLK HIGH time 10 15 10 15 ns
t
4
PCI CLK slew rate 1.5 4 1 4 V/ns
1. The minimum PCI Clock frequency is 33 MHz.
2. Duty cycle not to exceed 60/40.
CLK, SCLK 1.4 V
t
1
t
3
t
4
t
2