参数资料
型号: SYM53C180I2
厂商: LSI CORP
元件分类: 总线控制器
英文描述: SCSI BUS CONTROLLER, PBGA192
封装: 23 X 23 MM, 1.27 MM PITCH, PLASTIC, BGA-192
文件页数: 46/78页
文件大小: 1073K
代理商: SYM53C180I2
3-16
Specications
3.2.3 AC Characteristics
The AC characteristics described in this section apply over the entire
range of operating conditions (refer to DC Characteristics in this chapter).
Chip timing is based on simulation at worst case voltage, temperature,
and processing. The SYM53C180 requires a 40 MHz clock input.
Figure 3.12 Clock Timing
3.2.4 SCSI Interface Timing
Table 3.16
Clock Timing
Symbol
Parameter
Min
Max
Units
t1
Clock period
24.75
25.25
ns
t2
Clock low time
10
15
ns
t3
Clock high time
10
15
ns
t4
Clock rise time
1
V/ns
Clock
t1
t3
t4
t2
Table 3.17
Input Timing - Single Transition
Symbol
Parameter
Min
Max
Units
tST1
Input data setup
4.5
ns
tST2
Input data hold
4.5
ns
tST3
Input REQ/ACK assertion pulse width
6.5
ns
tST4
Input REQ/ACK deassertion pulse width
6.5
ns
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