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參數(shù)資料
| 型號(hào)： | STP2024PQFP |
| 元件分類(lèi)： | 參考電壓二極管 |
| 英文描述： | Low Current Operation at 250 ，Low Reverse Leakage,Low Noise Zener Diode |
| 中文描述： | 250 的低電流運(yùn)算，低反向泄露，低噪聲穩(wěn)壓二極管 |
| 文件頁(yè)數(shù)： | 11/20頁(yè) |
| 文件大?。?/td> | 221K |
| 代理商： | STP2024PQFP |
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11
32-bit SBus Master I/O Controller
Master I/O
STP2000QFP
July 1997
AC Characteristics: SCSI TIming
Signal #
Parameter
Conditions
Min
Max
Units
24
Clock period (t
CP
)
Synchronization latency
25
83.3
ns
25
t
CL
t
CL
+ t
CP
ns
With FASTCLK bit reset
26
Clock frequency, asynchronous
[1]
Clock frequency, synchronous
[1]
12
25
MHz
27
20
25
MHz
28
Clock high
14.58
0.65 x t
CP
0.65 x t
CP
ns
29
Clock low (t
CL
)
14.58
ns
With FASTCLK bit set
26
Clock frequency, asynchronous
[1]
Clock frequency, synchronous
[1]
20
40
MHz
27
38
40
MHz
28
Clock high
0.40 x t
CP
0.40 x t
CP
0.60 x t
CP
0.60 x t
CP
ns
29
Clock low (t
CL
)
ns
Asynchronous SCSI
30
Data setup to SCSI_ACK/SCSI_REQ low
60
–
ns
31
Data hold from SCSI_REQ high/SCSI_ACK low
FIFO is not empty
5
–
ns
32
SCSI_ACK low to SCSI_REQ high
–
50
ns
33
SCSI_ACK high to SCSI_REQ low
(data already setup)
FIFO is not full.
–
45
ns
34
SCSI_REQ high to SCSI_ACK high
–
50
ns
35
SCSI_REQ low to SCSI_ACK low
FIFO is not full.
–
50
ns
36
Data setup to SCSI_REQ/SCSI_ACK low
0
–
ns
37
Data hold from SCSI_REQ/SCSI_ACK low
–
18
ns
Synchronous SCSI - Normal SCSI
38
Data setup to SCSI_REQ/SCSI_ACK low
55
–
ns
39
Data hold from SCSI_REQ/SCSI_ACK low
100
–
ns
40
SCSI_REQ/SCSI_ACK assertion period
90
–
ns
41
SCSI_REQ/SCSI_ACK negation period
90
–
ns
Synchronous SCSI - Fast SCSI
38
Data setup to SCSI_REQ/SCSI_ACK low
25
–
ns
39
Data hold from SCSI_REQ/SCSI_ACK low
35
–
ns
40
SCSI_REQ/SCSI_ACK assertion period
30
–
ns
41
SCSI_REQ/SCSI_ACK negation period
30
–
ns
This Material Copyrighted by Its Respective Manufacturer
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|---|---|
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