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參數(shù)資料
| 型號： | LM81 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Serial Interface ACPI-Compatible Microprocessor System |
| 中文描述： | 串行接口ACPI的兼容微處理器系統(tǒng) |
| 文件頁數(shù)： | 7/32頁 |
| 文件大小： | 412K |
| 代理商： | LM81 |
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AC Electrical Characteristics
The following specifications apply for +2.8V
DC
≤
V
+
≤
+3.8V
on SMBCLK and SMBData, unless otherwise specified.
Bold-
face limits apply for T
A
= T
J
= T
MIN
to T
MAX
;
all other limits T
A
= T
J
= 25C. (Note 15)
Symbol
Parameter
Conditions
Typical
(Note 9)
Limits
(Note 10)
Units
(Limits)
SERIAL BUS TIMING CHARACTERISTICS
t
1
SMBCLK (Clock) Period
t
rise
SMBCLK and SMBData Rise Time
t
fall
SMBCLK and SMBData Fall Time
t
2
Data In Setup Time to SMBCLK High
t
3
Data Out Stable After SMBCLK Low
t
4
SMBData Low Setup Time to SMBCLK Low
(start)
t
5
SMBData High Hold Time After SMBCLK
High (stop)
t
TIMEOUT
SMBData or SMBCLK low time required to
reset the Serial Bus Interface to the Idle
State
C
L
Capacitive Load on SMBCLK and SMBData
2.5
1
300
100
0
100
μs (min)
μs (max)
ns (max)
ns (min)
ns (min)
ns (min)
100
ns (min)
31
25
35
400
ms
ms (min)
ms (max)
pF (max)
DS100072-4
FIGURE 1. Serial Bus Timing Diagram
www.national.com
7
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