參數(shù)資料
型號(hào)： LM82CIMQAX
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類(lèi)： 溫度/濕度傳感器
英文描述： Remote Diode and Local Digital Temperature Sensor with Two-Wire Interface
中文描述： DIGITAL TEMP SENSOR-SERIAL, 8BIT(s), 4Cel, RECTANGULAR, SURFACE MOUNT
封裝： QSOP-16
文件頁(yè)數(shù)： 6/17頁(yè)
文件大小： 341K
代理商： LM82CIMQAX
Logic Electrical Characteristics
(Continued)
SMBus DIGITAL SWITCHING CHARACTERISTICS
Unless otherwise noted, these specifications apply for V
CC
=+3.0 Vdc to +3.6 Vdc, C
(load capacitance) on output lines = 80
pF.
Boldface limits apply for T
= T
= T
to T
;
= T
= +25C, unless otherwise noted.
The switching characteristics of the LM82 fully meet or exceed the published specifications of the SMBus or I
2
C bus. The fol-
lowing parameters are the timing relationships between SMBCLK and SMBData signals related to the LM82. They are not the
I
2
C or SMBus bus specifications.
Symbol
Parameter
Conditions
Typical
(Note 6)
Limits
(Note 7)
100
10
1.3
25
10
0.6
Units
(Limit)
kHz (max)
kHz (min)
μs (min)
ms (max)
ms (max)
μs (min)
μs (max)
ns (max)
ns (max)
f
SMB
SMBus Clock Frequency
t
LOW
SMBus Clock Low Time
10 % to 10 %
t
LOW
MEXT Cumulative Clock Low Extend Time
t
HIGH
SMBus Clock High Time
t
R,SMB
SMBus Rise Time
t
F,SMB
SMBus Fall Time
t
OF
Output Fall Time
90 % to 90%
10% to 90%
90% to 10%
C
L
= 400 pF,
I
O
= 3 mA
1
0.3
250
t
TIMEOUT
SMBData and SMBCLK Time Low for
Reset of Serial Interface (Note 12)
SMBCLK (Clock) Period
Data In Setup Time to SMBCLK High
25
40
10
100
ms (min)
ms (max)
μs (min)
ns (min)
t
1
t
2
,
t
SU;DAT
t
3
,
t
HD;DAT
t
4
,
t
HD;STA
t
5
,
t
SU;STO
t
6
,
t
SU;STA
t
BUF
Data Out Stable after SMBCLK Low
300
TBD
100
ns (min)
ns (max)
ns (min)
SMBData Low Setup Time to SMBCLK
Low
SMBData High Delay Time after
SMBCLK High (Stop Condition Setup)
SMBus Start-Condition Setup Time
100
ns (min)
0.6
μs (min)
SMBus Free Time
1.3
μs (min)
SMBus Communication
DS101297-4
L
www.national.com
6
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