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參數(shù)資料
| 型號： | ASC7621QS24 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | HARDWARE MONITOR WITH INTEGRATED FAN CONTROL |
| 中文描述： | 五金顯示器整合了風(fēng)扇控制 |
| 文件頁數(shù)： | 7/50頁 |
| 文件大小： | 565K |
| 代理商： | ASC7621QS24 |
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P
P
- 7 -
Andigilog, Inc. 2006
www.andigilog.com
October 2006 - 70A06010
aSC7621
Serial Port Timing
(T
A
= 25 °C, V
DD
= 3.3V unless otherwise noted, Guaranteed by design, not production tested)
Parameter
Symbol
Min
Typ
Max
Units
SCL Operating Frequency
SCL Clock Transition Time
SCL Clock Low Period
f
SCL
t
T:LH
, t
T:HL
t
LOW
t
HIGH
t
BUF
t
SU:DAT
t
HD:DAT
t
SU:STA
t
HD:STA
t
SU:STO
t
POR
t
TIMEOUT
400
300
kHz
ns
μ
s
μ
s
μ
s
ns
ns
ns
ns
ns
ms
ms
1.3
SCL Clock High Period
0.6
50
Bus free time between a Stop and a new Start Condition
1.3
Data in Set-Up to SCL High
Data Out Stable after SCL Low
SCL Low Set-up to SDA Low (Repeated Start Condition)
SCL High Hold after SDA Low (Start Condition)
SDA High after SCL High (Stop Condition)
Time in which aSC7621 must be operational after a power-on reset
SMBus Time-out before device communication interface reset
10
100
300
600
600
600
25
500
35
Notes (cont’d):
5. These specifications are guaranteed only for the test conditions listed.
6. The accuracy of the aSC7621 is guaranteed when using the thermal diode of Intel Pentium 4, 65nm processors or any thermal
diode with a non-ideality of 1.009 and series resistance of 4.52
. When using a 2N3904 type transistor or an CPU with a
different non-ideality the error band will be typically shifted depending on transistor diode or CPU characteristics. See
applications section for details.
7. Accuracy (expressed in °C) = Difference between the aSC7621 reported output temperature and the temperature being
measured. Local temperature accuracy does not include the effects of self-heating. The rise in temperature due to self-heating
is the product of the internal power dissipation of the aSC7621 and the thermal resistance. See (Note 3) for the thermal
resistance to be used in the self-heating calculation.
8. TUE, total unadjusted error, includes ADC gain, offset, linearity and reference errors. TUE is defined as the “actual
V
in
” to
achieve a given code transition minus the “theoretical
V
in
“ for the same code. Therefore, a positive error indicates that the input
voltage is greater than the theoretical input voltage for a given code. If the theoretical input voltage was applied to an aSC7621
that has positive error, the aSC7621’s reading would be less than the theoretical.
9. This specification is provided only to indicate how often temperature and voltage data is updated. The aSC7621 can be read at
any time without regard to conversion state (and will yield last conversion result).
10. Holding the SMBCLK line low for a time interval greater than t
TIMEOUT
will reset the aSC7621’s SMBus state machine, therefore
setting the SMBDAT pin to a high impedance state.
t
HD:STA
t
SU:STO
t
SU:DAT
SCL
SDA
t
BUF
t
SU:STA
t
HD:DAT
SCL
SDA
Data Out
10
10
90
t
T:LH
t
T:HL
t
LOW
t
HIGH
90
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