ASC7512 ETC2 [List of Unclassifed Manufacturers], ASC7512 Datasheet - Page 6

• Manufacturer Part Number: ASC7512
• Description: DIGITAL TEMPERATURE SENSOR WITH INTEGRATED FAN CONTROL
• Manufacturer: ETC2 [List of Unclassifed Manufacturers]

Serial Port Timing
(T
© Andigilog, Inc. 2006
SCL Operating Frequency
SCL Clock Transition Time
SCL Clock Low Period
SCL Clock High Period
Bus free time between a Stop and a new Start Condition
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 aSC7512 must be operational after a power-on reset
A
= 25 °C, V
5. These specifications are guaranteed only for the test conditions listed.
6. The accuracy of the aSC7512 is guaranteed when using the thermal diode of a processor or any thermal diode with a non-ideality
7. Accuracy (expressed in °C) = Difference between the aSC7512 reported output temperature and the temperature being
8. Holding the SMBDAT and/or SMBCLK lines Low for a time interval greater than
of 1.008 and internal series resistance of 3.52Ω. When using a 2N3904 type transistor as a thermal diode the error band will be
typically shifted depending on transistor characteristics.
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 aSC7512 and the thermal resistance. See (Note 3) for the thermal resistance
to be used in the self-heating calculation.
machine, therefore setting the SMBDAT pin to a high impedance state.
DD
= 3.3V unless otherwise noted, Guaranteed by design, not production tested)
SCL
SDA
Parameter
Data Out
t
HD:STA
SDA
t
SCL
BUF
t
LOW
www.andigilog.com
t
SU:DAT
- 6 -
t
HIGH
t
T:LH
t
f
t
t
t
t
t
t
t
t
10
t
t
SU:STA
SCL
T:LH
LOW
HIGH
BUF
SU:DAT
HD:DAT
SU:STA
HD:STA
SU:STO
POR
Symbol
90
t
HD:DAT
, t
t
TIMEOUT
T:HL
90
10
t
T:HL
will reset the aSC7512’s SMBus state
100
300
600
600
600
Min
1.3
0.6
1.3
August 2006 - 70A05003
Typ
aSC7512
Max
400
300
500
50
t
SU:STO
Units
kHz
ms
ns
μs
μs
μs
ns
ns
ns
ns
ns