EMC1001-1-AFZQ-TR SMSC, EMC1001-1-AFZQ-TR Datasheet - Page 11

• Manufacturer Part Number: EMC1001-1-AFZQ-TR
• Description: Board Mount Temperature Sensors SMBus Temp Snsr
• Manufacturer: SMSC

Specifications of EMC1001-1-AFZQ-TR

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

1.5°C SMBus Temperature Sensor in Miniature SOT-23
Datasheet
SMSC EMC1001
4.3
4.4
B15
b9
B14
b8
Temperature High Limit
Temperature Low Limit
“B” shows the bit position of a 16-bit word created by concatenating the High Byte and Low Byte, and
the lower case “b” shows the bit position in the 10-bit value.
The
high limit). The
ALERT
As described in the SMBus specification, an SMBus slave may inform the SMBus master that it wants
to talk by asserting the SMBALERT# signal. One or more
as a wired-or bus to a common input.
The
100) sent by the host, and if the out of limit condition no longer exists, but it does not reset if the error
condition remains. The
out of limit temperature measurement, except when it is configured as a second
The
measurement exceeds the Temperature High Limit value. In this mode, the output will not de-assert
until the temerature drops below the Temperature High Limit minus the THERM Hysteresis value.
The
limit. It can be used to drive a fan or other failsafe devices. The
requires a pull up resistor to V
Table 1.2 on page
When the
THERM limit minus the THERM hysteresis value.
ALERT/THERM2 Output
ADDR/THERM Output
B13
b7
ALERT
ALERT
ADDR
ALERT
/
Temp
THERM2
B12
b6
HIGH BYTE
/
/
Figure 4.3 ALERT Response to Temperature Limits Exceeded
THERM
/
/
ADDR
THERM2
THERM2
THERM2
B11
b5
pin can be used as an SMBALERT#, or may be configured as a second
ALERT
/
THERM
output asserts if the temperature measurement exceeds the programmable THERM
3. The
pin resets when the EMC1001 responds to an alert response address (ARA=0001
pin can be configured as a second
output asserts if an out of limit measurement is detected (TA ≤ low limit or TA >
Table 4.2 Bit Position of Two Byte Values
B10
b4
/
THERM2
ALERT
pin is asserted, it will not de-assert until the temperature drops below the
ADDR
B9
b3
DD
/
THERM2
pin is an open drain output and requires a pull up resistor to V
/
. The value of this pull up resistor determines the slave address per
THERM
SMBus ARA
DATASHEET
B8
b2
pin can be masked so that it will not assert in the event of an
pin cannot be masked.
11
B7
b1
B6
b0
THERM
B5
0
ALERT
pin that asserts when the temperature
B4
0
ADDR
LOW BYTE
outputs can be hardwired together
Time
ALERT/THERM2
/
THERM
Logic High
B3
0
Logic
Level
pin is open drain and
B2
0
Revision 1.6 (01-29-07)
THERM
THERM
B1
0
pin.
output.
DD
B0
0
.The