MAX6642ATT98-T Maxim Integrated Products, MAX6642ATT98-T Datasheet - Page 8

• Manufacturer Part Number: MAX6642ATT98-T
• Description: Board Mount Temperature Sensors
• Manufacturer: Maxim Integrated Products

Specifications of MAX6642ATT98-T

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

±1°C, SMBus-Compatible Remote/Local
Temperature Sensor with Overtemperature Alarm
Table 3. Command-Byte Assignments
Table 4. Configuration-Byte Bit Assignments
Table 5. Status-Byte Bit Assignments
8
A D D R ESS
7 (MSB)
7 (MSB)
0Bh
0D h
00h
01h
02h
03h
05h
07h
09h
0Fh
10h
11h
FE h
_______________________________________________________________________________________
1 to 0
3 to 0
BIT
BIT
6
5
4
3
2
6
5
4
00h ( 0000 0000)
00h ( 0000 0000)
N /A
10h ( 0001 0000)
46h ( 0100 0110) + 70° C
78h ( 0111 1000) + 120° C Read r em ote hi g h l i m i t
N /A
N /A
N /A
N /A
0000 0000
0000 0000
4D h ( 0100 1101)
External only
PO R ST A T E
STOP/RUN
MASK1
RHIGH
LHIGH
NAME
NAME
OPEN
queue
BUSY
Fault
—
—
—
—
Read l ocal tem p er atur e
Read r em ote tem p er atur e
Read status b yte
Read confi g ur ati on b yte
Read l ocal hi g h l i m i t
W r i te confi g ur ati on b yte
W r i te l ocal hi g h l i m i t
W r i te r em ote hi g h l i m i t
S i ng l e shot
Read r em ote extend ed
tem p er atur e
Read i nter nal extend ed
tem p er atur e
Read m anufactur er ID
F U N C T IO N
POR STATE
POR STATE
0000
0
0
0
0
0
0
0
0
0
0
1
the ALERT is cleared by responding to the alert
response address and the temperature fault condition
still exists, ALERT is reasserted after the next tempera-
ture-monitoring cycle. To clear ALERT while the tempera-
ture is above the trip threshold, write a new high limit that
is higher than the current temperature. The ALERT out-
put is open drain, allowing multiple devices to share a
common interrupt line.
The SMBus alert response interrupt pointer provides
quick fault identification for simple slave devices like
temperature sensors. Upon receiving an ALERT inter-
rupt signal, the host master can broadcast a Receive
Byte transmission to the alert response slave address
(0001 100). Following such a broadcast, any slave
device that generated an interrupt attempts to identify
itself by putting its own address on the bus.
The alert response can activate several different slave
devices simultaneously, similar to the I
If more than one slave attempts to respond, bus arbitra-
A 1 indicates the MAX6642 is busy converting.
A 1 indicates an internal high-temperature fault. Clear
LHIGH with a POR or by reading the status byte.
Reserved.
A 1 indicates an external high-temperature fault. Clear
RHIGH with a POR or by reading the status byte.
Reserved.
A 1 indicates a diode open condition. Clear OPEN with a
POR or by reading the status byte when the condition no
longer exists.
Reserved.
A 1 masks off (disables) the ALERT interrupts.
A 1 puts the MAX6642 into standby mode.
A 1 disables local temperature measurements so that only
remote temperature is measured. The measurement rate
becomes 8Hz.
0: ALERT is set by a single fault. 1: Two consecutive faults
are required to set ALERT.
Reserved.
FUNCTION
FUNCTION
Alert Response Address
2
C General Call.