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参数资料
| 型号： | MAX6642ATT94+T |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 温度/湿度传感器 |
| 英文描述： | ±1°C, SMBus-Compatible Remote/Local Temperature Sensor with Overtemperature Alarm |
| 中文描述： | DIGITAL TEMP SENSOR-SERIAL, 10BIT(s), 1Cel, SQUARE, SURFACE MOUNT |
| 封装： | 3 X 3 MM, 0.80 MM HEIGHT, MO-229WEEA, TDFN-6 |
| 文件页数： | 13/14页 |
| 文件大小： | 213K |
| 代理商： | MAX6642ATT94+T |
MAX6642
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.
Alert Response Address
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 I2C General Call.
If more than one slave attempts to respond, bus arbitra-
±1°C, SMBus-Compatible Remote/Local
Temperature Sensor with Overtemperature Alarm
8
_______________________________________________________________________________________
ADDRESS
POR STATEFUNCTION
00h
00h (0000 0000)
Read local temperature
01h
00h (0000 0000)
Read remote temperature
02h
N/A
Read status byte
03h
10h (0001 0000)
Read configuration byte
05h
46h (0100 0110) +70
°C
Read local high limit
07h
78h (0111 1000) +120
°C Read remote high limit
09h
N/A
Write configuration byte
0Bh
N/A
Write local high limit
0DhN/A
Write remote high limit
0Fh
N/A
Single shot
10h
0000 0000
Read remote extended
temperature
11h
0000 0000
Read internal extended
temperature
FEh4Dh (0100 1101)
Read manufacturer ID
Table 3. Command-Byte Assignments
BIT
NAME
POR STATE
FUNCTION
7 (MSB)
MASK1
0
A 1 masks off (disables) the
ALERT interrupts.
6
STOP/RUN
0
A 1 puts the MAX6642 into standby mode.
5
External only
0
A 1 disables local temperature measurements so that only
remote temperature is measured. The measurement rate
becomes 8Hz.
4
Fault
queue
1
0:
ALERT is set by a single fault. 1: Two consecutive faults
are required to set
ALERT.
3 to 0
—
0000
Reserved.
Table 4. Configuration-Byte Bit Assignments
BIT
NAME
POR STATE
FUNCTION
7 (MSB)
BUSY
0
A 1 indicates the MAX6642 is busy converting.
6
LHIGH
0
A 1 indicates an internal high-temperature fault. Clear
LHIGH with a POR or by reading the status byte.
5
—
0
Reserved.
4
RHIGH
0
A 1 indicates an external high-temperature fault. Clear
RHIGH with a POR or by reading the status byte.
3
—
0
Reserved.
2
OPEN
0
A 1 indicates a diode open condition. Clear OPEN with a
POR or by reading the status byte when the condition no
longer exists.
1 to 0
—
0
Reserved.
Table 5. Status-Byte Bit Assignments
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