LM87CIMT National Semiconductor, LM87CIMT Datasheet - Page 26

• Manufacturer Part Number: LM87CIMT
• Description: Temperature Sensor IC
• Manufacturer: National Semiconductor

Specifications of LM87CIMT

• Peak Reflow Compatible (260 C): No
• Ic Function: Temperature Sensor IC
• Supply Voltage Max: 3.8V
• Leaded Process Compatible: No
• Mounting Type: Surface Mount
• Operating Temperature Range: -40°C To +125°C
• Temperature Sensor Function: Temp Sensor
• Interface Type: Serial (2-Wire)
• Output Type: Digital
• Package Type: TSSOP
• Operating Temperature (min): -40C
• Operating Temperature (max): 125C
• Operating Temperature Classification: Automotive
• Operating Supply Voltage (typ): 3.3V
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

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Bit
Bit
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
13.5 Configuration Register 1—Address 40h
Power on default – <7:0> = 00001000 binary
13.6 Interrupt Status Register 1—Address 41h
Power on default – <7:0> = 0000 0000 binary
Start
INT# Enable
THERM# Enable Read/Write A one enables the THERM# Interrupt output.
INT#_Clear
RESET#
Reserved
THERM#_Clear
INITIALIZATION
+2.5Vin
Vccp1
Vcc
+5Vin
Int. Temp.
Ext. Temp.
FAN1/AIN1
FAN2/AIN2
Name
Name
Read Only
Read Only
Read Only
Read Only
Read Only
Read Only
Read Only
Read Only
Read/Write
Read/Write A one enables startup of monitoring operations, a zero puts the part in standby mode.
Read/Write A one enables the INT# Interrupt output.
Read/Write A one disables the INT# output without affecting the contents of Interrupt Status Registers. The
Read/Write A one outputs a 20 ms minimum active low reset signal at RESET#. This bit is cleared once the
Read/Write
Read/Write A one disables the THERM# output without affecting the contents of Interrupt Status Registers.
Read/Write A one restores power on default values to the Configuration Register, Interrupt Status Registers,
Read/Write
A one indicates a High or Low limit has been exceeded.
A one indicates a High or Low limit has been exceeded.
A one indicates a High or Low limit has been exceeded.
A one indicates a High or Low limit has been exceeded.
A one indicates a High or Low limit has been exceeded.
A one indicates a High or Low limit has been exceeded.
A one indicates the fan count limit has been exceeded or an AIN1 High or Low limit has been
exceeded.
A one indicates the fan count limit has been exceeded or an AIN2 High or Low limit has been
exceeded.
Note: The outputs of Interrupt pins will not be cleared if the user writes a zero to this location after
an interrupt has occurred, unlike the “INT_Clear” bit.
At start up, limit checking functions and scanning begin. Note, all limits should be set in the Value
RAM before setting this bit HIGH.
device will stop monitoring. It will resume upon clearing of this bit.
pulse has gone inactive.
Interrupt Mask Registers, CI Clear Register, VID/Fan Divisor Register, VID4, Temperature
Configuration Register, and the Extended Mode Registers. This bit clears itself since the power
on default is zero.
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Description
Description