LM81CIMT-3 National Semiconductor, LM81CIMT-3 Datasheet - Page 27

• Manufacturer Part Number: LM81CIMT-3
• Manufacturer: National Semiconductor

Specifications of LM81CIMT-3

• Monitored Voltage 1 (typ): 2.5/3.3/5/12V
• Battery Backup Switching: No
• Watchdog Timer: Yes
• Chip Enable Signals: No
• Manual Reset: No
• Package Type: TSSOP
• Operating Supply Voltage (min): 2.8V
• Operating Supply Voltage (max): 3.8V
• Operating Temp Range: -40C to 125C
• Operating Temperature Classification: Automotive
• Power Fail Detection: No
• Mounting: Surface Mount
• Pin Count: 24
• Lead Free Status / Rohs Status: Not Compliant

Bit
Bit
Bit
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
Functional Description
13.4 Interrupt Status Register 1 — Address 41h
Power on default –
13.5 Interrupt Status Register 2 — Address 42h
Power on default –
13.6 Interrupt Mask Register 1 — Address 43h
Power on default –
+12Vin
Vccp2
Reserved
Reserved
CI
Reserved
Reserved
TLOW
+2.5Vin
Vccp1
+3.3Vin
+5Vin
Temperature
Reserved
FAN1
FAN2
+2.5Vin
Vccp1
+3.3Vin
+5Vin
Temperature
Reserved
FAN1
FAN2
Name
Name
Name
<
<
<
Read Only
Read Only
Read Only
Read Only
Read Only
Read Only
Read Only
Read Only
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
7:0
7:0
7:0
Read/
Write
>
>
>
Read Only
Read Only
Read Only
Read Only
Read Only
Read Only
Read Only
Read Only
= 0000 0000 binary
= 0000 0000 binary
Read/Write
= 0000 0000 binary
A one disables the corresponding interrupt status bit for INT interrupt.
A one disables the corresponding interrupt status bit for INT interrupt.
A one disables the corresponding interrupt status bit for INT interrupt.
A one disables the corresponding interrupt status bit for INT interrupt.
A one disables the corresponding interrupt status bit for INT interrupt.
A one disables the corresponding interrupt status bit for INT interrupt.
A one disables the corresponding interrupt status bit for INT interrupt.
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 HIHYST temperature error, see SECTION 8.2 .
A one indicates the fan count limit has been exceeded.
A one indicates the fan count limit has been exceeded.
(Continued)
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 CI (Chassis Intrusion) has gone high.
A one indicates LOW temperature error in EXTENDED MODE ONLY, see
SECTION 8.2 .
27
Description
Description
Description
www.national.com