LM80CIMT-5/NOPB National Semiconductor, LM80CIMT-5/NOPB Datasheet - Page 10

• Manufacturer Part Number: LM80CIMT-5/NOPB
• Description: IC MONITOR SYS HARDWAR 24-TSSOP
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LM80CIMT-5/NOPB

• Function: Hardware Monitor
• Topology: ADC, Comparator, Fan Speed Counter, Register Bank
• Sensor Type: External & Internal
• Sensing Temperature: -25°C ~ 125°C, External Sensor
• Output Type: I²C™
• Output Alarm: No
• Output Fan: No
• Voltage - Supply: 2.8 V ~ 5.75 V
• Operating Temperature: -25°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 24-TSSOP
• Manual Reset: Not Resettable
• Watchdog: Watchdog
• Battery Backup Switching: No
• Supply Voltage (max): 5.75 V
• Supply Voltage (min): 2.8 V
• Supply Current (typ): 200 uA (Typ)
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 25 C
• Power Fail Detection: No
• Ic Output Type: Digital
• Sensing Accuracy Range: ± 3°C
• Supply Current: 200µA
• Supply Voltage Range: 2.8V To 5.75V
• Sensor Case Style: TSSOP
• No. Of Pins: 24
• Filter Terminals: Solder
• Rohs Compliant: Yes
• Accuracy %: 3°C
• For Use With: LM80EVAL - EVALUATION BOARD FOR LM80
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: *LM80CIMT-5; *LM80CIMT-5/NOPB; LM80CIMT-5

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2.1 Internal Registers of the LM80
2.2 Serial Bus Interface
Configuration Register
Interrupt Status Register 1
Interrupt Status Register 2
Interrupt Mask Register 1
Interrupt Mask Register 2
Fan Divisor/RST_OUT/OS
Register
OS/ Configuration and
Temperature Resolution
Register
Value RAM
Register
TABLE 1. The internal registers and their corresponding internal LM80 address is as follows:
(a) Serial Bus Write to the Internal Address Register followed by the Data Byte
data to be written to the
(b) Serial Bus Write to the Internal Address Register Only
Address (This is the
Address Register)
LM80 Internal Hex
20h-3Fh
00h
01h
02h
03h
04h
05h
06h
0000 1000
0000 0000
0000 0000
0000 0000
0000 0000
0001 0100
0000 0001
Power on
10
Value
FAN1 and FAN2 divisor = 2 (count of 153 = 4400
RPM)
Notes
10004008
10004009