LM81CIMTX-3 National Semiconductor, LM81CIMTX-3 Datasheet - Page 32

• Manufacturer Part Number: LM81CIMTX-3
• Manufacturer: National Semiconductor

Specifications of LM81CIMTX-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

Typical Application
DS100072-23
FIGURE 19. In this PC application the LM81 monitors temperature, fan speed for 2 fans, and 6 power
supply voltages. It also monitors an optical chassis intrusion detector.
The LM81 provides a DAC output that can be used to control fan speed.
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