LM81BIMT-3/NOPB

Thermal Management Overview

The LM81BIMT-3/NOPB is a serial interface ACPI-compatible microprocessor system hardware monitor manufactured by Texas Instruments. It operates within a supply voltage range of 2.8 V to 3.8 V and features threshold voltages of 2.5 V, 3.3 V, 5 V, and 12 V. The device provides active high, active low, and open drain outputs. It includes a watchdog timer and functions as a voltage supervisory circuit. The component is housed in a 24-TSSOP package and supports surface mount installation. It operates between -40°C and +125°C with a typical operating current of 400 µA.

Thermal Management Feature Summary

• Serial interface communication for ACPI-compatible microprocessor system monitoring
• Integrated watchdog timer functionality for system reliability
• Multiple output types including active high, active low, and open drain configurations

Thermal Management Applications

• Microprocessor system hardware monitoring
• ACPI-compatible system supervision
• Voltage threshold detection in electronic circuits

Thermal Management Procurement Notes

Verify the specific suffix designation carefully, as the LM81BIMT-3/NOPB may represent a variant distinct from the base LM81BIMT-3 model found in public records. Confirm RoHS compliance status directly with the manufacturer or authorized distributors, as existing listings indicate potential non-compliance for similar variants. Ensure the source document explicitly confirms the NOPB suffix does not alter the electrical characteristics or pinout compared to the standard version.

Thermal Management Selection Notes

Select this component when an ACPI-compatible serial interface is required for system monitoring rather than parallel interfaces. Consider the 24-TSSOP package size for board space constraints. Verify that the 2.8 V to 3.8 V supply range aligns with the target system's power rails. The inclusion of a watchdog timer makes it suitable for applications requiring automated recovery from software hangs without external components.

Thermal Management Part Context

This part belongs to the LM81 series of hardware monitors produced by Texas Instruments, which originated from National Semiconductor. The series is designed for comprehensive system management in computing environments. The LM81 family typically integrates multiple monitoring functions into a single serial-accessible device, reducing component count in complex motherboard designs.

Thermal Management Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Users should consult official Texas Instruments replacement guides for cross-referencing compatible devices.