Overview
The LM81BIMTX-3/NOPB is a highly integrated data acquisition system designed by Texas Instruments for hardware monitoring in various microprocessor-based systems, including servers and personal computers. This component is part of the LM81 series and is known for its comprehensive monitoring capabilities, including temperature, fan speed, and power supply voltages. It features an SMBus-compatible serial interface and is packaged in a 24-pin TSSOP (Thin Shrink Small Outline Package) configuration.
Key Specifications
| Parameter | Value |
|---|---|
| Package Type | 24-TSSOP (PW) |
| Operating Temperature Range | -40°C to 125°C |
| Supply Voltage Range | 2.8V to 3.8V |
| Supply Current | 0.4 mA (typ), 0.9 mA (max) |
| ADC Resolution | 8 bits |
| DAC Resolution | 8 bits |
| Temperature Sensor Accuracy | ±3°C (max) |
| Temperature Sensor Resolution | 0.0625°C |
| Fan Speed Measurement Accuracy | 10% |
| Interface | SMBus 1.1 |
| Interrupt Outputs | 2 Count (INT and T_CRIT_) |
| VID Inputs | 5 (VID0-VID4) |
| GPIOs | 5 (VID, Chassis Intrusion, 2 TACH, DAC OUT, INT, TCRIT, RESET) |
Key Features
- Temperature Sensing: On-chip digital output temperature sensor with 9-bit or 12-bit resolution.
- Voltage Monitoring: 6 positive voltage inputs to monitor power supplies directly (e.g., +5V, +12V, +3.3V, +2.5V, Vccp).
- Fan Control and Monitoring: 8-bit DAC output for controlling fan speed and two fan speed monitoring inputs.
- Chassis Intrusion Detection: Input for chassis intrusion detection circuits.
- WATCHDOG Functionality: Programmable WATCHDOG limits with a fully programmable and maskable interrupt system.
- SMBus Compatibility: Serial Bus interface compatible with SMBus 1.1.
- VID Monitoring: Inputs for monitoring VID0-VID4).
Applications
The LM81BIMTX-3/NOPB is designed for use in various microprocessor-based systems, including:
- Servers
- Personal Computers
- Other microprocessor-based systems requiring hardware monitoring
It is particularly useful for monitoring power supply voltages, temperatures, and fan speeds, making it an essential component in maintaining system reliability and performance).
Q & A
- What is the operating temperature range of the LM81BIMTX-3/NOPB?
The operating temperature range is -40°C to 125°C.
- What is the supply voltage range for the LM81BIMTX-3/NOPB?
The supply voltage range is 2.8V to 3.8V.
- What type of interface does the LM81BIMTX-3/NOPB use?
The LM81BIMTX-3/NOPB uses an SMBus 1.1 serial interface.
- How many fan speed monitoring inputs does the LM81BIMTX-3/NOPB have?
The LM81BIMTX-3/NOPB has two fan speed monitoring inputs.
- What is the resolution of the temperature sensor in the LM81BIMTX-3/NOPB?
The temperature sensor has a resolution of 0.0625°C.
- Does the LM81BIMTX-3/NOPB support chassis intrusion detection?
Yes, it has an input for chassis intrusion detection circuits.
- How many VID monitoring inputs does the LM81BIMTX-3/NOPB have?
The LM81BIMTX-3/NOPB has five VID monitoring inputs (VID0-VID4).
- What is the typical supply current of the LM81BIMTX-3/NOPB?
The typical supply current is 0.4 mA.
- Is the LM81BIMTX-3/NOPB RoHS compliant?
Yes, the LM81BIMTX-3/NOPB is RoHS compliant.
- What is the package type of the LM81BIMTX-3/NOPB?
The package type is 24-TSSOP (Thin Shrink Small Outline Package).
