LM3881MM/NOPB

Product Overview

• Category: Integrated Circuit
• Use: Power Management
• Characteristics: Low-power voltage supervisor with manual reset input
• Package: 8-pin VSSOP
• Essence: Voltage Supervisor IC
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 1.6V to 5.5V
• Manual Reset Input Threshold Voltage: 0.2VCC to 0.9VCC
• Power-On Reset Timeout Period: 200ms (typical)
• Quiescent Current: 10µA (typical)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The LM3881MM/NOPB has the following pin configuration:

1. MR (Manual Reset): This pin is used to manually reset the device.
2. GND (Ground): Connect this pin to the ground of the circuit.
3. VCC (Supply Voltage): Connect this pin to the positive supply voltage.
4. RESET (Reset Output): This pin provides a reset signal when the monitored voltage drops below the threshold.
5. SENSE (Voltage Sense): Connect this pin to the voltage to be monitored.
6. NC (No Connection): This pin is not connected and should be left floating.
7. NC (No Connection): This pin is not connected and should be left floating.
8. NC (No Connection): This pin is not connected and should be left floating.

Functional Features

• Monitors the voltage level and provides a reset signal when it falls below a certain threshold.
• Manual reset input allows for external control of the reset function.
• Low quiescent current makes it suitable for battery-powered applications.
• Wide supply voltage range enables compatibility with various systems.
• Power-on reset timeout period ensures stable operation during power-up.

Advantages and Disadvantages

Advantages: - Provides reliable voltage monitoring and reset functionality. - Low-power consumption extends battery life in portable devices. - Small package size saves board space. - Wide supply voltage range enhances versatility.

Disadvantages: - Limited number of pins may restrict the device's functionality in complex systems. - Manual reset input requires external control, which may add complexity to the design.

Working Principles

The LM3881MM/NOPB is a voltage supervisor IC that continuously monitors the voltage level at the SENSE pin. When the monitored voltage drops below the threshold set by the internal reference, the RESET pin goes low, indicating a reset condition. The manual reset input (MR) allows for an external signal to assert a reset, overriding the internal voltage monitoring. The device operates with low quiescent current, making it suitable for power-sensitive applications.

Detailed Application Field Plans

The LM3881MM/NOPB can be used in various applications, including but not limited to:

1. Battery-Powered Devices: Provides voltage monitoring and reset functionality in portable electronics such as smartphones, tablets, and wearables.
2. Industrial Control Systems: Ensures reliable operation by monitoring critical voltages in industrial automation equipment.
3. Automotive Electronics: Protects sensitive components by providing reset signals when the supply voltage falls below the specified level.
4. Home Automation: Enables safe and reliable operation of smart home devices by monitoring power supply integrity.
5. Medical Equipment: Ensures patient safety by monitoring critical voltages in medical devices.

Detailed and Complete Alternative Models

Some alternative models to the LM3881MM/NOPB include:

1. MAX823: Voltage supervisor with manual reset input, available in various package options.
2. TPS3808: Precision voltage supervisor with adjustable reset timeout period.
3. ADM6315: Microprocessor supervisory circuit with manual reset input and watchdog timer.
4. LTC2910: Dual voltage supervisor with adjustable threshold levels and manual reset input.

These alternative models offer similar functionality and can be considered based on specific application requirements.

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