MAX811SEUS+T

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Monitor and Reset Generator
• Characteristics: Low-power, precision voltage monitoring, manual reset input, watchdog timer, small package size
• Package: SOT-143
• Essence: The MAX811SEUS+T is a voltage monitor and reset generator IC that provides reliable power supply monitoring for microcontrollers, microprocessors, and other digital systems.
• Packaging/Quantity: Available in tape and reel packaging with 3000 units per reel.

Specifications

• Supply Voltage Range: 1.2V to 5.5V
• Threshold Voltage Options: 2.93V, 3.08V, 3.63V, 4.38V
• Reset Timeout Period: Adjustable from 1.6ms to 6.4s
• Operating Temperature Range: -40°C to +85°C
• Quiescent Current: 7µA (typical)

Pin Configuration

The MAX811SEUS+T features a 4-pin SOT-143 package with the following pin configuration:

1. GND: Ground connection
2. MR: Manual reset input
3. RESET: Active-low reset output
4. VCC: Supply voltage input

Functional Features

• Voltage Monitoring: Monitors the supply voltage and asserts the reset signal when it falls below the threshold voltage.
• Manual Reset Input: Allows an external push-button or switch to manually assert the reset signal.
• Watchdog Timer: Provides a mechanism to detect software or hardware failures by periodically resetting the system if a specific event does not occur within a set time period.
• Precision Monitoring: Accurate voltage monitoring with low voltage thresholds ensures reliable operation of the target system.

Advantages and Disadvantages

Advantages: - Low-power consumption - Small package size for space-constrained applications - Adjustable reset timeout period for flexibility - Reliable voltage monitoring for system stability

Disadvantages: - Limited threshold voltage options - Lack of additional features compared to more advanced voltage monitor ICs

Working Principles

The MAX811SEUS+T operates by continuously monitoring the supply voltage. When the voltage falls below the programmed threshold, the reset output is asserted, indicating a power failure or low voltage condition. The reset signal remains active until the voltage rises above the threshold and the reset timeout period elapses.

The manual reset input allows an external push-button or switch to assert the reset signal, providing a means for manual system reset. The watchdog timer feature ensures system integrity by periodically resetting the system if a specific event does not occur within the set time period.

Application Field Plans

The MAX811SEUS+T finds application in various fields where reliable voltage monitoring and reset generation are crucial. Some potential application areas include:

1. Embedded Systems: Used in microcontroller-based systems to ensure proper operation and prevent data corruption during power fluctuations.
2. Industrial Automation: Provides voltage monitoring and reset functionality in industrial control systems to maintain system reliability.
3. Automotive Electronics: Ensures stable operation of automotive electronic systems by monitoring the supply voltage and generating resets when necessary.
4. Medical Devices: Used in medical equipment to ensure uninterrupted operation and prevent data loss during power disruptions.

Alternative Models

For users seeking alternative options, the following voltage monitor and reset generator ICs can be considered:

1. MAX809SEUR+: Similar functionality with adjustable reset timeout period and different threshold voltage options.
2. MAX813LESA+: Offers additional features such as power-fail detection and battery backup switching.
3. MAX812REUS+: Provides a higher number of threshold voltage options for more precise voltage monitoring.

These alternative models offer different features and specifications to cater to specific application requirements.