MAX809TEUR+TCEH

Product Overview

Category

MAX809TEUR+TCEH belongs to the category of voltage supervisors or reset ICs.

Use

This product is primarily used to monitor the power supply voltage in electronic systems and ensure proper system operation by generating a reset signal when the voltage falls below a specified threshold.

Characteristics

• Voltage monitoring: MAX809TEUR+TCEH can monitor voltages in the range of 1.2V to 5.0V.
• Low power consumption: It operates with very low quiescent current, making it suitable for battery-powered applications.
• Precision voltage threshold: The device has a fixed voltage threshold with tight accuracy, ensuring reliable voltage monitoring.
• Reset timeout period: It provides an adjustable reset timeout period to accommodate different system requirements.
• Active-low reset output: The reset signal generated by MAX809TEUR+TCEH is active-low, which is compatible with most microcontrollers and digital logic circuits.

Package and Quantity

MAX809TEUR+TCEH is available in a small SOT23-3 package. It is typically sold in reels containing 3000 units.

Specifications

• Supply Voltage Range: 1.2V to 5.5V
• Reset Threshold Accuracy: ±1.5%
• Quiescent Current: 3µA (typical)
• Reset Timeout Period: Adjustable from 1ms to 1600ms
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

MAX809TEUR+TCEH has three pins arranged as follows:

```

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| | --| RST | --| GND | --| VCC | |_______| ```

1. RST: Reset Output Pin
2. GND: Ground Pin
3. VCC: Power Supply Pin

Functional Features

• Voltage Monitoring: MAX809TEUR+TCEH continuously monitors the supply voltage.
• Reset Generation: When the voltage falls below the threshold, it generates an active-low reset signal.
• Adjustable Timeout: The reset timeout period can be adjusted to suit specific system requirements.
• Power-On Reset: It provides a power-on reset function to ensure proper system initialization during power-up.

Advantages and Disadvantages

Advantages

• Compact package size allows for space-efficient designs.
• Low quiescent current minimizes power consumption.
• Precise voltage threshold ensures accurate monitoring.
• Adjustable reset timeout accommodates various system needs.
• Power-on reset feature enhances system reliability during startup.

Disadvantages

• Fixed voltage threshold may not be suitable for all applications requiring different voltage levels.
• Limited number of pins restricts additional functionality integration.

Working Principles

MAX809TEUR+TCEH operates by comparing the supply voltage with a fixed threshold. When the voltage drops below this threshold, the internal circuitry triggers the generation of an active-low reset signal. This reset signal remains active until the voltage rises above the threshold or the reset timeout period elapses.

The device continuously monitors the voltage, ensuring that the system remains in a known state even during power fluctuations or brownout conditions.

Application Field Plans

MAX809TEUR+TCEH finds applications in various electronic systems where reliable voltage monitoring and reset generation are critical. Some potential application fields include:

1. Microcontroller-based Systems: Ensuring proper operation and system integrity during power supply variations.
2. Industrial Control Systems: Providing reliable reset signals to prevent data corruption or system malfunction.
3. Automotive Electronics: Monitoring voltage levels to protect sensitive components from damage.
4. Battery-Powered Devices: Extending battery life by efficiently managing power supply voltages.
5. Embedded Systems: Ensuring system stability and preventing software glitches caused by voltage fluctuations.

Alternative Models

There are several alternative models available in the market that offer similar functionality to MAX809TEUR+TCEH. Some notable alternatives include:

1. MAX811: Offers adjustable reset timeout period and additional features like manual reset input.
2. ADM708: Provides a wider supply voltage range and higher accuracy.
3. MCP101: Features a push-pull output configuration for driving external loads.
4. TPS3808: Offers programmable threshold voltage and adjustable reset timeout.

These alternative models can be considered based on specific application requirements and design constraints.

In conclusion, MAX809TEUR+TCEH is a voltage supervisor IC that provides reliable voltage monitoring and reset generation capabilities. With its compact size, low power consumption, and precise voltage threshold, it finds applications in various electronic systems requiring stable operation and protection against voltage fluctuations.