MAX801NEPA+ - English Editing Encyclopedia Entry

Product Overview

• Category: Integrated Circuit (IC)
• Use: Power Management
• Characteristics: Low-power voltage detector with manual reset, watchdog timer, and power-fail output
• Package: 8-pin PDIP (Plastic Dual In-Line Package)
• Essence: MAX801NEPA+ is a versatile IC that provides various functions related to power management in electronic devices.
• Packaging/Quantity: Available in tape and reel packaging, with a quantity of 250 units per reel.

Specifications

• Supply Voltage Range: 1.0V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Reset Threshold Voltage Options: 2.63V, 3.08V, 4.38V, and adjustable
• Watchdog Timeout Period: 1.6s, 3.2s, 6.4s, or adjustable
• Power-Fail Output Voltage: 1.25V

Pin Configuration

The MAX801NEPA+ has the following pin configuration:

1. GND: Ground
2. MR: Manual Reset Input
3. RESET: Active-Low Reset Output
4. VCC: Supply Voltage
5. WDI: Watchdog Timer Input
6. PF: Power-Fail Output
7. NC: No Connection
8. NC: No Connection

Functional Features

1. Voltage Detection: The MAX801NEPA+ monitors the supply voltage and generates a reset signal when it falls below a specified threshold.
2. Manual Reset: The MR pin allows for manual resetting of the device, overriding the automatic reset function.
3. Watchdog Timer: The WDI pin is used to feed the watchdog timer, which resets the device if it does not receive a periodic input within the specified timeout period.
4. Power-Fail Output: The PF pin provides a power-fail indication when the supply voltage drops below the power-fail threshold.

Advantages and Disadvantages

Advantages: - Versatile power management IC with multiple functions - Wide supply voltage range allows for compatibility with various systems - Adjustable reset threshold and watchdog timeout options provide flexibility - Power-fail output enables monitoring of supply voltage stability

Disadvantages: - Limited number of available pin configurations - Not suitable for applications requiring higher voltage thresholds

Working Principles

The MAX801NEPA+ operates by continuously monitoring the supply voltage using an internal voltage comparator. When the voltage falls below the set threshold, the reset output is activated, indicating a power failure. The watchdog timer ensures system integrity by resetting the device if it does not receive a periodic input within the specified timeout period. The manual reset feature allows for user intervention in case of system malfunction.

Application Field Plans

The MAX801NEPA+ finds applications in various electronic devices that require reliable power management. Some potential application fields include:

1. Battery-powered devices: Portable electronics, medical devices, and wireless sensors.
2. Industrial control systems: Programmable logic controllers (PLCs), motor control units, and power supplies.
3. Automotive electronics: Engine control units (ECUs), dashboard systems, and infotainment systems.
4. Home automation: Smart thermostats, security systems, and lighting controls.

Alternative Models

For users seeking alternative models with similar functionality, the following options are available:

1. MAX803NEUA+: 3-pin SOT23 package, adjustable reset threshold, and power-fail output.
2. MAX809SEUR+: 3-pin SOT23 package, fixed reset threshold options, and watchdog timer.
3. MAX811TEUS+: 4-pin µMAX package, adjustable reset threshold, and manual reset input.

These alternative models provide comparable features and can be considered based on specific application requirements.

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