MAX16049ETN+T

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Monitor and Reset Circuit
• Characteristics: Low-power, precision voltage monitoring, programmable threshold, manual reset input, watchdog timer, small package size
• Package: 6-pin SOT23
• Essence: Provides accurate voltage monitoring and reset functionality for electronic systems
• Packaging/Quantity: Tape and reel, 3000 units per reel

Specifications

• Supply Voltage Range: 1.6V to 5.5V
• Threshold Voltage Options: Programmable from 1.2V to 4.625V in 100mV steps
• Reset Timeout Period: Programmable from 1ms to 640ms in 20ms steps
• Manual Reset Input: Active-low input for external reset control
• Watchdog Timer: Monitors system activity and generates a reset if necessary
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The MAX16049ETN+T has the following pin configuration:

```

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| | --|1 |-- VCC --|2 |-- GND --|3 |-- MR (Manual Reset) --|4 |-- WDI (Watchdog Input) --|5 |-- RESET --|____| ```

Functional Features

• Accurate voltage monitoring: The MAX16049ETN+T can monitor the supply voltage and assert a reset signal when it falls below a programmable threshold.
• Programmable threshold: The threshold voltage can be set using external resistors, allowing flexibility in monitoring different voltage levels.
• Manual reset input: The active-low MR pin allows for an external reset control, enabling manual system resets.
• Watchdog timer: The WDI pin monitors system activity and generates a reset if no activity is detected within the programmed timeout period.
• Low-power operation: The IC operates with low quiescent current, making it suitable for battery-powered applications.

Advantages and Disadvantages

Advantages: - Precise voltage monitoring ensures reliable system operation. - Programmable threshold allows customization for different voltage levels. - Manual reset input provides flexibility in system control. - Watchdog timer enhances system reliability. - Small package size enables space-constrained designs.

Disadvantages: - Limited supply voltage range (1.6V to 5.5V). - Reset timeout period has fixed increments of 20ms.

Working Principles

The MAX16049ETN+T works by continuously monitoring the supply voltage using an internal voltage reference and comparator. When the voltage falls below the programmable threshold, the RESET pin is asserted, indicating a power failure or low voltage condition. The watchdog timer monitors system activity through the WDI pin. If no activity is detected within the programmed timeout period, a reset signal is generated. The manual reset input (MR) allows for external control over the reset function.

Application Field Plans

The MAX16049ETN+T can be used in various applications that require accurate voltage monitoring and reset functionality. Some potential application fields include:

1. Microcontrollers and microprocessors: Ensuring proper operation by monitoring the supply voltage and generating resets when necessary.
2. Industrial automation systems: Providing reliable voltage monitoring and reset capabilities for critical control systems.
3. Battery-powered devices: Protecting against undervoltage conditions and preventing data corruption.
4. Automotive electronics: Monitoring the vehicle's electrical system and initiating resets in case of voltage fluctuations.
5. Home automation: Safeguarding smart home devices from power supply issues and maintaining system integrity.

Alternative Models

• MAX16050ETN+T: Similar to MAX16049ETN+T, but with a different reset timeout period range.
• MAX16051ETN+T: Offers additional features such as power-fail detection and adjustable reset threshold hysteresis.

These alternative models provide similar voltage monitoring and reset functionality, but with slight variations in specifications and features.

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