MAX6421XS17+T

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Supervisor
• Characteristics: Low-power, precision voltage monitoring
• Package: SOT23-5
• Essence: Monitors the power supply voltage and provides a reset signal when the voltage falls below a certain threshold.
• Packaging/Quantity: Tape and Reel, 3000 units per reel

Specifications

• Supply Voltage Range: 1.6V to 5.5V
• Reset Threshold Voltage Options: 2.93V, 3.08V, 3.63V, 4.38V
• Reset Timeout Period: 140ms, 560ms, 1120ms, or adjustable
• Quiescent Current: 1.5µA (typical)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The MAX6421XS17+T has a total of 5 pins:

1. GND: Ground connection
2. RESET: Active-low reset output
3. MR: Manual reset input
4. VCC: Positive power supply input
5. TH: Threshold voltage selection pin

Functional Features

• Precision voltage monitoring: The MAX6421XS17+T accurately monitors the power supply voltage and generates a reset signal when it falls below the specified threshold.
• Adjustable reset timeout period: The device allows for an adjustable reset timeout period, providing flexibility in different applications.
• Manual reset capability: The MR pin allows for manual resetting of the device, overriding the automatic reset function.
• Low quiescent current: With a typical quiescent current of only 1.5µA, the MAX6421XS17+T is designed for low-power applications.

Advantages and Disadvantages

Advantages: - Accurate voltage monitoring - Adjustable reset timeout period - Manual reset capability - Low quiescent current

Disadvantages: - Limited threshold voltage options - SOT23-5 package may not be suitable for all applications

Working Principles

The MAX6421XS17+T operates by continuously monitoring the power supply voltage connected to the VCC pin. When the voltage falls below the selected threshold, the device generates an active-low reset signal on the RESET pin. The reset signal remains active until the voltage rises above the threshold or a manual reset is triggered through the MR pin.

Detailed Application Field Plans

The MAX6421XS17+T is commonly used in various applications where reliable voltage monitoring and reset functionality are required. Some of the typical application fields include:

1. Microcontrollers: Ensuring proper operation by monitoring the power supply voltage and initiating a reset if necessary.
2. Embedded Systems: Providing voltage supervision to prevent erratic behavior or data corruption during power fluctuations.
3. Battery-Powered Devices: Monitoring battery voltage to prevent damage due to undervoltage conditions.
4. Industrial Control Systems: Ensuring stable operation by monitoring power supply integrity and initiating a reset if needed.

Detailed and Complete Alternative Models

1. MAX6422XS17+T: Similar to MAX6421XS17+T but with additional features such as adjustable hysteresis and watchdog timer functionality.
2. MAX6423XS17+T: Voltage supervisor with a wider range of threshold voltage options and adjustable reset timeout period.
3. MAX6424XS17+T: Enhanced version with integrated power-on reset delay and adjustable reset timeout period.

These alternative models offer similar voltage monitoring and reset capabilities, but with additional features and flexibility depending on specific application requirements.

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