MAX6426UK39+T

Product Overview

• Category: Integrated Circuit
• Use: Voltage Supervisor
• Characteristics: Low-power, adjustable threshold voltage, small package size
• Package: SOT23-5
• Essence: Monitors the power supply voltage and generates a reset signal when the voltage falls below a certain threshold.
• Packaging/Quantity: Tape and Reel, 3000 units per reel

Specifications

• Supply Voltage Range: 1.8V to 5.5V
• Adjustable Threshold Voltage Range: 0.4V to 5V
• Quiescent Current: 3µA (typical)
• Reset Timeout Period: 140ms (typical)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The MAX6426UK39+T has a total of 5 pins:

1. GND: Ground pin
2. RESET: Output reset signal
3. MR: Manual reset input
4. TH: Threshold voltage adjustment pin
5. VCC: Power supply input

Functional Features

• Monitors the power supply voltage and generates a reset signal when the voltage falls below the set threshold.
• Adjustable threshold voltage allows customization for different applications.
• Low quiescent current ensures minimal power consumption.
• Reset timeout period prevents false resets during power fluctuations.

Advantages and Disadvantages

Advantages: - Wide supply voltage range allows compatibility with various systems. - Small package size enables space-saving designs. - Adjustable threshold voltage provides flexibility in different voltage monitoring scenarios.

Disadvantages: - Limited reset timeout period may not be suitable for all applications requiring longer timeouts. - Manual reset input may require additional external components for proper functionality.

Working Principles

The MAX6426UK39+T operates by continuously monitoring the power supply voltage through the TH pin. When the voltage falls below the threshold set by the TH pin, the RESET pin is asserted, generating a reset signal. The reset signal remains active until the power supply voltage rises above the threshold or a manual reset is triggered through the MR pin.

Detailed Application Field Plans

The MAX6426UK39+T finds applications in various fields, including: 1. Microcontrollers and microprocessors: Ensures proper system initialization and prevents erratic behavior during power-up. 2. Battery-powered devices: Monitors battery voltage to prevent damage due to undervoltage conditions. 3. Industrial control systems: Provides reliable reset signals for critical components in industrial automation. 4. Automotive electronics: Ensures stable operation of automotive systems by monitoring power supply voltages.

Detailed and Complete Alternative Models

1. MAX6427UK29+T: Similar voltage supervisor with a fixed threshold voltage of 2.9V.
2. MAX6428UK26+T: Voltage supervisor with adjustable threshold voltage and a higher reset timeout period.
3. MAX6429UK18+T: Voltage supervisor with a fixed threshold voltage of 1.8V and extended operating temperature range.

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