MAX708CPA

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Monitor
• Characteristics: Low-power, precision voltage monitor
• Package: 8-pin PDIP (Plastic Dual In-line Package)
• Essence: Monitors the power supply voltage and provides a reset signal when the voltage drops below a certain threshold
• Packaging/Quantity: Tube packaging, 25 pieces per tube

Specifications

• Supply Voltage Range: 1.0V to 6.0V
• Reset Threshold Voltage Options: 4.63V, 4.38V, 4.00V, 2.93V, 2.63V, 2.32V, 2.00V, 1.75V
• Reset Timeout Period: 140ms (min)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The MAX708CPA has the following pin configuration:

1. GND: Ground connection
2. RESET: Active-low reset output
3. VCC: Positive power supply input
4. MR: Manual reset input
5. TH: Threshold voltage selection input
6. TR: Reset timeout period selection input
7. CT: Capacitor connection for reset timeout period
8. VBAT: Battery backup input

Functional Features

• Monitors the power supply voltage continuously
• Provides a reset signal when the voltage drops below the selected threshold
• Offers manual reset capability through the MR pin
• Allows selection of different threshold voltages and reset timeout periods
• Supports battery backup operation through the VBAT pin

Advantages and Disadvantages

Advantages: - Low-power consumption - Precision voltage monitoring - Wide operating voltage range - Flexible threshold voltage and reset timeout period options

Disadvantages: - Limited number of threshold voltage options - No built-in hysteresis for voltage monitoring

Working Principles

The MAX708CPA operates by comparing the power supply voltage with the selected threshold voltage. When the voltage drops below the threshold, the reset output is activated, indicating a power failure or low voltage condition. The reset signal remains active until the voltage rises above the threshold or a manual reset is triggered.

Detailed Application Field Plans

The MAX708CPA is commonly used in various applications where reliable voltage monitoring is crucial. Some of the typical application fields include:

1. Microcontrollers and Microprocessors: Ensures proper system initialization and prevents erratic behavior during power-up or voltage fluctuations.
2. Embedded Systems: Protects critical components from voltage drops, ensuring stable operation and preventing data corruption.
3. Power Supply Units: Monitors the input voltage to detect power failures and initiate appropriate actions, such as shutting down the system safely.
4. Battery-Powered Devices: Provides low-voltage detection to prevent excessive discharge and extend battery life.

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the MAX708CPA are:

1. MAX809: Low-power microprocessor reset circuits with different package options.
2. MAX811: Voltage monitor with manual reset and adjustable threshold voltage.
3. MAX703: Ultra-low-power voltage monitor with integrated watchdog timer.

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

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