MAX819LCPA

Product Overview

• Category: Integrated Circuit (IC)
• Use: Power Supply Monitor
• Characteristics: Low-power, high-accuracy, voltage monitoring
• Package: 8-pin PDIP (Plastic Dual In-line Package)
• Essence: Monitors the voltage level of a power supply and provides an output signal to indicate if the voltage is within the desired range.
• Packaging/Quantity: Tube packaging, 25 units per tube

Specifications

• Supply Voltage Range: 2.7V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Quiescent Current: 10µA (typical)
• Threshold Accuracy: ±1.5%
• Output Type: Active-Low Open-Drain
• Output Sink Current: 20mA (maximum)

Detailed Pin Configuration

The MAX819LCPA has the following pin configuration:

1. GND (Ground): Connected to the ground reference of the system.
2. VCC (Supply Voltage): Connected to the positive supply voltage.
3. RESET (Reset Output): Active-low open-drain output that indicates the power supply is below the threshold voltage.
4. MR (Manual Reset Input): Active-low input used to manually reset the device.
5. TH (Threshold Input): Sets the threshold voltage for the power supply monitor.
6. NC (No Connection): Not connected internally, can be left unconnected or used for additional functionality.
7. NC (No Connection): Not connected internally, can be left unconnected or used for additional functionality.
8. GND (Ground): Connected to the ground reference of the system.

Functional Features

• Monitors the voltage level of a power supply and provides a reset signal when the voltage falls below the set threshold.
• Active-low open-drain output allows easy interfacing with other devices.
• Low quiescent current ensures minimal power consumption.
• Wide supply voltage range allows compatibility with various systems.
• High threshold accuracy provides precise monitoring.

Advantages and Disadvantages

Advantages

• Low-power consumption extends battery life in portable applications.
• Accurate voltage monitoring helps prevent system malfunctions.
• Easy integration with other devices due to open-drain output.
• Wide supply voltage range enhances versatility.

Disadvantages

• Limited sink current capability may not be suitable for high-current applications.
• Only available in an 8-pin PDIP package, limiting space-constrained designs.

Working Principles

The MAX819LCPA operates by comparing the voltage at the TH (Threshold) pin with an internal reference voltage. When the power supply voltage falls below the threshold voltage, the RESET pin is pulled low, indicating a power failure. The device remains in this state until the power supply voltage rises above the threshold and a manual reset signal is applied to the MR (Manual Reset) pin.

Detailed Application Field Plans

The MAX819LCPA finds applications in various fields, including:

1. Battery-powered devices: Monitors battery voltage to prevent over-discharge and protect sensitive electronics.
2. Industrial equipment: Ensures stable power supply for critical components, preventing damage or data loss during voltage fluctuations.
3. Automotive systems: Detects power supply failures and triggers appropriate actions to avoid system malfunction or accidents.
4. Home appliances: Provides reliable power monitoring for safety-critical functions, such as motor control or temperature regulation.

Detailed and Complete Alternative Models

1. MAX809L: Similar functionality with a higher threshold accuracy of ±0.5%.
2. MAX823: Offers additional features like adjustable threshold voltage and manual reset timeout.
3. MAX6715: Provides dual-voltage monitoring with independent threshold settings for each voltage.

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