MAX638AC/D

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Monitor
• Characteristics: Low-power, Precision, Adjustable Threshold
• Package: 8-pin SOIC (Small Outline Integrated Circuit)
• Essence: Monitors voltage levels and provides a digital output based on the threshold set by the user.
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 2.5V to 11V
• Threshold Voltage Options: Adjustable from 1.22V to 5.0V in 100mV increments
• Operating Temperature Range: -40°C to +85°C
• Quiescent Current: 10µA (typical)

Pin Configuration

The MAX638AC/D has the following pin configuration:

1. GND: Ground
2. TRIP: Output indicating the monitored voltage is below the threshold
3. VCC: Supply Voltage
4. RESET: Active-low reset input
5. TH: Threshold voltage adjustment pin
6. MR: Manual reset input
7. NC: No Connection
8. VCC: Supply Voltage

Functional Features

• Monitors the input voltage and compares it with the threshold voltage set by the user.
• Provides an active-low reset signal when the input voltage falls below the threshold.
• Adjustable threshold voltage allows flexibility in monitoring different voltage levels.
• Low quiescent current ensures minimal power consumption.

Advantages and Disadvantages

Advantages

• Precise voltage monitoring with adjustable threshold.
• Low-power operation for energy-efficient applications.
• Small form factor package for space-constrained designs.
• Easy integration into existing circuits.

Disadvantages

• Limited threshold voltage options in 100mV increments.
• Not suitable for high-voltage applications above 11V.

Working Principles

The MAX638AC/D operates by comparing the input voltage with the threshold voltage set by the user. When the input voltage falls below the threshold, the device generates an active-low reset signal. The threshold voltage can be adjusted using the TH pin, allowing customization for different voltage monitoring requirements. The low quiescent current ensures minimal power consumption during operation.

Detailed Application Field Plans

The MAX638AC/D finds applications in various fields where voltage monitoring is critical. Some potential application areas include:

1. Battery-Powered Devices: Ensuring proper battery voltage levels to prevent damage or unexpected shutdowns.
2. Power Supply Monitoring: Detecting undervoltage conditions to trigger corrective actions or system shutdowns.
3. Industrial Control Systems: Monitoring voltage levels in control circuits to ensure stable and reliable operation.
4. Automotive Electronics: Voltage monitoring for automotive systems to prevent malfunctions and protect sensitive components.

Detailed and Complete Alternative Models

1. MAX638BC/D: Similar to MAX638AC/D but with a different package (10-pin µMAX).
2. MAX638CC/D: Higher supply voltage range (up to 16V) compared to MAX638AC/D.
3. MAX638DC/D: Adjustable threshold voltage options in 50mV increments for finer granularity.

These alternative models offer similar functionality with slight variations in package type, supply voltage range, and threshold voltage options.

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