TC642VPA

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Supervisor
• Characteristics: Precision monitoring, low power consumption, small package size
• Package: PDIP-8, SOIC-8
• Essence: Monitors voltage levels and provides reset signals to microcontrollers or other digital systems.
• Packaging/Quantity: Available in reels of 2500 units or tubes of 50 units.

Specifications

• Supply Voltage Range: 2.5V to 6.0V
• Reset Threshold Voltage Options: 4.38V, 4.63V, 4.88V, 5.13V, 5.38V, 5.63V, 5.88V, 6.13V
• Reset Timeout Period Options: 1.25ms, 20ms, 140ms, 1120ms
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The TC642VPA has a total of 8 pins:

1. GND: Ground reference for the IC.
2. VCC: Positive supply voltage input.
3. MR: Manual Reset input pin.
4. RESET: Active-low reset output.
5. VTH: Voltage threshold selection pin.
6. TO: Reset timeout period selection pin.
7. CT: Capacitor connection pin for reset timeout period.
8. OUT: Open-drain output for monitoring purposes.

Functional Features

• Precision voltage monitoring with selectable threshold options.
• Adjustable reset timeout period for customized applications.
• Manual reset option for immediate system reset.
• Open-drain output for easy integration with various systems.
• Low power consumption for energy-efficient designs.
• Wide operating temperature range for versatile usage.

Advantages

• Provides reliable voltage monitoring, ensuring system stability.
• Flexible threshold and timeout period options for diverse applications.
• Small package size allows for space-saving designs.
• Easy integration with microcontrollers and digital systems.
• Low power consumption extends battery life in portable devices.

Disadvantages

• Limited to voltage monitoring and reset functionality only.
• Requires external components (capacitor) for reset timeout period adjustment.
• Not suitable for high-voltage applications.

Working Principles

The TC642VPA monitors the input voltage level and compares it with the selected threshold voltage. If the voltage drops below the threshold, the reset output is activated, signaling a system reset. The reset remains active until the voltage rises above the threshold or the specified timeout period elapses. The IC operates by continuously monitoring the voltage and providing a stable reset signal to ensure proper system operation.

Detailed Application Field Plans

The TC642VPA finds applications in various fields, including:

1. Embedded Systems: Provides voltage supervision for microcontrollers, ensuring reliable operation.
2. Power Management: Monitors power supply voltages to protect sensitive electronic components.
3. Industrial Control Systems: Ensures proper functioning of control units by resetting them during voltage fluctuations.
4. Automotive Electronics: Guards against voltage drops, preventing system malfunctions in vehicles.
5. Consumer Electronics: Protects digital devices from unstable power sources, enhancing their reliability.

Detailed and Complete Alternative Models

1. MAX809: Voltage supervisor with similar features and package options.
2. ADM708: Precision voltage monitor with adjustable timeout period.
3. TPS383: Ultra-low-power voltage supervisor with wide operating temperature range.

These alternative models offer comparable functionality and can be considered as substitutes for the TC642VPA in specific applications.

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