TCM812LERCTR

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Supervisor and Reset Generator

Characteristics: - Monitors the power supply voltage of a system - Generates a reset signal when the voltage falls below a specified threshold - Ensures proper functioning of the system during power fluctuations - Protects sensitive components from damage due to low voltage conditions

Package: SOP-8 (Small Outline Package)

Essence: The TCM812LERCTR is an essential component in electronic systems that require reliable voltage monitoring and reset generation capabilities.

Packaging/Quantity: The TCM812LERCTR is typically available in reels containing 2500 units.

Specifications

• Supply Voltage Range: 1.6V to 6.0V
• Threshold Voltage Options: 2.5V, 3.0V, 3.3V, 4.38V, 4.63V, 4.88V
• Reset Timeout Period: Adjustable or Fixed (140ms, 280ms, 560ms, 1120ms)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The TCM812LERCTR features the following pin configuration:

1. GND (Ground): Connected to the ground reference of the system.
2. MR (Master Reset): Active-low input used to manually reset the system.
3. VDD (Supply Voltage): Connected to the positive supply voltage of the system.
4. RESET (Reset Output): Active-low output that generates a reset signal when the monitored voltage falls below the threshold.
5. VIT (Voltage Input): Connected to the voltage source being monitored.
6. CT (Timeout Capacitor): Connected to an external capacitor to set the reset timeout period.
7. TH (Threshold): Connected to an external resistor divider network to set the voltage threshold.
8. NC (No Connection): This pin is not connected and should be left unconnected.

Functional Features

• Monitors the input voltage continuously.
• Generates a reset signal when the voltage falls below the set threshold for a specified timeout period.
• Provides a reliable reset output to ensure proper system operation during power fluctuations.
• Offers adjustable or fixed reset timeout options to suit different application requirements.
• Low quiescent current consumption for power-efficient operation.
• Built-in glitch immunity to prevent false resets caused by voltage transients.

Advantages and Disadvantages

Advantages: - Accurate voltage monitoring and reset generation. - Wide supply voltage range allows compatibility with various systems. - Adjustable or fixed reset timeout options provide flexibility. - Low power consumption for energy-efficient operation. - Glitch immunity ensures reliable performance in noisy environments.

Disadvantages: - Limited threshold voltage options may not cover all voltage monitoring requirements. - SOP-8 package may not be suitable for space-constrained applications.

Working Principles

The TCM812LERCTR operates by comparing the monitored voltage at the VIT pin with the threshold voltage set using an external resistor divider network connected to the TH pin. When the monitored voltage falls below the threshold, the internal circuitry triggers a reset signal on the RESET pin. The reset signal remains active for the duration of the timeout period, which can be adjusted using an external capacitor connected to the CT pin. Once the timeout period elapses, the reset signal is released, allowing the system to resume normal operation.

Detailed Application Field Plans

The TCM812LERCTR finds applications in various electronic systems that require reliable voltage monitoring and reset generation. Some potential application fields include:

1. Microcontroller-based Systems: Ensures proper functioning of microcontroller-based systems by providing a reset signal during power fluctuations or low voltage conditions.
2. Industrial Control Systems: Protects sensitive components in industrial control systems from damage caused by voltage drops or power supply instabilities.
3. Automotive Electronics: Monitors the vehicle's electrical system to prevent malfunctions and ensure safe operation of automotive electronics.
4. Power Supply Units: Provides voltage monitoring and reset generation capabilities in power supply units to protect connected devices from unstable power conditions.

Detailed and Complete Alternative Models

1. TCM809LERCTR: Similar functionality with fixed threshold voltage options and adjustable reset timeout period.
2. MAX811LEUS+T: Voltage supervisor IC with adjustable threshold voltage and fixed reset timeout period.
3. ADM708RARZ: Integrated circuit offering voltage monitoring and reset generation features with adjustable threshold voltage and reset timeout period.

These alternative models provide similar functionalities to the TCM812LERCTR and can be considered as alternatives based on specific application requirements.

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