MCP121-195I/TO

Product Overview

Category

The MCP121-195I/TO belongs to the category of voltage supervisors.

Use

It is used to monitor the power supply voltage level and provide a reset signal to the microcontroller in the event of a power failure or voltage drop.

Characteristics

• Package: TO-92
• Essence: Voltage monitoring and reset generation
• Packaging/Quantity: Available in tape and reel packaging, quantity varies by supplier

Specifications

• Input Voltage Range: 0.7V to 5.5V
• Reset Threshold Voltage: 1.95V
• Manual Reset Input: Active-low input for external reset
• Low Power Consumption: Typically 18 µA
• Operating Temperature Range: -40°C to 125°C

Detailed Pin Configuration

1. VDD (Input voltage)
2. GND (Ground)
3. MR (Manual reset input)
4. RESET (Output reset signal)

Functional Features

• Monitors the input voltage and asserts a reset signal when the voltage falls below the threshold.
• Provides a manual reset input for external reset control.
• Low power consumption makes it suitable for battery-powered applications.

Advantages and Disadvantages

Advantages

• Wide input voltage range
• Low power consumption
• Small form factor

Disadvantages

• Limited to single voltage monitoring

Working Principles

The MCP121-195I/TO operates by comparing the input voltage with the preset threshold. When the input voltage falls below the threshold, the reset output is asserted, indicating a power failure condition. The manual reset input allows for external control over the reset signal.

Detailed Application Field Plans

The MCP121-195I/TO is commonly used in embedded systems, IoT devices, and battery-powered applications where monitoring the power supply voltage is critical for system stability and reliability. It is often integrated into microcontroller-based designs to ensure proper operation during power fluctuations.

Detailed and Complete Alternative Models

• MCP120-300DI/TO: Similar voltage supervisor with a higher reset threshold
• MAX809: Voltage supervisor with adjustable reset threshold and manual reset input
• TC54: Microprocessor supervisory circuit with watchdog timer functionality

In conclusion, the MCP121-195I/TO is a reliable voltage supervisor offering essential features for monitoring power supply voltage levels in various electronic applications. Its compact package and low power consumption make it an ideal choice for modern embedded systems and IoT devices.

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