MCP121T-195I/TT

Product Overview

Category

The MCP121T-195I/TT belongs to the category of voltage supervisors.

Use

It is primarily used for monitoring and controlling the voltage levels in electronic circuits.

Characteristics

• Voltage range: 1.95V
• Package type: SOT-23
• Essence: Voltage supervisor with manual reset input
• Packaging/Quantity: Tape and reel, 3000 units per reel

Specifications

The MCP121T-195I/TT has the following specifications:

• Supply voltage range: 1.0V to 6.0V
• Reset threshold voltage: 1.95V
• Manual reset input
• Active-low reset output
• Low supply current: 5µA (typical)
• Operating temperature range: -40°C to +125°C

Detailed Pin Configuration

The MCP121T-195I/TT has a standard SOT-23 package with three pins:

1. VDD: Connects to the positive supply voltage.
2. GND: Connects to the ground or negative supply voltage.
3. RESET: Provides the active-low reset signal.

Functional Features

The MCP121T-195I/TT offers the following functional features:

• Voltage monitoring: It continuously monitors the supply voltage and generates a reset signal when it falls below the specified threshold.
• Manual reset input: It includes a manual reset input pin that allows an external signal to reset the device.
• Active-low reset output: The reset output becomes active-low when the monitored voltage drops below the threshold.
• Low supply current: It consumes very low power, making it suitable for battery-powered applications.
• Wide operating temperature range: It can operate reliably in extreme temperature conditions.

Advantages and Disadvantages

Advantages

• Accurate voltage monitoring ensures reliable operation of electronic circuits.
• Manual reset input provides flexibility in controlling the reset function.
• Low supply current minimizes power consumption.
• Wide operating temperature range allows for use in various environments.

Disadvantages

• The fixed reset threshold voltage may not be suitable for all applications requiring different voltage levels.
• Limited package options may restrict its use in certain circuit designs.

Working Principles

The MCP121T-195I/TT works based on a voltage comparator circuit. It compares the monitored voltage with the preset threshold voltage (1.95V) and generates a reset signal when the voltage drops below this threshold. The manual reset input allows an external signal to override the monitoring function and manually reset the device.

Detailed Application Field Plans

The MCP121T-195I/TT finds applications in various fields, including:

1. Power management systems: It ensures stable voltage levels in power supplies, preventing damage to sensitive components.
2. Microcontroller-based systems: It provides a reliable reset mechanism for microcontrollers, ensuring proper initialization after power-up or system faults.
3. Battery-powered devices: It helps monitor battery voltage and triggers a reset when the battery voltage drops below a critical level.
4. Industrial automation: It can be used in control systems to monitor and maintain voltage stability in industrial equipment.

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the MCP121T-195I/TT include:

1. MAX823: Voltage supervisor with adjustable reset threshold and manual reset input.
2. TPS3808: Precision voltage supervisor with programmable delay time and manual reset input.
3. ADM6315: Microprocessor supervisory circuit with adjustable reset threshold and watchdog timer.

These alternative models provide flexibility in terms of adjustable reset thresholds, additional features, and different package options, catering to diverse application requirements.

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