MCP121T-240E/LB

Product Overview

Category

The MCP121T-240E/LB 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: 2.0V to 6.0V
• Output Type: Active Low
• Reset Threshold Voltage: 2.40V
• Quiescent Current: 5µA (typical)
• Operating Temperature Range: -40°C to +85°C
• Package Type: SOT-23-3
• RoHS Compliant: Yes

Packaging/Quantity

The MCP121T-240E/LB is available in a SOT-23-3 package. It is typically sold in reels containing 3000 units per reel.

Specifications

• Supply Voltage Range: 2.0V to 6.0V
• Reset Threshold Voltage: 2.40V
• Reset Timeout Period: 140ms (typical)
• Quiescent Current: 5µA (typical)
• Power-On Reset Delay: 100ms (typical)
• Operating Temperature Range: -40°C to +85°C
• Input Capacitance: 10pF (typical)
• Output Sink Current: 20mA (maximum)

Detailed Pin Configuration

The MCP121T-240E/LB has three pins:

1. VDD: This pin is connected to the power supply voltage.
2. GND: This pin is connected to the ground.
3. RESET: This pin outputs an active low signal when the voltage falls below the reset threshold.

Functional Features

• Voltage Monitoring: The MCP121T-240E/LB continuously monitors the input voltage and provides a reset signal when it falls below the reset threshold.
• Active Low Output: The reset signal is active low, meaning it goes low when the voltage falls below the threshold.
• Reset Timeout: The reset signal remains low for a specific timeout period (140ms typical) after the voltage rises above the threshold.

Advantages and Disadvantages

Advantages

• Wide operating voltage range allows compatibility with various electronic circuits.
• Low quiescent current minimizes power consumption.
• Small package size enables space-saving designs.
• RoHS compliance ensures environmental friendliness.

Disadvantages

• Fixed reset threshold voltage may not be suitable for all applications.
• Limited output sink current may restrict usage in certain high-current scenarios.

Working Principles

The MCP121T-240E/LB operates by comparing the input voltage with the preset reset threshold voltage. When the voltage falls below the threshold, the reset pin outputs an active low signal. This signal remains low for a specific timeout period, even if the voltage rises above the threshold during that time. Once the timeout period elapses, the reset signal returns to its inactive state.

Detailed Application Field Plans

The MCP121T-240E/LB finds applications in various fields, including but not limited to: 1. Power supply monitoring in embedded systems. 2. Battery-powered devices to prevent undervoltage conditions. 3. Microcontroller-based systems requiring reliable reset functionality. 4. Industrial automation and control systems. 5. Automotive electronics for voltage supervision.

Detailed and Complete Alternative Models

1. MCP121T-195E/TT: Similar to MCP121T-240E/LB, but with a lower reset threshold voltage of 1.95V.
2. MCP121T-330E/TT: Similar to MCP121T-240E/LB, but with a higher reset threshold voltage of 3.30V.
3. MCP121T-120E/TT: Similar to MCP121T-240E/LB, but with a lower reset threshold voltage of 1.20V.
4. MCP121T-500E/TT: Similar to MCP121T-240E/LB, but with a higher reset threshold voltage of 5.00V.

These alternative models provide flexibility in choosing the appropriate reset threshold voltage for specific application requirements.

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