MIC809LYC3

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Supervisor
• Characteristics: Low-power, reset output, manual reset input, watchdog timer, adjustable threshold voltage
• Package: SOT-23-3
• Essence: Monolithic CMOS microprocessor supervisory circuit
• Packaging/Quantity: Tape and Reel, 3000 units per reel

Specifications

• Supply Voltage Range: 1.6V to 5.5V
• Reset Threshold Voltage Options: 2.63V, 2.93V, 3.08V, 4.38V
• Reset Timeout Period: 140ms (typical)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The MIC809LYC3 IC has three pins arranged in a SOT-23-3 package:

1. RESET (Pin 1): Reset Output. Active low signal indicating the device is in reset state.
2. GND (Pin 2): Ground connection.
3. VCC (Pin 3): Supply Voltage Input.

Functional Features

• Voltage Supervision: The MIC809LYC3 monitors the supply voltage and asserts the reset output when it falls below the specified threshold voltage.
• Manual Reset Input: A manual reset input pin allows an external signal to force a reset condition.
• Watchdog Timer: The integrated watchdog timer ensures system integrity by resetting the device if a software or hardware failure occurs.
• Adjustable Threshold Voltage: The reset threshold voltage can be selected from multiple options to suit different applications.

Advantages and Disadvantages

Advantages

• Low-power consumption, suitable for battery-powered devices.
• Small form factor and easy integration into compact designs.
• Wide supply voltage range allows compatibility with various systems.
• Adjustable threshold voltage provides flexibility for different voltage levels.

Disadvantages

• Limited number of reset threshold voltage options.
• Lack of additional advanced features compared to some competing models.

Working Principles

The MIC809LYC3 operates by continuously monitoring the supply voltage. When the voltage drops below the selected threshold, the reset output is asserted, indicating a reset condition. The device also includes a watchdog timer that must be periodically reset to prevent a system reset. If the watchdog timer is not reset within the specified timeout period, the device will assert the reset output.

Detailed Application Field Plans

The MIC809LYC3 is commonly used in various applications where reliable voltage supervision is required. Some typical application fields include:

1. Microcontrollers: Ensuring proper reset and system integrity during power-up and brownout conditions.
2. Embedded Systems: Monitoring power supply stability and preventing erratic behavior.
3. Battery-Powered Devices: Protecting against undervoltage conditions and preserving battery life.
4. Industrial Control Systems: Providing reliable reset functionality for critical control units.
5. Automotive Electronics: Ensuring proper operation of electronic modules under varying voltage conditions.

Detailed and Complete Alternative Models

1. MIC803: Similar voltage supervisor IC with fixed threshold voltage options.
2. MAX809: Voltage monitor IC with adjustable threshold voltage and additional features.
3. TL7705: Microprocessor supervisory circuit with adjustable threshold voltage and watchdog timer.

These alternative models offer similar functionality and can be considered based on specific requirements and preferences.

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