LTC1232CS8#TRPBF

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Monitor and Reset Circuit
• Characteristics: Low-power, precision voltage monitor with adjustable reset timeout delay
• Package: 8-pin SOIC (Small Outline Integrated Circuit)
• Essence: Provides a reliable way to monitor the voltage level of a system and generate a reset signal when necessary.
• Packaging/Quantity: Available in tape and reel packaging, with a quantity of 2500 units per reel.

Specifications

• Supply Voltage Range: 2.7V to 5.5V
• Adjustable Reset Timeout Delay: 1ms to 10s
• Operating Temperature Range: -40°C to +85°C
• Quiescent Current: 20µA (typical)
• Reset Threshold Accuracy: ±1.5%
• Power-On Reset Output: Active Low
• Manual Reset Input: Active Low
• Watchdog Timer Input: Active High

Pin Configuration

The LTC1232CS8#TRPBF IC has the following pin configuration:

```

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| | --| RESET |-- --| THRESHOLD |-- --| GND |-- --| MR |-- --| WDI |-- --| VCC |-- --| RESET OUT |-- |___________| ```

Functional Features

1. Voltage Monitoring: The LTC1232CS8#TRPBF monitors the input voltage and compares it to a programmable threshold. When the voltage drops below the threshold, the reset output is activated.
2. Adjustable Reset Timeout: The IC allows the user to set the reset timeout delay according to their specific requirements, ranging from 1ms to 10s.
3. Power-On Reset: Upon power-up, the IC generates a reset pulse to ensure a controlled start-up of the system.
4. Manual Reset Input: The manual reset input allows an external signal to force a reset, overriding the voltage monitoring function.
5. Watchdog Timer Input: The IC includes a watchdog timer input that can be used to monitor the activity of the system and generate a reset if necessary.

Advantages and Disadvantages

Advantages: - Low-power consumption - Adjustable reset timeout delay - Accurate voltage threshold monitoring - Small package size for space-constrained applications

Disadvantages: - Limited supply voltage range (2.7V to 5.5V) - Requires additional external components for proper operation

Working Principles

The LTC1232CS8#TRPBF operates by continuously monitoring the input voltage using an internal voltage comparator. The user can set the desired voltage threshold using external resistors. When the input voltage drops below this threshold, the reset output is activated, signaling a low-voltage condition. The reset remains active until the voltage rises above the threshold or the reset timeout period elapses.

The IC also includes a power-on reset circuit that generates a reset pulse upon power-up, ensuring a controlled start-up of the system. Additionally, the manual reset input allows an external signal to force a reset, overriding the voltage monitoring function. The watchdog timer input monitors the activity of the system and generates a reset if no activity is detected within a specified time period.

Application Field Plans

The LTC1232CS8#TRPBF finds applications in various fields where voltage monitoring and reset functionality are critical. Some potential application areas include:

1. Microcontrollers and Microprocessors: Ensuring reliable system startup and preventing data corruption during power fluctuations.
2. Battery-Powered Devices: Protecting against undervoltage conditions and extending battery life.
3. Industrial Control Systems: Monitoring power supply integrity and providing a fail-safe mechanism.
4. Automotive Electronics: Preventing system malfunction due to voltage drops or transients.
5. Home Automation Systems: Ensuring stable operation and preventing damage to connected devices.

Alternative Models

1. MAX1232: Similar voltage monitor and reset circuit with adjustable timeout delay.
2. ADM803: Low-power microprocessor supervisory circuit with adjustable reset threshold.
3. TPS3808: Precision voltage supervisor with programmable reset delay and manual reset input.

These alternative models offer similar functionality and can be considered as alternatives to the LTC1232CS8#TRPBF depending on specific requirements.

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