TL7757CDR

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Supervisor
• Characteristics: Low Power, Precision, Adjustable Threshold
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: Monolithic CMOS Voltage Supervisor
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 1.2V to 5.5V
• Threshold Voltage Options: Adjustable or Fixed
• Reset Timeout Period: 200ms (Typical)
• Operating Temperature Range: -40°C to +85°C
• Output Type: Active-Low Push-Pull or Open-Drain

Pin Configuration

The TL7757CDR IC has the following pin configuration:

```

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| | --| VCC GND |-- Pin 1: Supply Voltage (VCC) --| RESET OUT |-- Pin 2: Reset Output --| THRESHOLD |-- Pin 3: Threshold Input --| GND GND |-- Pin 4: Ground (GND) |___________| ```

Functional Features

• Monitors supply voltage and provides a reset signal when it falls below a certain threshold.
• Adjustable threshold option allows customization for different applications.
• Low power consumption makes it suitable for battery-powered devices.
• Precision voltage monitoring ensures reliable operation.
• Reset timeout period prevents false resets during power fluctuations.

Advantages

• Wide supply voltage range enables compatibility with various systems.
• Adjustable threshold provides flexibility in voltage monitoring.
• Low power consumption extends battery life in portable devices.
• Precision voltage monitoring enhances system reliability.
• Reset timeout period prevents unnecessary system resets.

Disadvantages

• Limited number of pins restricts additional functionality.
• Lack of built-in hysteresis may lead to oscillations near the threshold voltage.

Working Principles

The TL7757CDR is a monolithic CMOS voltage supervisor IC. It continuously monitors the supply voltage and compares it with a preset threshold voltage. When the supply voltage falls below the threshold, the reset output is activated, indicating a power failure or low voltage condition. The reset signal remains active until the supply voltage rises above the threshold and a timeout period elapses.

Detailed Application Field Plans

The TL7757CDR is commonly used in various applications where reliable voltage monitoring is crucial. Some of the typical application fields include:

1. Microcontrollers: Ensuring proper operation by monitoring the supply voltage.
2. Industrial Control Systems: Preventing data corruption during power fluctuations.
3. Automotive Electronics: Protecting sensitive components from voltage drops.
4. Battery-Powered Devices: Extending battery life by implementing efficient power management.
5. Communication Systems: Maintaining stable operation by monitoring power supply integrity.

Detailed and Complete Alternative Models

• TL7759: Similar functionality with adjustable threshold and additional features.
• TL7700: Fixed threshold voltage supervisor with lower power consumption.
• MAX823: Precision voltage monitor with adjustable threshold and integrated watchdog timer.

(Note: This list is not exhaustive and there are other alternative models available in the market.)

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