TL7757CD

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: 100ms or 200ms
• Operating Temperature Range: -40°C to +85°C
• Output Type: Active-Low Push-Pull or Open-Drain

Pin Configuration

The TL7757CD IC has a total of 8 pins arranged as follows:

```

---

| | --| VCC GND |-- Pin 1: Supply Voltage (VCC) --| RESET OUT |-- Pin 2: Reset Output --| THRESHOLD |-- Pin 3: Threshold Input --| GND |-- Pin 4: Ground (GND) --| MR |-- Pin 5: Manual Reset Input --| RESET IN |-- Pin 6: Reset Input --| RESET |-- Pin 7: Reset Output |___________| ```

Functional Features

• Monitors the supply voltage and generates a reset signal when it falls below a specified threshold.
• Provides an adjustable threshold option for flexibility in different applications.
• Offers a manual reset input for external control of the reset signal.
• Supports active-low push-pull or open-drain output configurations.

Advantages and Disadvantages

Advantages: - Low-power consumption makes it suitable for battery-powered devices. - Precision voltage monitoring ensures reliable system operation. - Adjustable threshold allows customization for specific requirements.

Disadvantages: - Limited reset timeout options may not be suitable for all applications. - Only available in SOIC package, limiting compatibility with other package types.

Working Principles

The TL7757CD is designed to monitor the supply voltage of a system. It compares the input voltage with a reference threshold and generates a reset signal when the voltage falls below this threshold. The reset signal remains active until the supply voltage rises above the threshold or a manual reset input is triggered.

Detailed Application Field Plans

The TL7757CD is commonly used in various applications where voltage monitoring and system reset functionality are required. Some typical application fields include:

1. Microcontrollers: Ensuring proper system initialization and preventing data corruption during power fluctuations.
2. Industrial Control Systems: Providing reliable reset signals for critical equipment in manufacturing processes.
3. Automotive Electronics: Monitoring battery voltage and triggering system resets to prevent damage to sensitive components.
4. Power Management: Safeguarding power supplies by detecting undervoltage conditions and initiating corrective actions.

Detailed and Complete Alternative Models

1. TL7759CD: Similar to TL7757CD but with additional watchdog timer functionality.
2. TL7705ACP: Fixed threshold voltage supervisor with a wider supply voltage range.
3. MAX809: Low-power microprocessor reset circuits with adjustable/resettable thresholds.

These alternative models offer similar voltage monitoring and reset capabilities, providing options for different design requirements.

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