TL7757CPKG3

Product Overview

• Category: Integrated Circuit
• Use: Voltage Supervisor
• Characteristics: Low Power, Precision Monitoring, Adjustable Threshold
• Package: CPKG3 (Ceramic Package)
• 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, 200ms, 400ms, or 800ms
• Operating Temperature Range: -40°C to +85°C
• Quiescent Current: 10µA typical
• Output Type: Active-Low Push-Pull or Open-Drain

Detailed Pin Configuration

The TL7757CPKG3 package consists of 8 pins:

1. GND: Ground reference for the IC.
2. VCC: Positive supply voltage input.
3. MR: Manual Reset input for immediate system reset.
4. RESET: Active-low output indicating a reset condition.
5. THRESHOLD: Input pin to set/reset the threshold voltage.
6. CT: Capacitor connection for reset timeout period adjustment.
7. RESET_DELAY: Output pin indicating the reset delay period.
8. NC: No Connection.

Functional Features

• Monitors the supply voltage and provides a reset signal when it falls below a certain threshold.
• Adjustable threshold voltage allows customization for different applications.
• Precision monitoring ensures accurate detection of voltage variations.
• Low power consumption makes it suitable for battery-powered devices.
• Manual reset input allows for immediate system reset if required.
• Reset timeout period can be adjusted to meet specific timing requirements.
• Output options provide flexibility for different circuit configurations.

Advantages and Disadvantages

Advantages

• Wide supply voltage range allows compatibility with various systems.
• Adjustable threshold voltage provides flexibility for different voltage levels.
• Low quiescent current minimizes power consumption.
• Precision monitoring ensures reliable system operation.
• Multiple reset timeout options cater to diverse timing needs.

Disadvantages

• Limited pin configuration options may restrict certain circuit designs.
• Ceramic package may not be suitable for applications requiring smaller form factors.
• Lack of built-in hysteresis may result in potential oscillations near the threshold voltage.

Working Principles

The TL7757CPKG3 operates by continuously monitoring the supply voltage using an internal voltage reference. When the voltage falls below the set threshold, the reset output is activated, indicating a reset condition. The threshold voltage can be adjusted using an external resistor network or set to a fixed value. The reset timeout period determines how long the reset signal remains active after the voltage returns above the threshold.

Detailed Application Field Plans

The TL7757CPKG3 is commonly used in various applications where voltage supervision is critical. Some typical application fields include:

1. Microcontrollers: Ensuring proper system initialization and preventing data corruption during power-up or voltage fluctuations.
2. Industrial Control Systems: Monitoring power supply integrity to prevent equipment damage or malfunction.
3. Automotive Electronics: Providing reliable reset signals for microcontrollers and other critical components.
4. Battery-Powered Devices: Protecting battery life by initiating a reset when the voltage drops below a safe operating level.
5. Communication Systems: Ensuring uninterrupted operation by detecting and responding to voltage anomalies.

Detailed and Complete Alternative Models

1. TL7757C: Similar functionality but available in a different package (SOIC).
2. TL7700: Basic voltage supervisor with fixed threshold voltage and limited features.
3. MAX823: Voltage monitor with adjustable threshold and integrated watchdog timer.
4. ADM6315: Precision voltage supervisor with adjustable threshold and power-on reset delay.

These alternative models offer similar voltage monitoring capabilities but may vary in package type, additional features, or specific performance characteristics.

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