TL7757IPK

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Supervisor
• Characteristics: Low-power, Precision, Reset Generation
• Package: DIP (Dual In-line Package)
• Essence: Monolithic CMOS Voltage Supervisor
• Packaging/Quantity: Tube/50 pieces per tube

Specifications

• Supply Voltage Range: 1.2V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Reset Threshold Voltage Options: 2.32V, 2.93V, 3.08V, 4.63V
• Reset Timeout Period Options: 140ms, 560ms, 1120ms, 2240ms
• Quiescent Current: 10µA (typical)

Detailed Pin Configuration

The TL7757IPK has a standard DIP package with 8 pins. The pin configuration is as follows:

1. GND: Ground
2. VCC: Supply Voltage
3. MR: Manual Reset Input
4. RESET: Reset Output
5. TH: Threshold Voltage Selection
6. TO: Timeout Period Selection
7. CT: Capacitor Terminal
8. NC: No Connection

Functional Features

• Monitors the supply voltage and generates a reset signal when it falls below a specified threshold.
• Provides manual reset capability through the MR pin.
• Offers multiple threshold voltage and timeout period options for flexibility in different applications.
• Low quiescent current consumption makes it suitable for battery-powered devices.
• Precision voltage monitoring ensures accurate reset generation.

Advantages

• Wide supply voltage range allows compatibility with various systems.
• Multiple threshold voltage and timeout period options cater to diverse application requirements.
• Low-power operation extends battery life in portable devices.
• Precision voltage monitoring ensures reliable reset generation.
• Manual reset capability provides additional control.

Disadvantages

• Limited pin configuration options due to the DIP package.
• Not suitable for applications requiring extremely high voltage thresholds.
• May not be ideal for systems with strict power consumption constraints.

Working Principles

The TL7757IPK operates by continuously monitoring the supply voltage. When the voltage falls below the selected threshold, it triggers the reset output, indicating a power failure or unstable voltage condition. The timeout period determines how long the reset signal remains active after the voltage returns to normal. The manual reset input allows the user to manually initiate a reset if required.

Detailed Application Field Plans

The TL7757IPK is commonly used in various electronic systems where reliable voltage monitoring and reset generation are critical. Some typical application fields include:

1. Microcontrollers and Microprocessors: Ensures proper system initialization and prevents erratic behavior during power-up or voltage fluctuations.
2. Industrial Control Systems: Provides stable operation and protects sensitive components from voltage variations.
3. Automotive Electronics: Monitors the vehicle's electrical system to prevent malfunctions and ensure safe operation.
4. Power Supply Units: Guards against undervoltage conditions and facilitates controlled shutdowns during power outages.
5. Battery-Powered Devices: Maximizes battery life by efficiently managing power consumption and preventing deep discharge.

Detailed and Complete Alternative Models

1. TL7700IP: Similar functionality with a different pin configuration (SOIC package).
2. MAX823: Voltage supervisor IC with adjustable threshold voltage and watchdog timer feature.
3. LTC2937: Precision voltage monitor with programmable threshold levels and adjustable reset timeout.

These alternative models offer similar voltage monitoring and reset generation capabilities, but may have different package options, additional features, or specific advantages in certain applications.

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