TL7702ACDG4

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Supervisor

Characteristics: - Monitors the power supply voltage and provides a reset signal when the voltage falls below a predetermined threshold - Ensures proper operation of microcontrollers, microprocessors, and other digital systems by preventing them from operating in an undefined state during power-up or power-down sequences

Package: SOIC-8

Essence: The TL7702ACDG4 is a voltage supervisor IC that ensures reliable operation of digital systems by monitoring the power supply voltage.

Packaging/Quantity: The TL7702ACDG4 is available in a standard SOIC-8 package. It is typically sold in reels of 2500 units.

Specifications

• Supply Voltage Range: 2.7V to 18V
• Reset Threshold Voltage Options: 4.55V, 4.65V, 4.75V, 4.85V, 4.95V, 5.05V, 5.15V, 5.25V
• Reset Timeout Period: 200ms (min)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The TL7702ACDG4 has the following pin configuration:

____ VCC |1 8| GND RST |2 7| RESET GND |3 6| THRESHOLD |4 5| ------

Functional Features

1. Voltage Monitoring: The TL7702ACDG4 continuously monitors the power supply voltage.
2. Reset Signal Generation: When the voltage falls below the preset threshold, the TL7702ACDG4 generates a reset signal.
3. Adjustable Threshold: The threshold voltage can be set to one of the available options to suit different system requirements.
4. Reset Timeout: The reset signal remains active for a minimum timeout period of 200ms after the voltage rises above the threshold.

Advantages and Disadvantages

Advantages: - Ensures reliable operation of digital systems during power-up and power-down sequences - Adjustable threshold voltage for flexibility in different applications - Low power consumption - Small form factor package

Disadvantages: - Limited number of threshold voltage options - Single-channel voltage monitoring (not suitable for multi-voltage systems)

Working Principles

The TL7702ACDG4 operates by comparing the supply voltage with the preset threshold voltage. When the supply voltage falls below the threshold, the internal circuitry generates a reset signal. This signal remains active for a minimum timeout period even if the voltage rises above the threshold. This ensures that the digital system is held in a known state during power transitions.

Application Field Plans

The TL7702ACDG4 is widely used in various applications where reliable voltage monitoring and reset generation are critical. Some common application fields include:

1. Microcontrollers and Microprocessors: The TL7702ACDG4 is commonly used in microcontroller-based systems to ensure proper initialization and safe shutdown during power-up and power-down sequences.
2. Embedded Systems: It finds applications in embedded systems where stable power supply voltage is crucial for reliable operation.
3. Industrial Control Systems: The TL7702ACDG4 is utilized in industrial control systems to prevent erratic behavior during power fluctuations.
4. Automotive Electronics: It is employed in automotive electronics to monitor the vehicle's power supply and generate reset signals when necessary.

Alternative Models

1. TL7705ACD: Similar functionality with adjustable threshold voltage options.
2. MAX823LCPA+: Voltage supervisor IC with adjustable threshold and additional features like manual reset input.
3. ADM6315-26D2ARTZ-R7: Microprocessor supervisory circuit with adjustable threshold voltage and watchdog timer functionality.

These alternative models provide similar voltage monitoring and reset generation capabilities, offering flexibility for different application requirements.

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