TL7702BIDR

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 system operation by preventing erratic behavior during power-up and power-down sequences - Protects sensitive components from damage due to low voltage conditions

Package: SOIC (Small Outline Integrated Circuit)

Essence: The TL7702BIDR is an integrated circuit that serves as a voltage supervisor. It monitors the power supply voltage and generates a reset signal when the voltage drops below a specific threshold. This ensures the stability and reliability of electronic systems.

Packaging/Quantity: The TL7702BIDR is available in a small outline integrated circuit package (SOIC) and is typically sold in reels or tubes containing multiple 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
• Low Quiescent Current: 35µA (typical)
• Operating Temperature Range: -40°C to +125°C
• Output Type: Active-Low Push-Pull

Detailed Pin Configuration

The TL7702BIDR has a total of 8 pins:

1. VCC: Power supply input
2. GND: Ground reference
3. MR: Manual reset input
4. RESET: Active-low reset output
5. TH: Threshold selection input
6. CT: Capacitor connection for delay time adjustment
7. OUT: Output status indicator
8. NC: No connection (unused pin)

Functional Features

1. Voltage Monitoring: The TL7702BIDR continuously monitors the power supply voltage and compares it to the selected threshold voltage.
2. Reset Generation: When the monitored voltage falls below the threshold, the TL7702BIDR generates an active-low reset signal.
3. Manual Reset: The MR pin allows for manual reset control, overriding the automatic reset function.
4. Threshold Selection: The TH pin enables the selection of different threshold voltages to suit specific system requirements.
5. Delay Time Adjustment: The CT pin allows for adjustment of the delay time between the voltage falling below the threshold and the generation of the reset signal.
6. Output Status Indicator: The OUT pin provides an indication of the output status, allowing for monitoring of the reset signal.

Advantages and Disadvantages

Advantages: - Ensures proper system operation during power-up and power-down sequences - Protects sensitive components from low voltage conditions - Wide operating voltage range allows for versatile applications - Multiple threshold voltage options provide flexibility - Low quiescent current minimizes power consumption

Disadvantages: - Limited to voltage monitoring and reset generation functionality - Requires external capacitors for delay time adjustment

Working Principles

The TL7702BIDR operates by comparing the power supply voltage with the selected threshold voltage. When the voltage drops below the threshold, the integrated circuit triggers a reset signal. This signal can be used to initiate system initialization or recovery processes. The delay time between the voltage drop and the reset signal can be adjusted using an external capacitor connected to the CT pin.

Detailed Application Field Plans

The TL7702BIDR finds application in various fields where voltage monitoring and reset generation are critical for system stability and reliability. Some common application areas include:

1. Microcontroller Systems: Ensures proper initialization and protection of microcontrollers during power-up and power-down sequences.
2. Industrial Control Systems: Provides voltage supervision for critical components in industrial automation systems, preventing damage due to low voltage conditions.
3. Automotive Electronics: Monitors the power supply voltage in automotive electronic systems, ensuring safe operation and protecting sensitive components.
4. Power Supply Units: Used in power supply units to generate reset signals when the input voltage falls below a certain threshold, preventing erratic behavior.

Detailed and Complete Alternative Models

1. TL7700BIDR: Similar functionality with a different operating voltage range (2.7V to 10V).
2. TL7705BIDR: Voltage supervisor with adjustable threshold voltage options and a wider operating temperature range (-55°C to +125°C).
3. TL7712AIDR: Dual voltage supervisor with independent threshold voltage selection for each channel.
4. MAX823LEUK+: Voltage monitor with a push-pull output and adjustable reset threshold voltage.

These alternative models offer similar voltage monitoring and reset generation capabilities, but may have variations in operating parameters and additional features.

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