TL7702AIDR

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Supervisor

Characteristics: - Monitors the power supply voltage of a system - Generates a reset signal when the voltage falls below a specified threshold - Prevents erratic behavior or data corruption during power-up and power-down sequences

Package: SOIC-8

Essence: The TL7702AIDR is a voltage supervisor IC that ensures stable operation of electronic systems by monitoring the power supply voltage and generating a reset signal when necessary.

Packaging/Quantity: The TL7702AIDR is typically sold in reels of 2500 units.

Specifications

• Supply Voltage Range: 2.7V to 18V
• Reset Threshold Voltage Options: 4.55V, 4.40V, 4.65V, 4.75V, 4.85V, 4.95V, 5.05V, 5.15V
• Reset Timeout Period: 200ms (min)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The TL7702AIDR has 8 pins arranged as follows:

```

---

| | --| VCC GND |-- Pin 1: Ground (GND) --| RESET OUT |-- Pin 2: Reset Output (RESET OUT) --| THRESHOLD |-- Pin 3: Threshold Voltage Selection (THRESHOLD) --| MR |-- Pin 4: Manual Reset Input (MR) --| TR |-- Pin 5: Trigger Input (TR) --| CT |-- Pin 6: Capacitor Connection (CT) --| RT |-- Pin 7: Resistor Connection (RT) --| VCC |-- Pin 8: Positive Power Supply (VCC) |___________| ```

Functional Features

• Monitors the power supply voltage continuously
• Generates a reset signal when the voltage falls below the threshold
• Reset output remains active until the voltage rises above the threshold and a timeout period elapses
• Provides manual reset capability through the MR pin
• Trigger input (TR) allows for external control of the reset function

Advantages and Disadvantages

Advantages: - Ensures reliable system operation during power-up and power-down sequences - Easy integration into various electronic systems - Wide operating voltage range - Multiple threshold voltage options for flexibility

Disadvantages: - Limited reset timeout period may not be suitable for all applications - Requires external components (capacitor and resistor) for proper operation

Working Principles

The TL7702AIDR operates by comparing the power supply voltage with a user-selectable threshold voltage. When the voltage falls below the threshold, the reset output is activated, indicating that the system should be held in a reset state. The reset output remains active until the voltage rises above the threshold and a timeout period elapses, ensuring stable operation during power-up and power-down sequences.

Application Field Plans

The TL7702AIDR finds applications in various electronic systems where stable operation is critical during power transitions. Some common application fields include: - Microcontrollers and microprocessors - Industrial control systems - Automotive electronics - Communication equipment - Power management circuits

Alternative Models

Some alternative models to the TL7702AIDR include: - MAX809: Voltage supervisor with adjustable reset threshold and timeout period - ADM708: Microprocessor supervisory circuit with watchdog timer - TPS3808: Precision voltage supervisor with programmable delay time

These alternative models offer similar functionality and can be considered based on specific application requirements.

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