TL7705BQDG4

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Supervisor

Characteristics: - Monitors the power supply voltage and provides a reset signal to the microcontroller or other digital devices when the voltage drops below a certain threshold. - Ensures reliable operation of the system by preventing erratic behavior during power-up and power-down sequences. - Can be used in various applications such as automotive, industrial, and consumer electronics.

Package: SOIC-8 (Small Outline Integrated Circuit)

Essence: The TL7705BQDG4 is a voltage supervisor IC that plays a crucial role in maintaining stable operation of electronic systems by monitoring the power supply voltage.

Packaging/Quantity: The TL7705BQDG4 is typically sold in reels containing 2500 units.

Specifications

• Supply Voltage Range: 2.7V to 18V
• Reset Threshold Voltage: 4.55V
• Reset Timeout Period: 200ms
• Quiescent Current: 40µA
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The TL7705BQDG4 has 8 pins arranged as follows:

```

---

| | --| VCC GND |-- Pin 1: Ground (GND) --| RESET OUT |-- Pin 2: Reset Output --| THRESHOLD |-- Pin 3: Threshold Input --| SENSE IN |-- Pin 4: Sense Input --| VCC |-- Pin 5: Power Supply (VCC) --| GND |-- Pin 6: Ground (GND) --| MR |-- Pin 7: Manual Reset Input |___________| ```

Functional Features

1. Voltage Monitoring: The TL7705BQDG4 continuously monitors the power supply voltage and compares it with the preset threshold voltage.
2. Reset Signal Generation: When the power supply voltage drops below the threshold, the TL7705BQDG4 generates a reset signal to initiate a system reset.
3. Manual Reset Input: The MR pin allows for manual resetting of the system by pulling it low.
4. Power Supply Filtering: The IC includes internal filtering to ensure stable operation even in noisy environments.

Advantages and Disadvantages

Advantages: - Provides reliable power-on reset functionality. - Low quiescent current consumption. - Wide operating voltage range. - Small package size for space-constrained applications.

Disadvantages: - Fixed reset threshold voltage may not be suitable for all applications. - Limited timeout period may not accommodate longer power-up sequences.

Working Principles

The TL7705BQDG4 operates by comparing the power supply voltage with the threshold voltage set by the external resistor connected to the THRESHOLD pin. When the power supply voltage falls below the threshold, the RESET OUT pin is pulled low, indicating a reset condition. The reset signal remains active until the power supply voltage rises above the threshold and a timeout period elapses.

Detailed Application Field Plans

The TL7705BQDG4 can be used in various applications, including:

1. Automotive: Ensuring proper functioning of electronic control units (ECUs) during vehicle start-up and power fluctuations.
2. Industrial: Providing reliable reset functionality for programmable logic controllers (PLCs), motor control systems, and other industrial automation equipment.
3. Consumer Electronics: Preventing erratic behavior in microcontrollers, digital cameras, and other battery-powered devices during power transitions.

Detailed and Complete Alternative Models

1. TL7700: Similar voltage supervisor IC with a lower reset threshold voltage of 4.35V.
2. TL7702: Dual voltage supervisor IC with two independent reset outputs.
3. TL7709: Voltage supervisor IC with adjustable threshold voltage.

These alternative models offer flexibility in choosing the appropriate reset threshold voltage and additional features based on specific application requirements.

Word count: 431 words