TLC7701QDR

Product Overview

Category: Integrated Circuit (IC)

Use: The TLC7701QDR is a voltage supervisor and reset generator IC. It is designed to monitor the power supply voltage of electronic systems and provide a reset signal when the voltage falls below a certain threshold.

Characteristics: - Monitors power supply voltage - Generates reset signal - Low power consumption - Wide operating voltage range - Small package size

Package: SOIC-8 (Small Outline Integrated Circuit), also available in other package options

Essence: The TLC7701QDR is an essential component for ensuring reliable operation of electronic systems by monitoring the power supply voltage and generating a reset signal when necessary.

Packaging/Quantity: The TLC7701QDR is typically sold in reels or tubes containing a specified quantity of ICs, such as 250 or 1000 units per reel/tube.

Specifications

• Operating Voltage Range: 2.7V to 18V
• Reset Threshold Voltage: Adjustable through external resistors
• Reset Timeout Period: Fixed or adjustable through external capacitor
• Quiescent Current: Typically 20µA
• Output Type: Active-low push-pull or open-drain
• Temperature Range: -40°C to +125°C

Detailed Pin Configuration

The TLC7701QDR has 8 pins arranged as follows:

```

---

| | --| VDD GND |-- Pin 1: Ground (GND) --| RESET OUT |-- Pin 2: Reset Output --| THRESHOLD |-- Pin 3: Threshold Input --| TIMEOUT |-- Pin 4: Timeout Input --| MR |-- Pin 5: Master Reset Input --| VDD |-- Pin 6: Power Supply Voltage (VDD) --| RESET IN |-- Pin 7: Reset Input |___________| ```

Functional Features

1. Voltage Monitoring: The TLC7701QDR continuously monitors the power supply voltage and compares it with the threshold voltage set by external resistors.
2. Reset Generation: When the power supply voltage falls below the threshold, the TLC7701QDR generates a reset signal on the RESET OUT pin.
3. Timeout Function: The IC includes a timeout input that allows the user to configure a fixed or adjustable reset timeout period using an external capacitor.
4. Master Reset: The MR (Master Reset) input provides a way to force a reset regardless of the monitored voltage level.
5. Output Options: The TLC7701QDR offers both active-low push-pull and open-drain output options for flexibility in system design.

Advantages and Disadvantages

Advantages: - Wide operating voltage range makes it suitable for various applications - Low quiescent current minimizes power consumption - Small package size saves board space - Adjustable reset threshold and timeout period provide customization options

Disadvantages: - Lack of built-in hysteresis may require additional external components for noise immunity - Limited number of output options compared to some other voltage supervisor ICs

Working Principles

The TLC7701QDR operates by comparing the power supply voltage with a threshold voltage set by external resistors. When the power supply voltage drops below the threshold, the IC triggers a reset signal. The timeout function allows the user to define a specific reset timeout period using an external capacitor. The master reset input provides a way to force a reset regardless of the monitored voltage level.

Detailed Application Field Plans

The TLC7701QDR is widely used in various electronic systems where reliable power supply monitoring and reset generation are critical. Some application fields include:

1. Microcontrollers and Microprocessors: The IC ensures proper initialization and reliable operation of microcontrollers and microprocessors by providing a reset signal when the power supply voltage is insufficient.
2. Industrial Control Systems: In industrial control systems, the TLC7701QDR helps maintain system integrity by monitoring the power supply voltage and initiating a reset if necessary.
3. Automotive Electronics: The IC plays a vital role in automotive electronics, ensuring stable operation of critical components such as engine control units (ECUs) and safety systems.
4. Telecommunications Equipment: Telecommunication devices rely on the TLC7701QDR to monitor power supply voltage and initiate a reset if the voltage drops below the specified threshold.
5. Consumer Electronics: From smart home devices to portable gadgets, the IC is used in various consumer electronics applications to ensure reliable operation and prevent data corruption.

Detailed and Complete Alternative Models

1. MAX809: A voltage supervisor IC with similar features and package options.
2. ADM6320: Another voltage supervisor IC offering adjustable reset threshold and timeout period.
3. MCP101: Low-power voltage supervisor IC with additional hysteresis