TLC7725IDR

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Supervisor
• Characteristics: Low Power, Precision, Adjustable Threshold Voltage
• Package: SOIC-8
• Essence: The TLC7725IDR is a voltage supervisor IC designed to monitor the power supply voltage of electronic systems and provide a reset signal when the voltage falls below a certain threshold.
• Packaging/Quantity: The TLC7725IDR 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
• Threshold Voltage Options: Adjustable from 1.2V to 6V
• Reset Timeout Period: Fixed or Adjustable (from 100ms to 10s)
• Operating Temperature Range: -40°C to +85°C
• Quiescent Current: 20µA (typical)

Detailed Pin Configuration

The TLC7725IDR has a total of 8 pins arranged as follows:

```

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| | --| VDD GND |-- Pin 1: Ground (GND) --| RST OUT |-- Pin 2: Reset Output (OUT) --| TH TRG |-- Pin 3: Threshold Input (TH) --| MR VDD |-- Pin 4: Master Reset Input (MR) |___________| ```

Functional Features

• Monitors the power supply voltage and generates a reset signal when it falls below the threshold voltage.
• Provides an adjustable threshold voltage option, allowing customization for different applications.
• Offers a fixed or adjustable reset timeout period, ensuring proper system reset and stabilization time.
• Includes a master reset input for manual reset control.
• Low quiescent current consumption, making it suitable for battery-powered applications.

Advantages and Disadvantages

Advantages: - Wide supply voltage range allows compatibility with various systems. - Adjustable threshold voltage provides flexibility for different voltage monitoring requirements. - Low power consumption helps prolong battery life in portable devices. - Small package size (SOIC-8) enables space-efficient PCB design.

Disadvantages: - Lack of built-in hysteresis may result in potential oscillations near the threshold voltage. - Limited number of pins restricts the availability of additional features or functionalities.

Working Principles

The TLC7725IDR operates by comparing the monitored power supply voltage with the threshold voltage set by the TH pin. When the power supply voltage drops below the threshold, the reset output (OUT) is activated, indicating a system reset condition. The reset signal remains active until the power supply voltage rises above the threshold voltage or a master reset signal is applied to the MR pin.

Detailed Application Field Plans

The TLC7725IDR is commonly used in various electronic systems where reliable power supply monitoring is crucial. Some typical application fields include:

1. Microcontroller Systems: Ensures proper system initialization and prevents erratic behavior during power-up or voltage fluctuations.
2. Industrial Control Systems: Provides a reset signal to restart or reconfigure control circuits when the power supply voltage drops below a safe level.
3. Automotive Electronics: Monitors the vehicle's battery voltage and triggers a reset if it falls below a critical threshold, preventing damage to sensitive electronics.
4. Battery-Powered Devices: Protects battery-operated devices from operating at low voltages, preserving battery life and preventing data corruption.

Detailed and Complete Alternative Models

1. TL7705ACP: Similar voltage supervisor IC with fixed threshold voltage options and adjustable reset timeout period. Available in a PDIP-8 package.
2. MAX823: Voltage supervisor IC with adjustable threshold voltage and integrated hysteresis for improved noise immunity. Offered in a SOT-23 package.
3. ADM6315: Precision voltage monitor IC with adjustable threshold voltage and watchdog timer functionality. Packaged in a SOT-23-5.

These alternative models provide similar voltage monitoring capabilities but may offer additional features or different package options to suit specific application requirements.

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