TLC7725QDG4

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Supervisor
• Characteristics: Low Power, Precision Monitoring, Adjustable Threshold Voltage
• Package: SOIC-8
• Essence: Monitors voltage levels and provides a reset signal when the voltage falls below a certain threshold.
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 1.2V to 6V
• Threshold Voltage Options: Adjustable or Fixed
• Reset Timeout Period: Adjustable or Fixed
• Operating Temperature Range: -40°C to +125°C
• Quiescent Current: 10µA (typical)

Detailed Pin Configuration

The TLC7725QDG4 has a total of 8 pins arranged as follows:

1. GND: Ground pin
2. VDD: Positive supply voltage pin
3. MR: Master Reset input pin
4. RESET: Active-low reset output pin
5. TH: Threshold voltage selection pin
6. CT: Capacitor connection pin for reset timeout period adjustment
7. OUT: Open-drain reset output pin
8. NC: No Connection pin

Functional Features

• Monitors supply voltage and generates a reset signal when it drops below the threshold voltage.
• Provides an adjustable threshold voltage option for flexibility in different applications.
• Offers an adjustable or fixed reset timeout period to control the duration of the reset signal.
• Low quiescent current consumption makes it suitable for battery-powered devices.
• Open-drain reset output allows easy interfacing with other circuitry.

Advantages and Disadvantages

Advantages: - Precise monitoring of voltage levels ensures reliable system operation. - Adjustable threshold voltage and reset timeout period provide customization options. - Low power consumption extends battery life in portable devices. - Small package size (SOIC-8) allows for space-efficient designs.

Disadvantages: - Limited to voltage monitoring and reset functionality, not suitable for complex applications requiring additional features. - Requires an external capacitor for reset timeout adjustment, adding extra components to the circuit.

Working Principles

The TLC7725QDG4 operates by comparing the supply voltage with a threshold voltage set by the TH pin. When the supply voltage drops below the threshold, the internal circuitry triggers a reset signal. The reset signal remains active until the supply voltage rises above the threshold or the reset timeout period elapses. The MR pin can be used to force an immediate reset regardless of the voltage level.

Detailed Application Field Plans

The TLC7725QDG4 is commonly used in various applications where voltage monitoring and system reset are critical. Some typical application fields include:

1. Power Supply Units (PSUs): Ensures stable operation by monitoring the input voltage and resetting the system if it falls below a safe threshold.
2. Microcontrollers and Microprocessors: Protects sensitive digital circuits from erratic behavior caused by insufficient power supply voltage.
3. Industrial Control Systems: Monitors power supply integrity in control systems to prevent malfunctions and ensure reliable operation.
4. Automotive Electronics: Provides voltage supervision in automotive applications, such as engine control units and safety systems, to maintain proper functionality.
5. Battery-Powered Devices: Guards against undervoltage conditions in portable devices, preventing data loss or damage due to sudden power failures.

Detailed and Complete Alternative Models

1. TL7705ACP: Fixed threshold voltage supervisor with a push-pull output.
2. MAX823: Low-power microprocessor reset circuit with adjustable threshold voltage.
3. ADM708: Precision voltage monitor with adjustable reset timeout period and watchdog timer functionality.
4. MCP101: Voltage supervisor with a wide supply voltage range and adjustable threshold voltage.
5. MAX809: Microprocessor reset circuit with a fixed threshold voltage and a wide operating temperature range.

These alternative models offer similar voltage monitoring and reset capabilities, but each has its own unique features and specifications to suit different application requirements.

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