TLC7705IDG4

Product Overview

Category

TLC7705IDG4 belongs to the category of integrated circuits (ICs).

Use

This product is commonly used as a voltage supervisor and watchdog timer.

Characteristics

• Voltage supervisor with adjustable threshold voltage
• Watchdog timer with programmable timeout period
• Low supply current consumption
• Wide operating voltage range
• Small package size for space-constrained applications

Package

TLC7705IDG4 is available in a small 8-pin SOIC (Small Outline Integrated Circuit) package.

Essence

The essence of TLC7705IDG4 lies in its ability to monitor and control voltage levels, ensuring proper functioning of electronic systems.

Packaging/Quantity

This product is typically sold in reels containing a quantity of 2500 units per reel.

Specifications

• Supply Voltage Range: 2.7V to 18V
• Adjustable Threshold Voltage Range: 1.2V to 6V
• Watchdog Timeout Period Range: 3.2ms to 102.4s
• Operating Temperature Range: -40°C to +85°C
• Quiescent Current: 25µA (typical)

Detailed Pin Configuration

1. GND (Ground)
2. VDD (Supply Voltage)
3. RESET (Active-Low Reset Output)
4. MR (Manual Reset Input)
5. TH (Threshold Voltage Adjust)
6. CT (Watchdog Timeout Period Adjust)
7. TRIG (Watchdog Trigger Input)
8. OUT (Power-On Reset Output)

Functional Features

Voltage Supervisor

The TLC7705IDG4 acts as a voltage supervisor by continuously monitoring the supply voltage. It generates a reset signal when the voltage falls below a user-defined threshold, ensuring proper system operation.

Watchdog Timer

This IC incorporates a watchdog timer that detects system malfunctions or lock-ups. If the system fails to trigger the watchdog within a programmable timeout period, a reset signal is generated to restart the system.

Adjustable Threshold Voltage

The threshold voltage can be adjusted using the TH pin, allowing customization based on specific application requirements.

Programmable Timeout Period

The CT pin enables the user to program the timeout period of the watchdog timer, providing flexibility in system monitoring.

Advantages and Disadvantages

Advantages

• Flexible threshold voltage adjustment
• Wide operating voltage range
• Low quiescent current consumption
• Small package size for space-constrained applications

Disadvantages

• Limited number of pins for additional functionalities
• Not suitable for high-speed applications due to limited response time

Working Principles

The TLC7705IDG4 operates by comparing the supply voltage with the user-defined threshold voltage. When the supply voltage falls below this threshold, the RESET output is activated, indicating a low-voltage condition. Additionally, the watchdog timer continuously monitors the system's activity. If the system fails to trigger the watchdog within the programmed timeout period, the RESET output is activated, initiating a system reset.

Detailed Application Field Plans

The TLC7705IDG4 finds applications in various fields, including:

1. Automotive Electronics: Used for voltage monitoring in automotive systems, ensuring reliable operation.
2. Industrial Control Systems: Provides voltage supervision and watchdog functionality in industrial control applications, enhancing system reliability.
3. Consumer Electronics: Enables proper functioning of electronic devices by monitoring voltage levels and preventing malfunctions.
4. Medical Devices: Ensures the stability and safety of medical equipment by monitoring voltage and detecting system failures.

Detailed and Complete Alternative Models

1. TL7705ACP - Similar voltage supervisor and watchdog timer IC with adjustable threshold voltage and programmable timeout period. Available in an 8-pin PDIP (Plastic Dual In-Line Package).
2. MAX809 - Voltage supervisor IC with fixed threshold voltage and adjustable timeout period. Available in various package options, including SOT-23 and SC70.

(Note: The above alternative models are provided for reference and may have different specifications and features compared to TLC7705IDG4.)

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