TL7705BCDR

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Supervisor
• Characteristics: Low-power, Precision, Programmable Delay
• Package: SOIC-8
• Essence: Monolithic integrated circuit designed for voltage monitoring and reset generation
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 2.7V to 18V
• Operating Temperature Range: -40°C to +85°C
• Reset Threshold Voltage Options: 4.55V, 4.65V, 4.75V, 4.85V, 4.95V, 5.05V, 5.15V, 5.25V
• Programmable Reset Time Delay: 1ms, 20ms, 100ms, or 200ms
• Quiescent Current: 35µA (typical)

Detailed Pin Configuration

The TL7705BCDR is an SOIC-8 package with the following pin configuration:

1. GND: Ground
2. VCC: Positive Supply Voltage
3. RESET: Active-Low Reset Output
4. MR: Manual Reset Input
5. TH: Threshold Voltage Selection Input
6. CT: Capacitor Connection for Reset Time Delay
7. TRG: Trigger Input for Reset Generation
8. OUT: Power-On Reset Output

Functional Features

• Monitors the supply voltage and generates a reset signal when it falls below a specified threshold.
• Provides programmable delay options for the reset signal.
• Offers manual reset capability through the MR pin.
• Allows selection of different threshold voltages using the TH pin.
• Generates a power-on reset signal upon power-up.

Advantages and Disadvantages

Advantages

• Low-power consumption, making it suitable for battery-powered applications.
• Precision voltage monitoring ensures reliable system operation.
• Programmable reset delay allows customization based on specific requirements.
• Small form factor and easy integration into various circuit designs.

Disadvantages

• Limited threshold voltage options may not cover all application scenarios.
• Lack of built-in hysteresis may result in potential noise-related issues.

Working Principles

The TL7705BCDR operates by continuously monitoring the supply voltage using an internal voltage reference. When the voltage falls below the selected threshold, the IC generates a reset signal. The reset signal remains active until the supply voltage rises above the threshold and the programmable delay time elapses. The MR pin provides a manual reset option, allowing external control over the reset signal.

Detailed Application Field Plans

The TL7705BCDR finds applications in various fields, including:

1. Automotive Electronics: Ensuring proper functioning of critical systems by monitoring voltage levels and generating resets when necessary.
2. Industrial Control Systems: Providing reliable power-on reset functionality to ensure stable operation of control circuits.
3. Consumer Electronics: Enhancing system reliability by preventing erratic behavior caused by voltage fluctuations.
4. Medical Devices: Safeguarding patient safety by monitoring power supply integrity and initiating appropriate actions during voltage anomalies.

Detailed and Complete Alternative Models

1. TL7702ACD: Dual Voltage Supervisor with Adjustable Threshold
2. TL7709ACD: Triple Voltage Supervisor with Programmable Delay
3. MAX823LEUK+: Microprocessor Reset Circuit with Battery Backup Switchover
4. ADM708TARZ: Precision Voltage Monitor with Watchdog Timer

These alternative models offer similar functionality and can be considered as substitutes for the TL7705BCDR in different applications.

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