TL7705ACDE4

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Supervisor

Characteristics: - Monitors the power supply voltage and provides a reset signal when the voltage drops below a specified threshold - Ensures proper operation of microcontrollers, microprocessors, and other digital systems - Prevents data corruption and system malfunction during power-up and power-down sequences

Package: SOIC-8 (Small Outline Integrated Circuit)

Essence: The TL7705ACDE4 is a voltage supervisor IC that ensures reliable operation of digital systems by monitoring the power supply voltage and generating a reset signal when the voltage falls below a predetermined level.

Packaging/Quantity: The TL7705ACDE4 is typically sold in reels or tubes containing 250 units per package.

Specifications

• Supply Voltage Range: 2.7V to 18V
• Reset Threshold Voltage Options: 4.55V, 4.65V, 4.75V, 4.85V, 4.95V, 5.05V, 5.15V, 5.25V
• Reset Timeout Period: 200ms (min)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The TL7705ACDE4 has a total of 8 pins arranged as follows:

____ VCC | | GND RST | | OUT GND | | SENSE ----

• VCC: Power supply input pin
• GND: Ground reference pin
• RST: Reset output pin
• OUT: Open-drain output pin for power-fail indication
• SENSE: Voltage sense input pin

Functional Features

1. Voltage Monitoring: The TL7705ACDE4 continuously monitors the power supply voltage and compares it with the preset threshold voltage.
2. Reset Generation: When the power supply voltage drops below the threshold, the TL7705ACDE4 generates a reset signal to initiate a system reset.
3. Power-Fail Indication: The open-drain output pin (OUT) provides a power-fail indication signal that can be used for external monitoring or control purposes.
4. Adjustable Threshold Voltage: The TL7705ACDE4 offers multiple options for the reset threshold voltage, allowing flexibility in system design.

Advantages and Disadvantages

Advantages: - Ensures reliable operation of digital systems during power-up and power-down sequences - Adjustable threshold voltage for customization - Power-fail indication for external monitoring - Wide operating temperature range

Disadvantages: - Limited number of available threshold voltage options

Working Principles

The TL7705ACDE4 operates by comparing the power supply voltage with the selected threshold voltage. If the voltage falls below the threshold, the IC generates a reset signal, which can be used to reset the connected microcontroller or other digital system. The power-fail indication pin provides an open-drain output that can be monitored externally to detect power failures.

Application Field Plans

The TL7705ACDE4 is commonly used in various applications where reliable voltage monitoring and reset generation are critical. Some typical application fields include:

1. Microcontrollers: Ensures proper operation of microcontrollers during power transitions, preventing data corruption and ensuring system stability.
2. Microprocessors: Provides reliable reset signals to microprocessors, allowing them to start up correctly and avoid system malfunctions.
3. Digital Systems: Used in various digital systems, such as industrial control systems, automotive electronics, and consumer electronics, to ensure stable operation and prevent data loss.

Alternative Models

1. TL7702ACD: Similar voltage supervisor IC with a different pin configuration (SOIC-8 package)
2. TL7700ACP: Voltage supervisor IC with adjustable threshold voltage options (PDIP-8 package)
3. TL7709ACP: Voltage supervisor IC with additional power-fail detection features (PDIP-8 package)

These alternative models offer similar functionality and can be considered as substitutes for the TL7705ACDE4 depending on specific requirements.

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