TL7757ID

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Supervisor
• Characteristics: Low-power, Precision, Adjustable Threshold
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: Monitors and controls the voltage level of a system
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 1.2V to 6V
• Threshold Voltage Options: Adjustable from 0.4V to 5V in 50mV steps
• Operating Temperature Range: -40°C to +85°C
• Quiescent Current: 10µA (typical)
• Output Type: Active-Low, Open Drain
• Reset Timeout Period: 200ms (minimum)

Detailed Pin Configuration

The TL7757ID has a total of 8 pins:

1. GND: Ground reference for the IC.
2. VCC: Positive supply voltage input.
3. MR: Master Reset pin, active-low input.
4. TH: Threshold pin for setting the voltage threshold.
5. TR: Trigger pin for monitoring the voltage level.
6. RESET: Active-low output indicating a reset condition.
7. RESETB: Complementary output to RESET.
8. VREF: Reference voltage output.

Functional Features

• Monitors the voltage level and generates a reset signal when it falls below the set threshold.
• Adjustable threshold voltage allows customization for different applications.
• Open-drain output provides flexibility in connecting to other devices.
• Low quiescent current ensures minimal power consumption.
• Reset timeout period prevents false resets due to temporary voltage fluctuations.

Advantages and Disadvantages

Advantages: - Precise voltage monitoring for reliable system operation. - Adjustable threshold allows flexibility in different voltage level requirements. - Low-power consumption for energy-efficient designs. - Open-drain output simplifies interfacing with other devices.

Disadvantages: - Limited supply voltage range (1.2V to 6V). - Fixed reset timeout period may not be suitable for all applications.

Working Principles

The TL7757ID operates by comparing the voltage at the TH pin with the internally set threshold voltage. When the monitored voltage falls below the threshold, the RESET output is activated, indicating a reset condition. The reset remains active until the voltage rises above the threshold or the reset timeout period elapses.

Detailed Application Field Plans

The TL7757ID is commonly used in various electronic systems where reliable voltage monitoring and system reset functionality are required. Some application fields include:

1. Microcontrollers: Ensures proper operation by resetting the system when the supply voltage drops below a certain level.
2. Power Supplies: Monitors the output voltage and triggers a reset if it falls outside the acceptable range.
3. Industrial Control Systems: Provides voltage supervision to prevent damage or malfunctioning of critical components.
4. Automotive Electronics: Ensures stable operation of vehicle systems by monitoring battery voltage and initiating resets if necessary.

Detailed and Complete Alternative Models

1. TL7759: Similar to TL7757ID but with adjustable threshold voltage options in 100mV steps.
2. TL7705: Voltage supervisor IC with fixed threshold voltage options.
3. MAX809: Microprocessor supervisory circuit with adjustable threshold and reset timeout features.

These alternative models offer similar functionality and can be considered based on specific application requirements.

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