TL7757CLPE3

Product Overview

• Category: Integrated Circuit
• Use: Voltage Supervisor
• Characteristics: Low Power, Precision Monitoring, Adjustable Thresholds
• Package: 8-Pin PDIP (Plastic Dual In-Line Package)
• Essence: Monitors voltage levels and provides reset signals to microprocessors and other digital systems.
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 1.2V to 5.5V
• Threshold Voltage Options: 2.32V, 2.62V, 2.93V, 3.08V, 4.63V
• Reset Timeout Period: 140ms (typical)
• Operating Temperature Range: -40°C to +85°C
• Quiescent Current: 10µA (typical)

Pin Configuration

The TL7757CLPE3 is an 8-pin integrated circuit with the following pin configuration:

1. GND (Ground)
2. VCC (Supply Voltage)
3. MR (Manual Reset)
4. RESET (Reset Output)
5. TH (Threshold Input)
6. TR (Reset Timeout)
7. CT (Capacitor Terminal)
8. NC (No Connection)

Functional Features

• Voltage Monitoring: The TL7757CLPE3 continuously monitors the input voltage and compares it to the threshold voltage set by the TH pin.
• Reset Generation: When the monitored voltage drops below the threshold voltage, the TL7757CLPE3 asserts the RESET pin, providing a reset signal to the connected microprocessor or digital system.
• Adjustable Thresholds: The TH pin allows for the selection of different threshold voltages, providing flexibility in monitoring various voltage levels.
• Reset Timeout: The TR pin sets the reset timeout period, ensuring that the RESET signal remains asserted for a specific duration after the voltage rises above the threshold.

Advantages and Disadvantages

Advantages: - Low power consumption - Precision voltage monitoring - Adjustable threshold options - Wide operating temperature range

Disadvantages: - Limited number of threshold voltage options - No built-in hysteresis

Working Principles

The TL7757CLPE3 operates by comparing the input voltage with the selected threshold voltage. When the input voltage falls below the threshold, the internal circuitry asserts the RESET pin, generating a reset signal. The reset signal remains active for the duration set by the reset timeout period. Once the input voltage rises above the threshold, the RESET pin is deasserted.

Detailed Application Field Plans

The TL7757CLPE3 is commonly used in various applications where reliable voltage monitoring and reset generation are required. Some typical application fields include:

1. Microcontroller Systems: Ensuring proper initialization and safe operation of microcontrollers.
2. Industrial Control Systems: Providing fault detection and system recovery in industrial automation.
3. Power Supply Units: Protecting sensitive electronic components from voltage fluctuations.
4. Automotive Electronics: Monitoring critical voltage levels in automotive systems.
5. Battery-Powered Devices: Preventing damage to batteries by monitoring voltage levels.

Detailed and Complete Alternative Models

1. TL7759CLPE3: Similar to TL7757CLPE3 but with additional features such as adjustable reset timeout and hysteresis.
2. TL7700CP: Voltage supervisor with fixed threshold voltage and push-pull output.
3. MAX809: Microprocessor supervisory circuit with adjustable threshold voltage and reset timeout.

(Note: This list is not exhaustive and there are several other alternative models available in the market.)

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