TL7757CLPRE3

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Supervisor

Characteristics: - Monitors the voltage level of a power supply - Generates a reset signal when the voltage falls below a specified threshold - Prevents erratic behavior or data corruption in electronic systems during power fluctuations

Package: SOP-8 (Small Outline Package)

Essence: The TL7757CLPRE3 is a voltage supervisor IC that ensures stable operation of electronic systems by monitoring the power supply voltage and generating a reset signal when it falls below a predetermined threshold.

Packaging/Quantity: The TL7757CLPRE3 is typically sold in reels containing 2500 units.

Specifications

• Supply Voltage Range: 2.5V to 18V
• Reset Threshold Voltage: Adjustable from 1.2V to 5V
• Reset Timeout Period: Fixed at 200ms
• Operating Temperature Range: -40°C to +85°C
• Quiescent Current: 35µA (typical)
• Output Type: Active Low, Push-Pull

Detailed Pin Configuration

The TL7757CLPRE3 is an 8-pin IC with the following pin configuration:

1. GND: Ground reference for the IC.
2. VCC: Positive power supply input.
3. MR: Manual reset input. When pulled low, it forces the reset output to go active.
4. RESET: Active-low reset output.
5. TH: Threshold voltage adjustment pin. Connect a resistor divider network to set the desired threshold voltage.
6. CT: Capacitor connection pin for reset timeout period adjustment.
7. NC: No connection. This pin is not internally connected and can be left unconnected.
8. OUT: Output pin. Provides a push-pull active-low reset signal.

Functional Features

• Monitors the power supply voltage continuously.
• Generates a reset signal when the voltage falls below the threshold set by the TH pin.
• The reset signal remains active for a fixed timeout period (200ms) after the voltage rises above the threshold.
• Provides a manual reset input (MR) to force the reset output to go active.
• Offers an adjustable threshold voltage using an external resistor divider network.

Advantages and Disadvantages

Advantages: - Ensures reliable operation of electronic systems during power fluctuations. - Adjustable threshold voltage allows flexibility in different applications. - Low quiescent current consumption helps conserve power. - Small package size enables space-saving designs.

Disadvantages: - Fixed reset timeout period may not be suitable for all applications. - Limited operating temperature range (-40°C to +85°C). - Requires additional external components (resistor divider, capacitor) for proper operation.

Working Principles

The TL7757CLPRE3 operates by comparing the power supply voltage with a threshold voltage set by the TH pin. When the power supply voltage falls below the threshold, the reset output goes active low, indicating a system reset. The reset output remains active for a fixed timeout period (200ms) after the voltage rises above the threshold. The reset signal can also be forced active by pulling the MR pin low.

Detailed Application Field Plans

The TL7757CLPRE3 is widely used in various electronic systems where stable operation is critical. Some common application fields include:

1. Microcontrollers and Microprocessors: Ensures reliable startup and proper functioning of these devices.
2. Industrial Control Systems: Prevents data corruption and erratic behavior during power fluctuations.
3. Automotive Electronics: Protects sensitive electronic components from voltage variations.
4. Telecommunications Equipment: Maintains system integrity during power disturbances.
5. Medical Devices: Ensures uninterrupted operation and patient safety.

Detailed and Complete Alternative Models

1. TL7757CLP: Similar to TL7757CLPRE3 but without the adjustable threshold voltage feature.
2. MAX705CPA: Voltage supervisor IC with adjustable threshold voltage and a wider operating temperature range (-40°C to +125°C).
3. ADM6315-26D4ARTZ-R7: Low-power voltage monitor with an adjustable threshold voltage and a wide supply voltage range (1.6V to 5.5V).

These alternative models offer similar functionality to the TL7757CLPRE3 and can be considered based on specific application requirements.

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