TL7757CDG4

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Supervisor
• Characteristics: Low-power, Precision, Reset Generation
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: Monolithic CMOS Circuitry
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 1.2V to 6.5V
• Operating Temperature Range: -40°C to +85°C
• Reset Threshold Voltage Options: 2.32V, 2.93V, 3.08V, 4.38V, 4.63V, 4.88V
• Reset Timeout Period Options: 140ms, 560ms, 1120ms, 2240ms
• Quiescent Current: 10µA (typical)

Detailed Pin Configuration

The TL7757CDG4 IC has a total of 8 pins arranged as follows:

```

---

| | --| VCC GND |-- Pin 1: Ground (GND) --| RESET OUT |-- Pin 2: Reset Output --| MR |-- Pin 3: Manual Reset Input --| THRESHOLD |-- Pin 4: Threshold Voltage Selection --| TIMEOUT |-- Pin 5: Reset Timeout Period Selection --| SENSE |-- Pin 6: Voltage Sense Input --| VCC |-- Pin 7: Supply Voltage (VCC) |___________| ```

Functional Features

• Monitors the supply voltage and generates a reset signal when it falls below a specified threshold.
• Provides a manual reset input for immediate system reset.
• Offers multiple options for threshold voltage and reset timeout period.
• Low quiescent current consumption for power-sensitive applications.

Advantages

• Wide supply voltage range allows compatibility with various systems.
• Precision monitoring ensures reliable system operation.
• Flexible threshold voltage and timeout period options cater to different requirements.
• Low-power design minimizes energy consumption.

Disadvantages

• Limited number of threshold voltage and timeout period options.
• Not suitable for high-temperature applications beyond the specified operating range.

Working Principles

The TL7757CDG4 operates by continuously monitoring the supply voltage using the SENSE pin. When the voltage drops below the selected threshold, the RESET OUT pin is activated, generating a reset signal. The threshold voltage and reset timeout period can be configured using external resistors connected to the THRESHOLD and TIMEOUT pins, respectively. Additionally, a manual reset input (MR) allows for immediate system reset when triggered.

Detailed Application Field Plans

The TL7757CDG4 is commonly used in various electronic systems where reliable voltage monitoring and reset generation are critical. Some application fields include:

1. Microcontrollers: Ensures proper initialization and safe operation of microcontroller-based systems.
2. Industrial Control Systems: Provides fault detection and system recovery capabilities in industrial automation.
3. Automotive Electronics: Monitors vehicle electrical systems and triggers resets in case of voltage fluctuations.
4. Power Supply Units: Safeguards sensitive electronic components by resetting the system during power supply abnormalities.
5. Medical Devices: Ensures uninterrupted operation and patient safety in medical equipment.

Detailed and Complete Alternative Models

1. TL7705ACP - Similar functionality with a different package (PDIP).
2. MAX809 - Voltage supervisor IC with adjustable threshold voltage.
3. ADM6315 - Precision voltage monitor with watchdog timer functionality.

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

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