TL7709ACPG4

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Supervisor

Characteristics: - Monitors the power supply voltage of a system - Generates a reset signal when the voltage falls below a specified threshold - Prevents erratic behavior or data corruption during power-up and power-down sequences

Package: CPG (Ceramic Dual-In-Line Package)

Essence: The TL7709ACPG4 is a voltage supervisor IC that ensures stable operation of electronic systems by monitoring the power supply voltage and generating a reset signal when necessary.

Packaging/Quantity: The TL7709ACPG4 is typically sold in reels containing 2,000 units per reel.

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 TL7709ACPG4 has eight pins arranged as follows:

```

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

Functional Features

1. Voltage Monitoring: The TL7709ACPG4 continuously monitors the power supply voltage to ensure it remains within the specified range.
2. Reset Signal Generation: When the voltage falls below the threshold level set by the THRESHOLD pin, the TL7709ACPG4 generates a reset signal on the RESET OUT pin.
3. Manual Reset: The MR pin allows for manual resetting of the system, overriding the automatic reset function.
4. Power-On Reset Delay: The TL7709ACPG4 provides a delay of approximately 200ms after power is applied before generating the reset signal, allowing the system to stabilize.

Advantages and Disadvantages

Advantages: - Ensures reliable system operation during power-up and power-down sequences - Wide operating voltage range allows for compatibility with various systems - Manual reset capability provides flexibility in system control

Disadvantages: - Limited number of available threshold voltage options - Not suitable for applications requiring precise voltage monitoring

Working Principles

The TL7709ACPG4 operates by comparing the power supply voltage with the threshold voltage set by the THRESHOLD pin. If the power supply voltage falls below the threshold, the internal circuitry triggers the generation of a reset signal. This signal remains active until the power supply voltage rises above the threshold level again.

Detailed Application Field Plans

The TL7709ACPG4 is commonly used in various electronic systems where stable operation is critical, such as: - Microcontrollers and microprocessors - Industrial control systems - Automotive electronics - Power management circuits - Communication equipment

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the TL7709ACPG4 include: - MAX809: Voltage Supervisors from Maxim Integrated - ADM708: Voltage Monitors from Analog Devices - MCP131: Voltage Supervisors from Microchip Technology

These alternative models can be considered based on specific application requirements and availability.

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