TL7702BIP

Product Overview

Category: Integrated Circuit (IC)

Use: The TL7702BIP is a voltage supervisor and reset generator IC. It is commonly used in electronic systems to monitor the power supply voltage and generate a reset signal when the voltage falls below a certain threshold.

Characteristics: - Monitors power supply voltage - Generates reset signal - Low power consumption - Wide operating voltage range - Small package size

Package: The TL7702BIP is available in a 8-pin plastic dual in-line package (PDIP).

Essence: The essence of TL7702BIP lies in its ability to ensure proper functioning of electronic systems by monitoring the power supply voltage and generating a reset signal when necessary.

Packaging/Quantity: The TL7702BIP is typically sold in reels or tubes, with a quantity of 250 units per reel/tube.

Specifications

• Supply Voltage Range: 2.7V to 18V
• Reset Threshold Voltage: Adjustable from 1.2V to 5V
• Reset Timeout Period: Adjustable from 1ms to 640ms
• Operating Temperature Range: -40°C to +85°C
• Quiescent Current: 50µA (typical)

Pin Configuration

The TL7702BIP has 8 pins, which are assigned specific functions:

1. VCC: Power supply input
2. GND: Ground reference
3. MR: Manual reset input
4. RESET: Reset output
5. TH: Threshold adjust input
6. CT: Timeout adjust input
7. OUT: Output status indicator
8. NC: No connection

Functional Features

• Voltage Monitoring: The TL7702BIP continuously monitors the power supply voltage and compares it with the user-adjustable threshold voltage.
• Reset Generation: When the power supply voltage falls below the threshold voltage, the TL7702BIP generates a reset signal to initiate a system reset.
• Adjustable Threshold and Timeout: The threshold voltage and timeout period can be adjusted using external resistors and capacitors, allowing customization for different applications.
• Output Status Indicator: The OUT pin provides an indication of the output status, allowing monitoring of the reset signal.

Advantages and Disadvantages

Advantages: - Reliable voltage monitoring and reset generation - Low power consumption - Wide operating voltage range - Adjustable threshold and timeout - Compact package size

Disadvantages: - Limited number of pins for additional functionalities - Requires external components for threshold and timeout adjustment

Working Principles

The TL7702BIP operates by comparing the power supply voltage with the user-adjustable threshold voltage. If the power supply voltage drops below the threshold voltage, indicating a potential power failure or instability, the TL7702BIP generates a reset signal. This reset signal can be used to restart the system or trigger specific actions to ensure proper functioning.

The threshold voltage and timeout period can be adjusted using external resistors and capacitors connected to the TH and CT pins, respectively. This allows flexibility in setting the desired voltage level and timeout duration based on the requirements of the application.

Detailed Application Field Plans

The TL7702BIP finds applications in various electronic systems where reliable voltage monitoring and reset generation are crucial. Some common application fields include:

1. Microcontrollers and Microprocessors: Ensuring proper system initialization and preventing erratic behavior during power fluctuations.
2. Industrial Control Systems: Providing stable operation and protection against power supply abnormalities.
3. Automotive Electronics: Monitoring vehicle power supply and generating resets to prevent malfunctions.
4. Power Management Systems: Safeguarding sensitive components from voltage variations and ensuring smooth operation.

Detailed and Complete Alternative Models

1. TL7700IP: Similar functionality with a different package (8-pin PDIP).
2. TL7705ACP: Voltage supervisor IC with additional features like watchdog timer and adjustable threshold.
3. MAX823LEUK+: Low-power voltage monitor IC with adjustable threshold and reset timeout.

These alternative models offer similar voltage monitoring and reset generation capabilities, but may have different specifications, package options, or additional features to suit specific application requirements.

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