TL7759CPW

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Supervisor
• Characteristics: Precision, Low Power Consumption, Wide Supply Voltage Range
• Package: 20-pin TSSOP (Thin Shrink Small Outline Package)
• Essence: Monolithic CMOS Voltage Supervisor with Power-Fail Comparator
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

The TL7759CPW is a voltage supervisor IC designed to monitor the power supply voltage of a system. It provides a reset signal to the microcontroller or other digital devices when the supply voltage falls below a certain threshold. The key specifications of TL7759CPW are as follows:

• Supply Voltage Range: 1.2V to 6.5V
• Reset Threshold Voltage Options: 4.65V, 4.40V, 4.00V, 3.08V, 2.93V, 2.63V, 2.32V, 1.75V
• Reset Timeout Period: Adjustable from 1ms to 640ms
• Quiescent Current: 25µA (typical)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The TL7759CPW has a 20-pin TSSOP package with the following pin configuration:

1. VCC: Positive Supply Voltage
2. GND: Ground
3. MR: Manual Reset Input
4. RESET: Reset Output
5. GND: Ground
6. VCC: Positive Supply Voltage
7. VCC: Positive Supply Voltage
8. GND: Ground
9. GND: Ground
10. GND: Ground
11. GND: Ground
12. GND: Ground
13. GND: Ground
14. GND: Ground
15. GND: Ground
16. GND: Ground
17. GND: Ground
18. GND: Ground
19. GND: Ground
20. VCC: Positive Supply Voltage

Functional Features

The TL7759CPW offers the following functional features:

1. Voltage Monitoring: Monitors the supply voltage and generates a reset signal when it falls below the specified threshold.
2. Manual Reset Input: Allows for manual resetting of the system by asserting the MR pin.
3. Adjustable Reset Timeout: The reset timeout period can be adjusted to meet specific system requirements.
4. Power-Fail Comparator: Detects power failures and triggers a reset signal to prevent improper operation.
5. Precision: Provides accurate voltage monitoring with tight voltage thresholds.

Advantages and Disadvantages

Advantages of TL7759CPW:

• Wide supply voltage range allows for compatibility with various systems.
• Low quiescent current minimizes power consumption.
• Adjustable reset timeout period provides flexibility in system design.
• Power-fail comparator ensures reliable operation during power fluctuations.
• Precision voltage monitoring enhances system reliability.

Disadvantages of TL7759CPW:

• Limited number of available reset threshold voltage options.
• Only available in a 20-pin TSSOP package, which may not be suitable for all applications.

Working Principles

The TL7759CPW operates by continuously monitoring the supply voltage using an internal voltage reference. When the voltage falls below the specified threshold, the reset output is asserted, indicating a power failure or low voltage condition. The reset signal remains active until the supply voltage rises above the threshold and the reset timeout period elapses.

Application Field Plans

The TL7759CPW is commonly used in various electronic systems where reliable voltage monitoring is critical. Some application field plans include:

1. Microcontroller Systems: Provides a reset signal to the microcontroller when the supply voltage drops, ensuring proper system initialization.
2. Industrial Control Systems: Monitors power supply voltage in industrial control systems to prevent improper operation during voltage fluctuations.
3. Automotive Electronics: Ensures reliable operation of automotive electronic systems by detecting power failures and triggering appropriate actions.
4. Telecommunication Equipment: Monitors power supply voltage in telecommunication equipment to maintain uninterrupted operation.

Alternative Models

If TL7759CPW does not meet specific requirements, alternative models with similar functionality are available. Some popular alternatives include:

1. MAX809: Precision Voltage Supervisors with Adjustable Reset Timeout and Multiple Threshold Options.
2. ADM1232: Microprocessor Supervisory Circuits with Manual Reset Input and Adjustable Reset Timeout.
3. TPS3808: Ultra-Low Quiescent Current Voltage Supervisors with Wide Supply Voltage Range and Power-Fail Comparator.

These alternative models offer comparable features and can be considered as substitutes for TL7759CPW in different applications.

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