TC642VOA

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Supervisor
• Characteristics: Precision, Low Power Consumption
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: Monitors and controls voltage levels in electronic systems
• Packaging/Quantity: Available in reels of 2500 units

Specifications

• Supply Voltage: 2.7V to 5.5V
• Threshold Voltage Options: 1.8V, 2.5V, 3.0V, 3.3V, 5.0V
• Reset Timeout Period: Adjustable from 1ms to 6.4s
• Operating Temperature Range: -40°C to +85°C
• Output Type: Active-Low Push-Pull
• Quiescent Current: 10µA (typical)

Detailed Pin Configuration

The TC642VOA IC has the following pin configuration:

1. VDD: Supply Voltage
2. GND: Ground
3. MR: Manual Reset Input
4. RESET: Active-Low Reset Output
5. TH: Threshold Voltage Selection Input
6. TO: Reset Timeout Period Selection Input

Functional Features

• Monitors supply voltage and asserts reset when it falls below the threshold voltage.
• Provides an adjustable reset timeout period to prevent false resets during power-up or voltage fluctuations.
• Offers a manual reset input for immediate system reset.
• Active-low reset output signal indicates when the voltage is within the acceptable range.

Advantages and Disadvantages

Advantages: - High precision voltage monitoring ensures reliable system operation. - Low quiescent current minimizes power consumption. - Adjustable reset timeout period allows customization for specific applications. - Small package size enables space-efficient designs.

Disadvantages: - Limited threshold voltage options may not cater to all voltage level requirements. - Active-low reset output may not be compatible with systems requiring active-high reset signals.

Working Principles

The TC642VOA monitors the supply voltage using a precision voltage reference and comparator circuit. When the voltage falls below the selected threshold voltage, the reset output is asserted low, indicating a voltage fault. The reset remains active until the voltage rises above the threshold and the reset timeout period elapses. The manual reset input allows immediate system reset, overriding the voltage monitoring function.

Detailed Application Field Plans

The TC642VOA finds applications in various electronic systems where reliable voltage monitoring is critical. Some potential application fields include:

1. Power Supply Units (PSUs): Ensures stable power delivery by monitoring the input voltage and initiating corrective actions if necessary.
2. Microcontrollers: Protects sensitive microcontroller circuits from voltage fluctuations, preventing data corruption or hardware damage.
3. Industrial Control Systems: Monitors voltage levels in control panels, ensuring uninterrupted operation of critical machinery.
4. Automotive Electronics: Safeguards automotive electronic systems against voltage drops, enhancing overall reliability.
5. Battery-Powered Devices: Prevents excessive discharge of batteries by triggering a reset when the voltage reaches a critical level.

Detailed and Complete Alternative Models

1. TC54VC: Offers a wider range of threshold voltage options for greater flexibility.
2. MAX823: Provides additional features like a watchdog timer and a power-on reset delay.
3. ADM6316: Includes a power supply glitch immunity feature for enhanced stability in noisy environments.
4. MCP131: Features a low quiescent current and a wide operating temperature range suitable for harsh environments.

(Note: This list is not exhaustive and serves as an example of alternative models available in the market.)

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