MAX708TCUA

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Monitor
• Characteristics:
  • Monitors the voltage level of a power supply
  • Provides a reset signal when the voltage falls below a specified threshold
  • Low-power consumption
• Package: TSSOP-8
• Essence: Voltage monitoring and reset generation
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 1.0V to 5.5V
• Threshold Voltage Options: 2.63V, 3.08V, 4.38V
• Reset Timeout Period: 140ms (typical)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The MAX708TCUA has a total of 8 pins arranged as follows:

```

---

| | --| VCC GND |-- Pin 1: Ground (GND) --| MR RST |-- Pin 2: Reset Output (RST) --| TH OUT |-- Pin 3: Voltage Threshold Input (TH) --| CAP GND |-- Pin 4: Ground (GND) --| GND VCC |-- Pin 5: Supply Voltage (VCC) --| GND GND |-- Pin 6: Ground (GND) --| GND GND |-- Pin 7: Ground (GND) --| GND GND |-- Pin 8: Ground (GND) |___________| ```

Functional Features

• Monitors the voltage level of the power supply continuously
• Generates a reset signal when the voltage falls below the specified threshold
• Provides a debounced reset output to prevent false triggering
• Low quiescent current consumption of only 1µA (typical)
• Power-on reset delay of 140ms (typical) ensures stable operation during power-up

Advantages and Disadvantages

Advantages: - Compact TSSOP-8 package allows for space-saving designs - Wide supply voltage range enables compatibility with various systems - Low-power consumption prolongs battery life in portable applications - Debounced reset output prevents false resets

Disadvantages: - Limited threshold voltage options may not suit all applications - Reset timeout period may not be adjustable, limiting flexibility in certain scenarios

Working Principles

The MAX708TCUA is designed to monitor the voltage level of a power supply. It compares the input voltage with a specified threshold voltage set by the TH pin. When the input voltage falls below this threshold, the device generates a reset signal on the RST pin. The reset output remains active until the input voltage rises above the threshold and a timeout period elapses.

Detailed Application Field Plans

The MAX708TCUA finds applications in various fields where voltage monitoring and reset generation are crucial. Some potential application areas include:

1. Microcontrollers and Microprocessors: Ensuring proper system initialization and preventing erratic behavior during power-up.
2. Embedded Systems: Providing reliable reset signals to ensure stable operation and prevent software glitches.
3. Industrial Control Systems: Monitoring power supply voltages to prevent damage to sensitive equipment and ensure safe operation.
4. Automotive Electronics: Resetting microcontrollers and sensors in case of voltage drops or fluctuations to maintain system integrity.
5. Battery-Powered Devices: Protecting batteries from deep discharge by initiating a reset when the voltage drops below a critical level.

Detailed and Complete Alternative Models

1. MAX705ESA+: Similar to MAX708TCUA but available in an SOIC-8 package.
2. MAX809SEUR+: Voltage monitor with adjustable threshold voltage and push-pull output in a SOT-23-3 package.
3. MAX811TEUS+: Supervisory circuit with manual reset input and watchdog timer in a SOT-143 package.

These alternative models offer similar functionality and can be considered based on specific design requirements.

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