MAX6734KASYD3+T

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Monitoring and Supervision
• Characteristics: Low-power, Precision, Programmable, Reset Output
• Package: SOT23-6
• Essence: Monitors the voltage level of a power supply and provides a reset signal when the voltage falls below a certain threshold.
• Packaging/Quantity: Tape and Reel, 3000 units per reel

Specifications

• Supply Voltage Range: 1.6V to 5.5V
• Threshold Voltage Options: Programmable from 1.2V to 4.63V in 100mV steps
• Reset Timeout Period: Programmable from 1ms to 640ms in 20ms steps
• Quiescent Current: 1µA (typical)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The MAX6734KASYD3+T has a total of 6 pins arranged as follows:

```

---

| | --| VCC GND |-- Pin 1: Ground (GND) --| RST OUT |-- Pin 2: Reset Output (OUT) --| TH MR |-- Pin 3: Manual Reset Input (MR) --| CT TR |-- Pin 4: Capacitor Terminal (CT) --| GND VCC |-- Pin 5: Supply Voltage (VCC) |___________| ```

Functional Features

• Monitors the supply voltage and generates a reset signal when it falls below the programmed threshold.
• Provides a manual reset input for immediate system reset.
• Programmable threshold voltage allows flexibility in monitoring different power supply levels.
• Adjustable reset timeout period to accommodate various system requirements.
• Low quiescent current ensures minimal power consumption.

Advantages and Disadvantages

Advantages

• Precise voltage monitoring helps prevent system malfunctions due to low supply voltage.
• Programmable threshold and reset timeout offer customization options for different applications.
• Low-power operation extends battery life in portable devices.
• Small package size (SOT23-6) allows for space-efficient designs.

Disadvantages

• Limited to monitoring a single power supply voltage.
• Requires an external capacitor for proper operation.
• Not suitable for high-voltage applications.

Working Principles

The MAX6734KASYD3+T operates by comparing the supply voltage with the programmed threshold voltage. When the supply voltage drops below the threshold, the reset output is activated, signaling a low-voltage condition. The reset output remains active until the supply voltage rises above the threshold or a manual reset signal is applied.

To ensure stable operation, an external capacitor is connected to the CT pin. This capacitor sets the reset timeout period, allowing for a delay before the reset output is deactivated after the supply voltage returns to normal.

Detailed Application Field Plans

The MAX6734KASYD3+T is commonly used in various applications where voltage monitoring and supervision are critical. Some potential application fields include:

1. Battery-Powered Devices: Ensuring proper shutdown or hibernation when the battery voltage drops below a safe level.
2. Industrial Control Systems: Monitoring power supply integrity to prevent equipment damage or data loss during voltage fluctuations.
3. Automotive Electronics: Protecting sensitive electronic components from voltage dips or spikes, enhancing overall system reliability.
4. Medical Equipment: Safeguarding patient safety by triggering alarms or shutdowns in case of power supply abnormalities.
5. Home Automation: Enabling intelligent control systems to respond appropriately to power supply variations.

Detailed and Complete Alternative Models

1. MAX6733KASYD3+T: Similar to MAX6734KASYD3+T but with a different package (SOT23-5).
2. MAX6735KASYD3+T: Higher voltage range (up to 12V) and extended temperature range (-40°C to +125°C).
3. MAX6736KASYD3+T: Lower quiescent current (500nA typical) for ultra-low-power applications.

These alternative models offer similar functionality but may have variations in package, voltage range, temperature range, or power consumption to suit specific application requirements.

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