MAX6819UT+T

Product Overview

• Category: Integrated Circuit
• Use: Digital Input/Output Expander
• Characteristics: Low-voltage, I²C-Compatible, 8-Bit GPIO Expander
• Package: SOT23-6
• Essence: Expand the number of general-purpose input/output (GPIO) pins in a microcontroller
• Packaging/Quantity: Tape and Reel, 3000 units per reel

Specifications

• Supply Voltage Range: 1.7V to 5.5V
• Number of GPIO Pins: 8
• I²C Bus Compatibility: Standard-mode (100kHz) and Fast-mode (400kHz)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The MAX6819UT+T has a total of six pins arranged as follows:

```

---

| | --| VDD GND |-- Pin 1: Power Supply --| SDA SCL |-- Pin 2: I²C Bus Interface --| P0 P1 |-- Pins 3 and 4: General-Purpose Input/Output (GPIO) Pins --| P2 P3 |-- Pins 5 and 6: General-Purpose Input/Output (GPIO) Pins |___________| ```

Functional Features

• Provides additional GPIO pins for microcontrollers with limited I/O capabilities
• Supports bidirectional I/O on all pins
• Can be used as either inputs or outputs individually
• Configurable interrupt output pin for efficient event-driven systems
• Low standby current consumption for power-sensitive applications

Advantages and Disadvantages

Advantages: - Compact SOT23-6 package allows for space-efficient designs - Wide supply voltage range enables compatibility with various microcontrollers - I²C bus compatibility simplifies interfacing with other devices - Configurable interrupt output enhances system responsiveness

Disadvantages: - Limited number of GPIO pins (8) may not be sufficient for complex applications - SOT23-6 package may require additional PCB space compared to smaller packages

Working Principles

The MAX6819UT+T is an I²C-compatible digital input/output expander. It communicates with a microcontroller through the I²C bus, expanding the available GPIO pins. The microcontroller can control the direction (input or output) and logic level of each pin individually. The device also features a configurable interrupt output that can be used to notify the microcontroller of specific events.

Detailed Application Field Plans

The MAX6819UT+T finds application in various fields where additional GPIO pins are required. Some potential use cases include:

1. Home Automation: Controlling multiple sensors and actuators in a smart home system.
2. Industrial Control Systems: Expanding the I/O capabilities of programmable logic controllers (PLCs).
3. Internet of Things (IoT): Enabling connectivity and control of numerous IoT devices.
4. Robotics: Providing additional I/O for controlling motors, sensors, and other peripherals.
5. Automotive Electronics: Supporting various functions such as lighting control and sensor interfacing.

Detailed and Complete Alternative Models

1. MCP23017: 16-Bit I/O Expander with I²C Interface
2. PCF8574: 8-Bit Remote I/O Expander for I²C-bus
3. SN74HC595: 8-Bit Shift Register with Serial Input/Parallel Output

These alternative models offer similar functionality to the MAX6819UT+T and can be considered based on specific project requirements.

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