MAX6817EUT-T

Product Overview

• Category: Integrated Circuit
• Use: General-purpose input/output (GPIO) expander
• Characteristics:
  • Low-voltage, low-power operation
  • Wide operating voltage range
  • High-speed I²C interface
  • Configurable input/output pins
  • Small package size
• Package: SOT-23-6
• Essence: GPIO expansion and control
• Packaging/Quantity: Tape and Reel, 3000 units per reel

Specifications

• Supply Voltage Range: 1.65V to 5.5V
• Maximum Input Voltage: VDD + 0.3V
• Operating Temperature Range: -40°C to +85°C
• I²C Bus Speed: Up to 400kHz
• Number of I/O Pins: 6
• Quiescent Current: 1µA (typical)

Pin Configuration

The MAX6817EUT-T has a total of 6 pins arranged as follows:

```

---

| | --| VDD GND |-- Pin 1: Ground (GND) --| SDA SCL |-- Pin 2: I²C Serial Data (SDA) --| P0 P1 |-- Pin 3: Programmable I/O Pin 0 (P0) --| P2 P3 |-- Pin 4: Programmable I/O Pin 1 (P1) --| P4 P5 |-- Pin 5: Programmable I/O Pin 2 (P2) --| NC NC |-- Pin 6: No Connection (NC) |___________| ```

Functional Features

• The MAX6817EUT-T is a general-purpose GPIO expander that allows for additional input/output pins in a system.
• It communicates with the host microcontroller through the I²C interface, providing easy integration into existing designs.
• The input/output pins can be configured as either inputs or outputs, allowing for versatile usage.
• The device operates at low voltage and low power, making it suitable for battery-powered applications.
• It offers a wide operating voltage range, enabling compatibility with various systems.

Advantages and Disadvantages

Advantages: - Provides additional GPIO pins, expanding the capabilities of a microcontroller. - Small package size allows for space-efficient integration into compact designs. - High-speed I²C interface enables fast communication with the host microcontroller. - Low-voltage and low-power operation make it suitable for energy-efficient applications.

Disadvantages: - Limited number of I/O pins (6 in total), which may not be sufficient for complex systems requiring more GPIOs. - Requires an I²C bus for communication, which may add complexity to the design if not already present.

Working Principles

The MAX6817EUT-T functions as a GPIO expander by utilizing the I²C interface to communicate with the host microcontroller. The microcontroller sends commands to configure the input/output pins as either inputs or outputs. The device then responds accordingly, allowing the microcontroller to read input states or control output states.

The I²C bus speed determines the rate at which data is transferred between the MAX6817EUT-T and the microcontroller. The low quiescent current ensures minimal power consumption when the device is idle.

Detailed Application Field Plans

The MAX6817EUT-T finds application in various fields where additional GPIO pins are required. Some potential use cases include:

1. Consumer Electronics: Adding extra buttons or switches to control functions in audio/video equipment, remote controls, or gaming consoles.
2. Industrial Automation: Expanding the number of input/output channels in programmable logic controllers (PLCs) or industrial control systems.
3. Internet of Things (IoT): Enabling connectivity and control of sensors, actuators, or peripheral devices in IoT applications.
4. Automotive: Providing additional GPIOs for controlling lighting, switches, or sensors in automotive electronics.

Detailed and Complete Alternative Models

1. MCP23017: Similar to the MAX6817EUT-T, it offers 16 additional I/O pins and supports both I²C and SPI interfaces.
2. PCF8574: A basic GPIO expander with 8 additional I/O pins, compatible with I²C interface.
3. SX1509: Provides 16 additional I/O pins with advanced features like LED driver control and keypad scanning.

These alternative models offer different pin counts and additional features, catering to diverse application requirements.

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