MAX6814XK+T

Product Overview

• Category: Integrated Circuit (IC)
• Use: Digital Input/Output Expander
• Characteristics: Low-power, 8-bit I/O expander, I2C interface, open-drain outputs, programmable interrupt output, cascading capability
• Package: SOT23-16
• Essence: The MAX6814XK+T is a versatile digital input/output expander designed for low-power applications. It provides additional I/O lines using the I2C interface, making it ideal for systems with limited GPIO pins.
• Packaging/Quantity: The MAX6814XK+T is available in a SOT23-16 package and is typically sold in reels of 3000 units.

Specifications

• Supply Voltage: 1.7V to 5.5V
• I/O Voltage: 1.7V to VCC
• Maximum I/O Current: ±25mA
• Operating Temperature Range: -40°C to +85°C
• I2C Bus Speed: Up to 400kHz
• Interrupt Output: Open-drain, active-low
• Address Selection Pins: Allows up to eight devices on the same bus

Pin Configuration

The MAX6814XK+T has a total of 16 pins arranged as follows:

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| | | 1 2 3 4 5 | | 6 7 8 9 10 | |11 12 13 14 15 | |_______________| ```

1. SDA: Serial Data Input/Output
2. SCL: Serial Clock Input
3. A0: Address Selection Bit 0
4. A1: Address Selection Bit 1
5. RESET: Active-Low Reset Input
6. INT: Interrupt Output 7-14. I/O0-I/O7: General-Purpose I/O Lines
7. VCC: Supply Voltage
8. GND: Ground

Functional Features

• Low-power consumption, suitable for battery-powered devices
• Expandable I/O capability using the I2C interface
• Open-drain outputs allow easy interfacing with other devices
• Programmable interrupt output for efficient event handling
• Cascading capability enables multiple devices to be connected on the same bus

Advantages and Disadvantages

Advantages: - Provides additional I/O lines in space-constrained systems - Low-power operation extends battery life - Flexible address selection allows multiple devices on the same bus - Easy integration with other devices through open-drain outputs

Disadvantages: - Limited number of I/O lines (8 in total) - Requires an I2C interface for communication

Working Principles

The MAX6814XK+T operates as a digital input/output expander by utilizing the I2C interface. It communicates with the microcontroller or host device through the SDA (Serial Data) and SCL (Serial Clock) lines. The device can be addressed using the A0 and A1 pins, allowing up to eight devices to be connected on the same I2C bus.

The I/O lines (I/O0-I/O7) can be configured as either inputs or outputs. The open-drain outputs provide flexibility in interfacing with other devices. The MAX6814XK+T also features a programmable interrupt output (INT), which can be used to efficiently handle events or trigger actions in the system.

Detailed Application Field Plans

The MAX6814XK+T finds applications in various fields where additional I/O lines are required. Some potential application areas include:

1. Consumer Electronics: Used in smart home devices, remote controls, and wearable gadgets to expand the number of available I/O pins.
2. Industrial Automation: Integrated into industrial control systems to provide additional digital I/O capabilities for sensors, actuators, and communication interfaces.
3. Automotive Electronics: Employed in automotive applications such as infotainment systems, dashboard controls, and lighting modules to enhance connectivity and functionality.
4. Internet of Things (IoT): Utilized in IoT devices to enable communication with multiple sensors, actuators, and peripherals while minimizing the use of GPIO pins.

Detailed and Complete Alternative Models

• MAX7313: 16-bit I/O expander with I2C interface
• MCP23017: 16-bit I/O expander with I2C/SPI interface
• PCF8574: 8-bit I/O expander with I2C interface
• PCA9535: 16-bit I/O expander with I2C interface and interrupt output

These alternative models offer similar functionality and can be considered based on specific requirements and compatibility with the