MAX7321AEE+T

Product Overview

• Category: Integrated Circuit
• Use: GPIO Expander
• Characteristics: Low-voltage, I2C-Compatible 8-Bit I/O Port Expander with Interrupt Output and Configuration Registers
• Package: 16-pin QSOP (Quarter Small Outline Package)
• Essence: The MAX7321AEE+T is a versatile GPIO expander that allows for easy expansion of general-purpose input/output (GPIO) ports in various applications.
• Packaging/Quantity: Available in tape and reel packaging, with 2500 units per reel.

Specifications

• Supply Voltage Range: 1.65V to 5.5V
• Number of I/O Ports: 8
• I/O Port Voltage Range: 0V to VDD
• Maximum Sink/Source Current per I/O: ±4mA
• I2C Bus Compatibility: Standard-mode (100kHz) and Fast-mode (400kHz)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The MAX7321AEE+T features a 16-pin QSOP package with the following pin configuration:

1. SDA - Serial Data Input/Output
2. SCL - Serial Clock Input
3. A0 - Address Input Bit 0
4. A1 - Address Input Bit 1
5. INT - Interrupt Output
6. GND - Ground
7. P0 - General-Purpose I/O Port 0
8. P1 - General-Purpose I/O Port 1
9. P2 - General-Purpose I/O Port 2
10. P3 - General-Purpose I/O Port 3
11. P4 - General-Purpose I/O Port 4
12. P5 - General-Purpose I/O Port 5
13. P6 - General-Purpose I/O Port 6
14. P7 - General-Purpose I/O Port 7
15. VDD - Supply Voltage
16. NC - No Connection

Functional Features

• Low-voltage operation allows for compatibility with a wide range of systems.
• I2C interface enables easy communication with microcontrollers and other devices.
• Interrupt output provides efficient event notification.
• Configuration registers allow for flexible customization of the device's behavior.

Advantages and Disadvantages

Advantages: - Versatile GPIO expander suitable for various applications. - Low-voltage operation enhances compatibility. - I2C interface simplifies integration with other devices. - Interrupt output improves efficiency in event-driven systems.

Disadvantages: - Limited number of I/O ports (8 in total). - Maximum sink/source current per I/O is relatively low (±4mA).

Working Principles

The MAX7321AEE+T operates as a GPIO expander by utilizing an I2C interface to communicate with a master device, such as a microcontroller. The device acts as an intermediary between the master device and external peripherals, expanding the available GPIO ports. It can be configured through its registers to suit specific application requirements.

Detailed Application Field Plans

The MAX7321AEE+T finds applications in various fields, including but not limited to: - Industrial automation - Consumer electronics - Internet of Things (IoT) devices - Home automation - Robotics

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the MAX7321AEE+T are: - MCP23008 from Microchip Technology Inc. - PCF8574 from NXP Semiconductors - TCA9539 from Texas Instruments - SN74HC595 from Texas Instruments

These alternatives provide comparable GPIO expansion capabilities and can be considered based on specific project requirements.

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