PI4IOE5V9539LE

Product Overview

• Category: Integrated Circuit
• Use: I/O Expander
• Characteristics: High-speed, low-voltage, bidirectional voltage-level translation
• Package: QFN (Quad Flat No-leads)
• Essence: Interface IC for expanding the number of I/O pins in a microcontroller
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage: 1.65V to 5.5V
• Number of I/O Pins: 16
• Maximum Frequency: 400 MHz
• Operating Temperature Range: -40°C to +85°C
• Input/Output Logic Levels: 1.8V, 2.5V, 3.3V, and 5V

Detailed Pin Configuration

The PI4IOE5V9539LE has a total of 24 pins, which are configured as follows:

• Pin 1: VDD (Power Supply)
• Pin 2: SDA (I2C Serial Data)
• Pin 3: SCL (I2C Serial Clock)
• Pin 4-7: GPIO0-GPIO3 (General Purpose I/O)
• Pin 8-15: GPIO4-GPIO11 (General Purpose I/O)
• Pin 16: INT (Interrupt Output)
• Pin 17: GND (Ground)
• Pin 18-21: GPIO12-GPIO15 (General Purpose I/O)
• Pin 22: OE (Output Enable)
• Pin 23: RESET (Reset Input)
• Pin 24: VREF (Reference Voltage)

Functional Features

• Bidirectional voltage-level translation between different logic levels
• Supports I2C communication protocol
• Low power consumption
• Fast switching speed
• ESD protection on all pins
• Internal pull-up resistors for I2C bus

Advantages and Disadvantages

Advantages: - Allows expansion of I/O pins in microcontrollers with limited pin count - Supports multiple logic voltage levels, increasing compatibility - Provides bidirectional voltage-level translation, simplifying interfacing between different devices - Low power consumption enhances energy efficiency - Fast switching speed enables high-speed data transfer

Disadvantages: - Limited number of I/O pins (16 in total) - Requires additional components for proper operation (e.g., pull-up resistors for I2C bus)

Working Principles

The PI4IOE5V9539LE is an I/O expander that utilizes the I2C communication protocol to interface with a microcontroller. It acts as a bridge between the microcontroller and external devices by expanding the available I/O pins. The device translates the logic voltage levels between the microcontroller and connected devices, allowing seamless communication.

Detailed Application Field Plans

The PI4IOE5V9539LE finds applications in various fields, including:

1. Consumer Electronics: Used in smart home devices, remote controls, and wearable devices to expand the number of available I/O pins.
2. Industrial Automation: Enables connectivity between microcontrollers and sensors/actuators in industrial control systems.
3. Automotive: Facilitates communication between microcontrollers and peripheral devices in automotive applications, such as infotainment systems and dashboard controls.
4. Internet of Things (IoT): Integrates with IoT devices to provide additional I/O capabilities for sensor data acquisition and actuator control.

Detailed and Complete Alternative Models

1. PCA9538: 8-bit I/O expander with I2C interface, suitable for low-pin-count applications.
2. MCP23017: 16-bit I/O expander with I2C/SPI interface, offers more I/O pins and additional features like interrupt support.
3. MAX7313: 16-bit I/O expander with I2C interface, provides higher current drive capability for driving LEDs and other high-power devices.

These alternative models offer similar functionality to the PI4IOE5V9539LE and can be considered based on specific project requirements.

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