PI4IOE5V9538LE

Product Overview

• Category: Integrated Circuit
• Use: IO Expander
• Characteristics: High-speed, low-voltage, bidirectional voltage-level translation
• Package: QFN (Quad Flat No-leads)
• Essence: Expands the number of input/output pins of a microcontroller or other digital devices
• Packaging/Quantity: Available in reels of 2500 units

Specifications

• Operating Voltage: 1.65V to 5.5V
• Number of I/O Pins: 8
• I/O Voltage Level Translation: 1.2V to 5.5V
• Maximum Frequency: 400 MHz
• Interface: I2C (Inter-Integrated Circuit)

Detailed Pin Configuration

The PI4IOE5V9538LE has a total of 20 pins. The pin configuration is as follows:

1. VCC - Power supply voltage
2. GND - Ground
3. SDA - Serial Data Line (I2C)
4. SCL - Serial Clock Line (I2C)
5. INT - Interrupt output
6. OE - Output Enable
7. A0 - Address bit 0
8. A1 - Address bit 1
9. I/O0 - Bidirectional I/O pin 0
10. I/O1 - Bidirectional I/O pin 1
11. I/O2 - Bidirectional I/O pin 2
12. I/O3 - Bidirectional I/O pin 3
13. I/O4 - Bidirectional I/O pin 4
14. I/O5 - Bidirectional I/O pin 5
15. I/O6 - Bidirectional I/O pin 6
16. I/O7 - Bidirectional I/O pin 7
17. VREF - Reference voltage for level translation
18. SDA_EXT - External Serial Data Line (I2C)
19. SCL_EXT - External Serial Clock Line (I2C)
20. GND - Ground

Functional Features

• Bidirectional voltage-level translation between low-voltage and high-voltage domains
• Supports I2C interface for communication with the microcontroller or other devices
• Provides interrupt output for efficient event handling
• Output enable pin allows individual control of each I/O pin
• Address pins allow multiple devices to be connected on the same bus

Advantages and Disadvantages

Advantages: - High-speed operation up to 400 MHz - Wide operating voltage range - Small package size for space-constrained applications - Easy integration with microcontrollers and digital devices

Disadvantages: - Limited number of I/O pins (8 in total) - Requires external pull-up resistors for I2C communication

Working Principles

The PI4IOE5V9538LE is an IO expander that utilizes bidirectional voltage-level translation to expand the number of input/output pins of a microcontroller or other digital devices. It operates as an I2C slave device, communicating with the master device through the SDA and SCL lines.

The device translates the voltage levels between the low-voltage domain (1.2V to 5.5V) and the high-voltage domain (1.65V to 5.5V), allowing seamless communication between devices operating at different voltage levels. The bidirectional nature of the translation enables both input and output functionality for each I/O pin.

The PI4IOE5V9538LE also features an interrupt output pin, which can be used to signal events or trigger actions in the microcontroller. The output enable pin allows individual control of each I/O pin, enabling efficient power management and reducing overall power consumption.

Detailed Application Field Plans

The PI4IOE5V9538LE finds applications in various fields where there is a need for expanding the number of I/O pins. Some potential application areas include:

1. Internet of Things (IoT) devices
2. Industrial automation systems
3. Consumer electronics
4. Automotive electronics
5. Robotics
6. Medical devices

In IoT devices, the IO expander can be used to connect multiple sensors, actuators, and communication modules to a microcontroller with limited I/O pins. In industrial automation systems, it can facilitate the control and monitoring of various equipment and sensors. In consumer electronics, it can enable additional user interface elements or expand connectivity options.

Detailed and Complete Alternative Models

• PCA9538: Similar IO expander with 8 bidirectional I/O pins, I2C interface, and interrupt output.
• MCP23008: IO expander with 8 bidirectional I/O pins, I2C interface, interrupt output, and hardware address pins.
• **TCA6424