PCA9554ADGVR

Product Overview

Category: Integrated Circuit (IC)

Use: The PCA9554ADGVR is a 16-bit I2C-bus and SMBus I/O expander designed for applications that require additional I/O pins. It provides general-purpose remote I/O expansion for most microcontroller families via the I2C-bus interface.

Characteristics: - 16 programmable GPIO pins - Low standby current consumption - Wide supply voltage range: 2.3V to 5.5V - Compatible with I2C-bus and SMBus protocols - Interrupt output pin for efficient bus utilization - Internal power-on reset - Noise filter on SCL/SDA inputs for improved performance - ESD protection exceeds 2000V HBM per JESD22-A114 and 1000V CDM per JESD22-C101

Package: VSSOP-24

Essence: The PCA9554ADGVR is an integrated circuit that expands the number of available input/output (I/O) pins in a microcontroller-based system. It allows for easy integration of additional peripheral devices or sensors by providing 16 programmable GPIO pins.

Packaging/Quantity: The PCA9554ADGVR is typically sold in reels, with each reel containing 2500 units.

Specifications

• Supply Voltage Range: 2.3V to 5.5V
• Input/Output Voltage Range: 0V to VDD
• Maximum Output Current: ±10mA
• Standby Current: 1µA (typical)
• Operating Temperature Range: -40°C to +85°C
• Package Type: VSSOP-24

Pin Configuration

The PCA9554ADGVR has a total of 24 pins, which are arranged as follows:

```

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| | | 1 24 | | | | 2 23 | | | | 3 22 | | | | 4 21 | | | | 5 20 | | | | 6 19 | | | | 7 18 | | | | 8 17 | | | | 9 16 | | | |10 15 | | | |11 14 | | | |12 13 | |_______________| ```

Functional Features

• I2C-bus and SMBus compatible interface
• Programmable I/O pins for input or output mode selection
• Internal power-on reset ensures predictable start-up conditions
• Noise filter on SCL/SDA inputs for improved performance in noisy environments
• Interrupt output pin allows efficient bus utilization by signaling when an input state has changed

Advantages and Disadvantages

Advantages: - Provides additional I/O pins for microcontroller-based systems - Low standby current consumption helps conserve power - Wide supply voltage range allows compatibility with various systems - Compatible with popular I2C-bus and SMBus protocols - ESD protection ensures robustness against electrostatic discharge

Disadvantages: - Limited to 16 programmable GPIO pins, may not be sufficient for complex applications requiring a large number of I/Os - Requires familiarity with I2C-bus or SMBus protocols for proper integration

Working Principles

The PCA9554ADGVR communicates with the microcontroller via the I2C-bus or SMBus interface. It acts as an I/O expander, allowing the microcontroller to control and monitor the state of the 16 programmable GPIO pins. The device can be configured to operate in input or output mode for each pin individually.

When an input pin is configured, the PCA9554ADGVR can detect changes in the input state and generate an interrupt signal on the interrupt output pin. This allows the microcontroller to efficiently respond to events without continuously polling the input pins.

Detailed Application Field Plans

The PCA9554ADGVR finds applications in various fields where additional I/O pins are required. Some potential application areas include:

1. Industrial Automation: Used to interface with sensors, actuators, and other peripheral devices in automated systems.
2. Home Automation: Enables control and monitoring of home appliances, lighting systems, and security devices.
3. Internet of Things (IoT): Integrates with IoT devices to expand their connectivity options and enable interaction with the physical world.
4. Robotics: Provides additional I/Os for controlling motors, sensors, and other components in robotic systems.
5. Automotive Electronics: Used for interf