PCA9554CPWJ

Product Overview

Category: Integrated Circuit (IC)

Use: The PCA9554CPWJ is a 8-bit I2C-bus and SMBus I/O expander designed for applications that require additional I/O pins. It provides remote I/O expansion for most microcontroller families via the I2C-bus interface.

Characteristics: - 8-bit remote I/O port with interrupt output - Low standby current consumption of 1 µA - Compatible with I2C-bus and SMBus interfaces - Schmitt trigger inputs for noise suppression - Internal power-on reset - Noise filter on SCL/SDA inputs - Latched outputs with high-current drive capability for directly driving LEDs - ESD protection exceeds 2000 V HBM per JESD22-A114, 200 V MM per JESD22-A115, and 1000 V CDM per JESD22-C101

Package: TSSOP20 package

Essence: The PCA9554CPWJ is an integrated circuit that expands the number of input/output (I/O) pins available in a microcontroller-based system. It allows for easy integration of additional I/O functionality without the need for complex wiring or hardware modifications.

Packaging/Quantity: The PCA9554CPWJ is typically sold in reels of 250 units.

Specifications

• Supply Voltage: 2.3 V to 5.5 V
• Input/Output Voltage: 0 V to VDD
• Operating Temperature Range: -40°C to +85°C
• I2C-bus Frequency: 100 kHz, 400 kHz, and 1 MHz

Pin Configuration

The PCA9554CPWJ has a total of 20 pins arranged as follows:

```

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| | |1 20| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |_______________| ```

Functional Features

• 8-bit I/O expander with interrupt output
• Supports both input and output modes for each I/O pin
• Configurable polarity inversion for the inputs
• Latched outputs with high-current drive capability for directly driving LEDs
• Low standby current consumption allows for power-efficient operation

Advantages and Disadvantages

Advantages: - Provides additional I/O pins for microcontroller-based systems - Easy integration via I2C-bus interface - Low power consumption in standby mode - High ESD protection for robustness

Disadvantages: - Limited to 8-bit I/O expansion - Requires I2C-bus or SMBus support in the microcontroller

Working Principles

The PCA9554CPWJ communicates with the microcontroller via the I2C-bus interface. It acts as an I/O expander, allowing the microcontroller to control and monitor additional I/O pins. The device can be configured for input or output mode on a per-pin basis. It also supports interrupt functionality, providing a signal to the microcontroller when a change in input state is detected.

Detailed Application Field Plans

The PCA9554CPWJ finds applications in various fields where additional I/O pins are required. Some potential application areas include: - Industrial automation - Home automation - Internet of Things (IoT) devices - Robotics - Automotive electronics

Alternative Models

There are several alternative models available that offer similar functionality to the PCA9554CPWJ. Some popular alternatives include: - MCP23017 - PCF8574 - MAX7313

These alternative models may have slightly different specifications and pin configurations, but they serve the same purpose of expanding I/O capabilities in microcontroller-based systems.

In conclusion, the PCA9554CPWJ is a versatile I/O expander IC that provides additional I/O pins for microcontroller-based systems. Its compact package, low power consumption, and compatibility with I2C-bus interface make it a popular choice in various applications.