PCA9550D,112

Product Overview

Category

The PCA9550D,112 belongs to the category of integrated circuits (ICs) and specifically falls under the family of I/O expanders.

Use

This product is primarily used for expanding the input/output (I/O) capabilities of microcontrollers or other digital systems. It allows for additional digital inputs and outputs to be controlled using a minimal number of pins on the host device.

Characteristics

• I2C-bus interface compatibility
• 8-bit remote I/O port with interrupt capability
• Low standby current consumption
• Schmitt trigger inputs for noise suppression
• Open-drain interrupt output
• ESD protection exceeds 2000 V HBM per JESD22-A114 and 1000 V CDM per JESD22-C101

Package

The PCA9550D,112 is available in a small outline package (SOT96-1), which is commonly known as a SOIC-16 package. This package provides ease of handling and integration into various electronic systems.

Essence

The essence of the PCA9550D,112 lies in its ability to provide additional I/O ports to a host device while utilizing only two pins for communication through the I2C-bus interface.

Packaging/Quantity

The PCA9550D,112 is typically supplied in reels or tubes, with each reel containing 2500 units or each tube containing 98 units. The packaging ensures safe transportation and storage of the product.

Specifications

• Supply voltage range: 2.3 V to 5.5 V
• Input voltage range: GND to VDD
• Operating temperature range: -40°C to +85°C
• I2C-bus frequency: Up to 400 kHz
• Maximum output current: 25 mA per I/O pin

Detailed Pin Configuration

The PCA9550D,112 features a total of 16 pins, which are assigned specific functions as follows:

1. A0: Address input pin
2. A1: Address input pin
3. A2: Address input pin
4. SDA: Serial data input/output pin (I2C-bus)
5. SCL: Serial clock input pin (I2C-bus)
6. INT: Interrupt output pin
7. P0-P7: I/O port pins

Functional Features

• I2C-bus interface compatibility allows for easy integration with various microcontrollers and digital systems.
• The interrupt capability enables efficient handling of input/output events, reducing the need for continuous polling.
• Low standby current consumption ensures energy efficiency in battery-powered applications.
• Schmitt trigger inputs provide noise suppression, enhancing the reliability of signal detection.
• Open-drain interrupt output facilitates connection to external interrupt handlers.

Advantages and Disadvantages

Advantages

• Simplifies I/O expansion in digital systems
• Requires only two pins for communication
• Compatible with popular I2C-bus interface
• Provides interrupt capability for efficient event handling
• Low power consumption

Disadvantages

• Limited number of I/O ports (8 in total)
• May require additional components for certain applications

Working Principles

The PCA9550D,112 operates by receiving commands and data through the I2C-bus interface from the host device. It interprets these commands to control the state of its I/O ports accordingly. The interrupt output pin can be configured to generate an interrupt signal when specific events occur on the I/O ports, allowing the host device to respond promptly.

Detailed Application Field Plans

The PCA9550D,112 finds application in various fields where expanding the I/O capabilities of microcontrollers or digital systems is required. Some potential application areas include:

1. Home automation systems: Enabling control of multiple devices and sensors through a central microcontroller.
2. Industrial automation: Facilitating the connection of numerous sensors, actuators, and peripheral devices to a control system.
3. Internet of Things (IoT) devices: Allowing for efficient management of inputs and outputs in IoT applications.
4. Automotive electronics: Supporting the integration of additional functionalities in vehicles, such as lighting controls or sensor inputs.

Detailed and Complete Alternative Models

• PCA9550D,118
• PCA9550DP,118
• PCA9550PW,112
• PCA9550PW,118

These alternative models offer similar functionality and characteristics to the PCA9550D,112, providing flexibility in choosing the most suitable option for specific applications.

In conclusion, the PCA9550D,112 is an integrated circuit belonging to the I/O expander family. It offers expanded I/O capabilities with minimal pin usage, making it a versatile solution for various digital systems. Its compatibility with the I2C-bus interface, interrupt capability, and low power consumption contribute to its advantages. However, the limited