PCA9551PW,112

Basic Information Overview

• Category: Integrated Circuit (IC)
• Use: I/O Expander
• Characteristics: Low-voltage 8-bit I2C-bus and SMBus I/O expander with interrupt output and reset
• Package: TSSOP16
• Essence: The PCA9551PW,112 is a versatile I/O expander that provides 8 bits of general-purpose parallel input/output (I/O) expansion for the two-line bidirectional I2C-bus (I2C) and SMBus applications.
• Packaging/Quantity: The PCA9551PW,112 is typically sold in reels of 2500 units.

Specifications

• Supply Voltage Range: 2.3 V to 5.5 V
• I/O Compatibility: 2.5 V, 3.3 V, 5 V
• I2C-bus/SMBus Frequency: Up to 400 kHz
• Number of I/Os: 8
• Interrupt Output: Active-Low Open-Drain
• Reset Input: Active-Low
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The PCA9551PW,112 has a total of 16 pins arranged as follows:

```

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| | | 1 2 3 | | | | 4 5 6 | | | | 7 8 9 | | | | 10 11 12 | | | | 13 14 15 | |_______________| ```

Pin Description: 1. SDA - Serial Data Input/Output 2. SCL - Serial Clock Input 3. A0 - Address Input 4. A1 - Address Input 5. A2 - Address Input 6. RESET - Reset Input 7-14. P0-P7 - General Purpose I/O Pins 15. INT - Interrupt Output 16. VCC - Supply Voltage

Functional Features

• Bidirectional I/O Expansion: The PCA9551PW,112 provides 8 bits of general-purpose parallel I/O expansion.
• I2C-bus/SMBus Compatible: It supports the two-line bidirectional I2C-bus and SMBus protocols for communication with a microcontroller or other devices.
• Interrupt Output: The device features an interrupt output that can be used to notify the microcontroller when any of the I/O pins change state.
• Reset Functionality: The PCA9551PW,112 includes a reset input pin that allows the microcontroller to reset the device.
• Low Standby Current: The device has a low standby current consumption, making it suitable for power-sensitive applications.

Advantages and Disadvantages

Advantages: - Versatile I/O expander for various applications - Supports popular communication protocols (I2C-bus and SMBus) - Interrupt functionality for efficient event handling - Low standby current consumption

Disadvantages: - Limited number of I/O pins (8 in total)

Working Principles

The PCA9551PW,112 operates by communicating with a microcontroller or other devices through the I2C-bus or SMBus interface. It expands the available I/O pins by providing 8 additional general-purpose I/Os. The device can be controlled and configured using simple commands sent over the bus. It also features an interrupt output that can be used to trigger an interrupt on the microcontroller when any of the I/O pins change state. The reset input allows the microcontroller to reset the device if needed.

Detailed Application Field Plans

The PCA9551PW,112 can be used in various applications that require additional I/O pins. Some potential application fields include: - Industrial automation - Home automation - Internet of Things (IoT) devices - Robotics - Sensor interfaces - LED control systems

Detailed and Complete Alternative Models

Some alternative models to the PCA9551PW,112 that offer similar functionality are: - PCA9554PW,112: 8-bit I2C-bus and SMBus I/O expander with interrupt output and reset - MCP23008-E/SO: 8-bit I/O expander with I2C interface - TCA9539PW,118: 16-bit I2C and SMBus I/O expander with interrupt output

Note: The above list is not exhaustive and there may be other alternative models available in the market.

This entry provides a comprehensive overview of the PCA9551PW,112, including its basic information, specifications, pin configuration, functional features, advantages and disadvantages, working principles, application field plans, and alternative models.