PCA9554PW,118

Basic Information Overview

• Category: Integrated Circuit (IC)
• Use: I/O Expander
• Characteristics:
  • 8-bit I/O expander with I2C-bus/SMBus interface
  • Low standby current consumption of 1 µA
  • Schmitt trigger inputs for noise suppression
  • Open-drain interrupt output
• Package: TSSOP (Thin Shrink Small Outline Package)
• Essence: The PCA9554PW,118 is a versatile I/O expander IC that provides additional input/output ports for microcontrollers or other devices.
• Packaging/Quantity: Available in reels, with 2500 units per reel.

Specifications

• Supply Voltage: 2.3V to 5.5V
• Input/Output Voltage: 0V to VDD
• Maximum Output Current: 25mA per I/O pin
• Operating Temperature Range: -40°C to +85°C
• Communication Interface: I2C-bus/SMBus

Detailed Pin Configuration

The PCA9554PW,118 has a total of 16 pins, which are assigned as follows:

| Pin Number | Pin Name | Description | |------------|----------|-------------| | 1 | SDA | Serial Data Input/Output | | 2 | SCL | Serial Clock Input | | 3-10 | P0-P7 | General Purpose I/O Pins | | 11 | INT | Interrupt Output | | 12 | A0 | Address Input Bit 0 | | 13 | A1 | Address Input Bit 1 | | 14 | A2 | Address Input Bit 2 | | 15 | GND | Ground | | 16 | VDD | Supply Voltage |

Functional Features

• Provides 8-bit bidirectional I/O expansion through the I2C-bus/SMBus interface.
• Allows multiple devices to be connected on the same bus, providing a simple and efficient way to expand I/O capabilities.
• Supports interrupt functionality, allowing the host microcontroller to be notified when an input changes state.
• Low standby current consumption makes it suitable for battery-powered applications.
• Schmitt trigger inputs ensure reliable operation in noisy environments.

Advantages and Disadvantages

Advantages

• Easy integration with microcontrollers or other devices using the I2C-bus/SMBus interface.
• Compact package size allows for space-efficient designs.
• Low power consumption extends battery life in portable applications.
• Interrupt functionality reduces the need for continuous polling of input states.

Disadvantages

• Limited number of I/O pins (8) may not be sufficient for complex systems requiring a large number of inputs/outputs.
• Requires additional components (microcontroller, I2C-bus/SMBus interface) for full functionality.

Working Principles

The PCA9554PW,118 operates as an I/O expander by communicating with a host microcontroller or other devices through the I2C-bus/SMBus interface. It provides 8 additional general-purpose I/O pins that can be configured as inputs or outputs. The device supports interrupt functionality, allowing the host to be notified when an input changes state. The low standby current consumption ensures minimal power usage when the device is not actively processing data.

Detailed Application Field Plans

The PCA9554PW,118 finds applications in various fields, including but not limited to: - Industrial automation: Used to expand the I/O capabilities of programmable logic controllers (PLCs) or industrial control systems. - Consumer electronics: Integrated into devices such as smart home systems, IoT devices, and remote controls to provide additional I/O ports. - Automotive: Utilized for expanding I/O capabilities in automotive control systems, infotainment systems, and lighting controls. - Medical devices: Integrated into medical equipment to provide additional I/O ports for sensors, actuators, and user interfaces.

Detailed and Complete Alternative Models

• PCA9554APW,118: Similar to PCA9554PW,118 but available in a different package (TSSOP).
• PCA9538PW,118: 8-bit I/O expander with similar features but includes an internal oscillator for PWM (Pulse Width Modulation) functionality.
• MCP23008-I/SS: Another 8-bit I/O expander with I2C interface, offered by Microchip Technology Inc.
• TCA9539PW,118: 16-bit I/O expander with I2C-bus/SMBus interface, providing even more I/O pins.

Note: This is not an exhaustive list, and there are several other alternative models available in the market.

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