Texas Instruments
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PCA9555PWRE4
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PCA9555PWRE4

Product Overview

Category

PCA9555PWRE4 belongs to the category of integrated circuits (ICs).

Use

It is commonly used as an I/O expander for microcontrollers.

Characteristics

  • 16-bit remote I/O port with interrupt output
  • Low standby current consumption
  • Compatible with most microcontrollers
  • Wide operating voltage range: 2.3V to 5.5V
  • High-speed I2C-bus interface
  • ESD protection exceeds 2000V HBM per JESD22-A114 and 1000V CDM per JESD22-C101

Package

PCA9555PWRE4 comes in a TSSOP-24 package.

Essence

The essence of PCA9555PWRE4 lies in its ability to expand the input/output capabilities of microcontrollers, allowing them to control more devices.

Packaging/Quantity

It is typically packaged in reels and the quantity per reel is 2500 units.

Specifications

  • Supply Voltage Range: 2.3V to 5.5V
  • Input/Output Voltage Range: 0V to VDD
  • Operating Temperature Range: -40°C to +85°C
  • I2C-bus Frequency: 100 kHz, 400 kHz, or 1 MHz
  • Standby Current Consumption: 10 µA (typical)

Detailed Pin Configuration

The PCA9555PWRE4 has a total of 24 pins, which are assigned as follows:

  1. SDA (Serial Data)
  2. SCL (Serial Clock)
  3. INT (Interrupt Output)
  4. A0 (Address Bit 0)
  5. A1 (Address Bit 1)
  6. A2 (Address Bit 2)
  7. GND (Ground)
  8. P0-P7 (I/O Ports)
  9. P8-P15 (I/O Ports)
  10. VDD (Supply Voltage)

Functional Features

  • 16 programmable I/O pins
  • Interrupt output for efficient event notification
  • Configurable input or output mode for each pin
  • Internal power-on reset
  • Noise filter on SCL/SDA inputs for improved reliability
  • Address selection pins for up to 8 devices on the same bus

Advantages and Disadvantages

Advantages

  • Allows microcontrollers to control more devices with limited I/O pins
  • Low standby current consumption helps conserve power
  • Wide operating voltage range ensures compatibility with various systems
  • High-speed I2C-bus interface enables fast data transfer

Disadvantages

  • Limited to 16 I/O pins, may not be sufficient for complex applications requiring a large number of I/Os
  • Requires additional programming and configuration compared to direct I/O control

Working Principles

PCA9555PWRE4 communicates with the microcontroller through the I2C-bus interface. The microcontroller sends commands and data to the PCA9555PWRE4, which then controls the corresponding I/O pins based on the received instructions. The interrupt output can be used to notify the microcontroller of specific events or changes in the I/O status.

Detailed Application Field Plans

PCA9555PWRE4 finds application in various fields, including but not limited to: - Home automation systems - Industrial control systems - Internet of Things (IoT) devices - Robotics - Automotive electronics

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to PCA9555PWRE4 are: - MCP23017 - PCF8574 - MAX7313 - TCA9539

These alternatives provide comparable I/O expansion capabilities and are widely used in the industry.

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Перелічіть 10 типових запитань і відповідей, пов’язаних із застосуванням PCA9555PWRE4 у технічних рішеннях

Sure! Here are 10 common questions and answers related to the application of PCA9555PWRE4:

  1. Question: What is PCA9555PWRE4?
    Answer: PCA9555PWRE4 is a 16-bit I/O expander with an I2C interface, which allows for easy expansion of digital I/O ports in various technical solutions.

  2. Question: How many I/O ports does PCA9555PWRE4 provide?
    Answer: PCA9555PWRE4 provides 16 I/O ports that can be configured as inputs or outputs.

  3. Question: What is the operating voltage range of PCA9555PWRE4?
    Answer: PCA9555PWRE4 operates within a voltage range of 2.3V to 5.5V.

  4. Question: Can PCA9555PWRE4 be used with both 3.3V and 5V microcontrollers?
    Answer: Yes, PCA9555PWRE4 is compatible with both 3.3V and 5V microcontrollers, making it versatile for different applications.

  5. Question: How is PCA9555PWRE4 controlled?
    Answer: PCA9555PWRE4 is controlled through the I2C bus, allowing for easy integration with microcontrollers and other I2C devices.

  6. Question: Can PCA9555PWRE4 be used for both input and output operations simultaneously?
    Answer: Yes, PCA9555PWRE4 supports simultaneous input and output operations on different pins, providing flexibility in various applications.

  7. Question: What is the maximum current per I/O pin that PCA9555PWRE4 can handle?
    Answer: PCA9555PWRE4 can handle a maximum current of 25mA per I/O pin.

  8. Question: Is PCA9555PWRE4 capable of generating interrupts?
    Answer: Yes, PCA9555PWRE4 has interrupt functionality that can be configured to trigger based on changes in input states.

  9. Question: Can multiple PCA9555PWRE4 devices be connected together?
    Answer: Yes, multiple PCA9555PWRE4 devices can be connected together using the I2C bus, allowing for expansion of I/O ports beyond 16.

  10. Question: Are there any development resources available for PCA9555PWRE4?
    Answer: Yes, the datasheet and application notes provided by the manufacturer offer detailed information on how to use PCA9555PWRE4 in technical solutions.

Please note that these answers are general and may vary depending on specific implementation details and requirements.