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PCA9538PW
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PCA9538PW

Product Overview

Category

The PCA9538PW belongs to the category of I2C-bus controlled 8-bit I/O expander for open-drain outputs.

Use

It is used to provide general-purpose remote I/O expansion for most microcontroller families via the I2C-bus interface.

Characteristics

  • 5 V tolerant I/Os
  • Low standby current
  • Operating power supply voltage range of 2.3 V to 5.5 V
  • Compatible with most microcontrollers
  • Open-drain active-low interrupt output
  • ESD protection exceeds 2000 V HBM per JESD22-A114, 200 V MM per JESD22-A115, and 1000 V CDM per JESD22-C101

Package

The PCA9538PW comes in a TSSOP24 package.

Essence

The essence of PCA9538PW lies in its ability to provide a simple solution when additional I/Os are needed while minimizing microcontroller pin usage.

Packaging/Quantity

The PCA9538PW is typically available in reels with a quantity of 2500 units per reel.

Specifications

  • Operating Voltage: 2.3 V to 5.5 V
  • Number of I/Os: 8
  • I2C-bus Address: Three hardware address pins allow eight devices on the same bus
  • Standby Current: 1 µA (max)
  • Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The detailed pin configuration of PCA9538PW can be found in the datasheet provided by the manufacturer.

Functional Features

  • Software reset feature allows the device to be reset through the I2C-bus
  • Noise filter on SCL/SDA inputs
  • Polarity inversion register to configure the polarity of the input port data

Advantages and Disadvantages

Advantages

  • Simplifies I/O expansion of microcontrollers
  • Low standby current
  • Wide operating voltage range

Disadvantages

  • Limited number of I/Os (8)

Working Principles

The PCA9538PW operates by communicating with the microcontroller through the I2C-bus interface, allowing the microcontroller to control the I/Os and monitor the interrupt output.

Detailed Application Field Plans

The PCA9538PW finds applications in various fields such as: - Industrial automation - Consumer electronics - Automotive - Internet of Things (IoT) devices

Detailed and Complete Alternative Models

Some alternative models to PCA9538PW include: - PCA9554PW: 8-bit I2C-bus and SMBus I/O port with interrupt - MCP23008: 8-bit I/O expander with serial interface

In conclusion, the PCA9538PW offers a convenient solution for expanding the I/O capabilities of microcontrollers, making it suitable for a wide range of applications across different industries.

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Перечислите 10 распространенных вопросов и ответов, связанных с применением PCA9538PW в технических решениях.

  1. What is PCA9538PW?

    • PCA9538PW is an 8-bit I2C-bus and SMBus I/O expander designed for 2.3 V to 5.5 V VCC operation.

  2. What are the key features of PCA9538PW?

    • The key features include 5V tolerant I/Os, open-drain outputs, and a hardware address pin for using up to 4 devices on the same bus.

  3. How many I/O pins does PCA9538PW have?

    • PCA9538PW has 8 I/O pins.

  4. What is the maximum frequency supported by PCA9538PW?

    • The maximum frequency supported by PCA9538PW is 400 kHz.

  5. Can PCA9538PW be used in automotive applications?

    • Yes, PCA9538PW is suitable for automotive applications due to its wide operating voltage range.

  6. What are the typical applications of PCA9538PW?

    • Typical applications include driving LEDs and providing digital I/O expansion for microcontroller systems.

  7. Does PCA9538PW support hot insertion?

    • Yes, PCA9538PW supports hot insertion.

  8. What is the power supply range for PCA9538PW?

    • The power supply range for PCA9538PW is 2.3 V to 5.5 V.

  9. Is PCA9538PW compatible with both I2C and SMBus interfaces?

    • Yes, PCA9538PW is compatible with both I2C and SMBus interfaces.

  10. What are the available package options for PCA9538PW?

    • PCA9538PW is available in TSSOP and SO packages.