Texas Instruments
图片可能具有代表性。
产品详情请参阅规格.
PCA9557DB
查看详情 数据表

PCA9557DB

Product Overview

Category: Integrated Circuit
Use: I/O Expander
Characteristics: 8-bit I2C and SMBus I/O port with interrupt
Package: SSOP, TSSOP, and DHVQFN
Essence: Provides remote I/O expansion for most microcontroller families via the I2C interface
Packaging/Quantity: Tape and Reel (2500 units per reel)

Specifications

  • Voltage Supply: 2.3V to 5.5V
  • Current Supply: 1.6mA
  • Operating Temperature: -40°C to 85°C
  • I/O Compatibility: 5V tolerant I/O ports

Detailed Pin Configuration

  1. P00
  2. P01
  3. P02
  4. P03
  5. P04
  6. P05
  7. P06
  8. P07
  9. INT
  10. SDA
  11. SCL
  12. GND
  13. VCC

Functional Features

  • 8-bit remote I/O expander for I2C-bus/SMBus applications
  • Open-drain interrupt output
  • Low standby current
  • Compatible with most microcontrollers

Advantages and Disadvantages

Advantages: - Simplifies I/O expansion of microcontrollers - Low power consumption - Wide voltage supply range

Disadvantages: - Limited number of I/O ports - Requires I2C interface support from the microcontroller

Working Principles

The PCA9557DB is an 8-bit I/O expander that provides remote I/O expansion for most microcontroller families through the I2C interface. It allows the microcontroller to control up to 8 separate I/O ports while using only two pins on the microcontroller.

Detailed Application Field Plans

  1. Home Automation Systems
  2. Industrial Control Systems
  3. IoT Devices
  4. Consumer Electronics
  5. Automotive Applications

Detailed and Complete Alternative Models

  1. MCP23008
  2. PCF8574
  3. MAX7311
  4. SX1509

This concludes the entry for PCA9557DB in the English editing encyclopedia format.

10个与PCA9557DB在技术解决方案中的应用相关的常见问题及解答

  1. What is PCA9557DB?

    • PCA9557DB is an I2C-bus controlled 8-bit I/O expander for open-drain outputs, designed to provide general-purpose remote I/O expansion for most microcontroller families via the I2C interface.

  2. What is the supply voltage range for PCA9557DB?

    • The supply voltage range for PCA9557DB is 2.3V to 5.5V.

  3. How many I/O pins does PCA9557DB have?

    • PCA9557DB has 8 I/O pins.

  4. What is the maximum sink current per I/O pin for PCA9557DB?

    • The maximum sink current per I/O pin for PCA9557DB is 25mA.

  5. Can PCA9557DB be used for LED dimming applications?

    • Yes, PCA9557DB can be used for LED dimming applications as it supports PWM control.

  6. Is PCA9557DB suitable for battery-powered applications?

    • Yes, PCA9557DB is suitable for battery-powered applications due to its low standby current consumption.

  7. What is the I2C address range for PCA9557DB?

    • The I2C address range for PCA9557DB is 0x20 to 0x27.

  8. Does PCA9557DB support hardware addressing?

    • Yes, PCA9557DB supports hardware addressing through its A0, A1, and A2 pins.

  9. Can PCA9557DB be cascaded with other I2C devices?

    • Yes, PCA9557DB can be cascaded with other I2C devices as it supports the I2C-bus interface.

  10. What are some common applications of PCA9557DB?

    • Common applications of PCA9557DB include LED dimming, push-button inputs, relay drivers, and general-purpose I/O expansion in various technical solutions.