PCF8574ADW
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Texas Instruments PCF8574ADW

Manufacturer No:
PCF8574ADW
Manufacturer:
Texas Instruments
Package:
Bulk
Description:
IC I/O EXPANDER I2C 8B 16SOIC
Delivery:
Payment:
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Product Introduction

Overview

The PCF8574ADW is an 8-bit I/O expander produced by Texas Instruments, designed to provide remote I/O expansion for most microcontroller families via the I2C-bus interface. This product is part of the PCF8574 series, which is widely used in applications requiring additional I/O ports. The PCF8574ADW is particularly suitable for industrial control, consumer electronics, and automotive applications due to its robust design and ease of integration.

Its market positioning targets engineers and designers looking for cost-effective and reliable I/O expansion solutions. The PCF8574ADW stands out for its low standby current consumption, wide operating voltage range, and compatibility with a broad range of microcontrollers, making it a competitive choice in the market.

Key Specifications

ParameterValueUnitNotes
Supply Voltage2.5 to 6V
Operating Temperature-40 to 85°C
I2C-bus Frequency0 to 400kHz
I/O Ports8Quasi-bidirectional
Standby Current2.5µATypical
PackageSOIC-16
Interrupt OutputYesOpen-drain
ESD Protection±2000VHBM

Key Features

  • Remote 8-bit I/O expansion via I2C-bus interface.
  • Low standby current consumption for energy-efficient designs.
  • Wide operating voltage range (2.5V to 6V) for versatile applications.
  • Quasi-bidirectional I/O ports for simplified interfacing.
  • Interrupt output for efficient event-driven system design.
  • Robust ESD protection ensures reliability in harsh environments.

Applications

The PCF8574ADW is widely used in various fields, including:

  • Industrial Automation: Used for controlling sensors, actuators, and displays in automated systems.
  • Consumer Electronics: Ideal for expanding I/O capabilities in devices like smart home appliances and entertainment systems.
  • Automotive Electronics: Suitable for dashboard controls, lighting systems, and other in-vehicle applications.
  • Embedded Systems: Provides additional I/O ports for microcontrollers in compact designs.

Q & A

1. What is the operating voltage range of the PCF8574ADW?

The PCF8574ADW operates within a voltage range of 2.5V to 6V.

2. How many I/O ports does the PCF8574ADW provide?

It provides 8 quasi-bidirectional I/O ports.

3. Is the PCF8574ADW compatible with 3.3V microcontrollers?

Yes, it is compatible with 3.3V microcontrollers due to its wide operating voltage range.

4. Does the PCF8574ADW support interrupt functionality?

Yes, it features an open-drain interrupt output for efficient event handling.

5. What is the maximum I2C-bus frequency supported?

It supports I2C-bus frequencies up to 400 kHz.

6. Can the PCF8574ADW be used in automotive applications?

Yes, it is suitable for automotive electronics due to its robust design and ESD protection.

7. What is the standby current consumption of the PCF8574ADW?

The typical standby current consumption is 2.5 µA.

8. What package does the PCF8574ADW come in?

It is available in an SOIC-16 package.

9. Is the PCF8574ADW suitable for industrial control systems?

Yes, it is widely used in industrial automation for controlling sensors and actuators.

10. Does the PCF8574ADW require external pull-up resistors for I2C communication?

Yes, external pull-up resistors are required for the SDA and SCL lines in I2C communication.

Product Attributes

Number of I/O:8
Interface:I²C
Interrupt Output:Yes
Features:POR
Output Type:Push-Pull
Current - Output Source/Sink:1mA, 25mA
Clock Frequency:100 kHz
Voltage - Supply:2.5V ~ 6V
Operating Temperature:-40°C ~ 85°C
Mounting Type:Surface Mount
Package / Case:16-SOIC (0.295", 7.50mm Width)
Supplier Device Package:16-SOIC
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Similar Products

Part Number PCF8574ADW PCF8574DW PCF8574ADWR PCF8574APW
Manufacturer Texas Instruments Texas Instruments Texas Instruments Texas Instruments
Product Status Active Active Active Active
Number of I/O 8 8 8 8
Interface I²C I²C I²C I²C
Interrupt Output Yes Yes Yes Yes
Features POR POR POR POR
Output Type Push-Pull Push-Pull Push-Pull Push-Pull
Current - Output Source/Sink 1mA, 25mA 1mA, 25mA 1mA, 25mA 1mA, 25mA
Clock Frequency 100 kHz 100 kHz 100 kHz 100 kHz
Voltage - Supply 2.5V ~ 6V 2.5V ~ 6V 2.5V ~ 6V 2.5V ~ 6V
Operating Temperature -40°C ~ 85°C -40°C ~ 85°C -40°C ~ 85°C -40°C ~ 85°C
Mounting Type Surface Mount Surface Mount Surface Mount Surface Mount
Package / Case 16-SOIC (0.295", 7.50mm Width) 16-SOIC (0.295", 7.50mm Width) 16-SOIC (0.295", 7.50mm Width) 20-TSSOP (0.173", 4.40mm Width)
Supplier Device Package 16-SOIC 16-SOIC 16-SOIC 20-TSSOP

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