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PCF8574DWR The Texas Instruments PCF8574DWR is an 8-bit I2C IO expander designed for general-purpose remote I/O expansion. It operates with a voltage range of 2.5V to 6V and features an interrupt output.
Mfr Part #:

PCF8574DWR

Available from 6 distributors
Mfr Name: Texas Instruments
Texas Instruments
The Texas Instruments PCF8574DWR is an 8-bit I2C IO expander designed for general-purpose remote I/O expansion. It operates with a voltage range of 2.5V to 6V and features an interrupt output.
✓ Total Stock: 9,711 pcs
$ Price Range: $0.73

PCF8574DWR Available from 6 distributors

✓ Authorised
✓ Non-Authorised
DistyParts aggregates offers from multiple distributors. Final prices, lead times and terms are subject to the distributors' discretion and may change without prior notice. DistyParts is not liable for any discrepancies.

PCF8574DWR Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
AEC Qualified
Automotive Grade
Clock Frequency
Current
Features
Industrial Grade
Interface
Interrupt Output
Medical Grade
Military Grade
Mounting Type
Number of I
Operating Temperature
Output Type
Supplier Device Package
Supplier Package
Voltage
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PCF8574DWR Description

Short technical summary and product information.

The PCF8574DWR from Texas Instruments is an 8-bit input/output (I/O) expander that utilizes the I2C interface for communication. This device is designed for 2.5V to 6V VCC operation, making it compatible with a wide range of microcontrollers. It provides general-purpose remote I/O expansion through the serial clock (SCL) and serial data (SDA) lines.

 

The expander features an 8-bit quasi-bidirectional I/O port (P0–P7) with latched outputs capable of directly driving LEDs. Each I/O can function as either an input or an output without requiring a separate data-direction control signal. At power-on, the I/Os are set to a high state, with only a current source to VCC active.

 

Key electrical specifications include a maximum clock frequency of 100 kHz and an operating temperature range of -40°C to 85°C. The device supports an interrupt output and offers current capabilities of 1mA and 25mA. It is supplied in a 16-SOIC package suitable for surface mounting.

 

This I/O expander is well-suited for applications requiring additional digital I/O pins, such as controlling LEDs, reading button states, or interfacing with sensors in embedded systems. Its I2C interface simplifies communication with microcontrollers, reducing pin count and complexity.

PCF8574DWR Quick Information

Product Type: IO Expander
Canonical Name: PCF8574DWR I2C/SMBus 8-bit I/O Expander
Subcategory: General Purpose I/O

PCF8574DWR Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

PCF8574DWR Estimated Pricing

Qty Low High
1+ $0.73 $0.73

Estimated market price range - modelled values for guidance only, not live distributor offers.

PCF8574DWR Features

  • Provides 8 bits of general-purpose I/O.
  • Operates via the I2C interface.
  • Supports a voltage range of 2.5V to 6V.
  • Features an interrupt output pin.
  • Available in a 16-SOIC surface mount package.

PCF8574DWR Applications

  • Extends microcontroller I/O capabilities.
  • Ideal for driving multiple LEDs.
  • Suitable for reading button inputs.
  • Used in embedded system designs.

PCF8574DWR FAQs

5 frequently asked questions generated from this part’s specifications.
What is the operating voltage range for the PCF8574DWR?

The operating voltage range is 2.5V to 6V.

What is the maximum clock frequency for the PCF8574DWR?

The maximum clock frequency is 100 kHz.

Does the PCF8574DWR have an interrupt output?

Yes, the PCF8574DWR features an interrupt output.

What package type is the PCF8574DWR supplied in?

The PCF8574DWR is supplied in a 16-SOIC package.

What is the operating temperature range for the PCF8574DWR?

The operating temperature range is -40°C to 85°C.

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