PCF8574P

Remote 8-bit I/O expander for I2C-bus


Quick ordering

DistributorIn Stock
OR:  

The PCF8574 is a silicon CMOS circuit. It provides general purpose remote I/O expansion for most microcontroller families via the two-line bidirectional bus (I²C-bus).

The device consists of an 8-bit quasi-bidirectional port and an I²C-bus interface. The PCF8574 has a low current consumption and includes latched outputs with high current drive capability for directly driving LEDs. It also possesses an interrupt line (INT) which can be connected to the interrupt logic of the microcontroller. By sending an interrupt signal on this line, the remote I/O can inform the microcontroller if there is incoming data on its ports without having to communicate via the I²C-bus. This means that the PCF8574 can remain a simple slave device.

The PCF8574 and PCF8574A versions differ only in their slave address as shown in Fig.10.

Features and benefits

  • Operating supply voltage 2.5 to 6 V
  • Low standby current consumption of 10 uA maximum
  • I²C-bus to parallel port expander
  • Open-drain interrupt output
  • 8-bit remote I/O port for the I²C-bus
  • Compatible with most microcontrollers
  • Latched outputs with high current drive capability for directly driving LEDs
  • Address by 3 hardware address pins for use of up to 8 devices (up to 16 with PCF8574A)
  • DIP16, or space-saving SO16 or SSOP20 packages.
All information on this product information page is subject to the subsequent disclaimers:
Go to the parametric search
Parametric search

Show functional diagram

Block diagram: PCF8574AP, PCF8574AT, PCF8574ATS, PCF8574P, PCF8574T, PCF8574TS
Block diagram: PCF8574AP, PCF8574AT, PCF8574ATS, PCF8574P, PCF8574T, PCF8574TS

Parametrics of this product

Type numberPackageNumber of bitsSource Current per bit(mA)I2C-bus(kHz)Operating voltage(VDC)Weak Pull-Up Current SourceMax Sink Current per bit(mA)# of AddressesMax Sink Current, per package(mA)EnableOperating Temperature(Cel)
PCF8574PSOT38-4
(DIP16)		801002.5~6.0yes208100-40~85-40~85

Package

Type numberOrderable part numberOrdering code (12NC)Product statusPackagePackingMarking
PCF8574PPCF8574P,1129337 060 60112Volume productionSOT38-4
(DIP16) 		Bulk PackPCF8574P

Outline drawing

Package VersionPackage NamePackage DescriptionReference CodesIssue Date
SOT38-4DIP16plastic dual in-line package; 16 leads (300 mil)2003-02-13

Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHSLeadfree conversion dateRHFIFR (FIT)MTBF (hours)MSLMSL LF
PCF8574PPCF8574P,112PCF8574PAlways Pb-free
Quality and reliability disclaimer

Quality and reliability disclaimer

Important Legal Notice on the product/generic quality information, No Warranty

NXP Semiconductors is providing this data for your convenience only. Please note however that NO WARRANTY, REPRESENTATION, GUARANTEE OR LEGALLY BINDING PRODUCT DESCRIPTION is provided by publishing this informational data, nor does NXP Semiconductors acknowledge or accept any liability related thereto. The documentation and data on NXP Semiconductors products can be found in the data sheets as officially published by NXP Semiconductors. For all purchase of products from NXP Semiconductors the NXP Semiconductors' General Terms and Conditions of Commercial Sale will apply.

NXP SEMICONDUCTORS PROVIDES THE DATA HEREUNDER “AS IS” WITHOUT WARRANTY WHATSOEVER. NXP SEMICONDUCTORS DOES NOT WARRANT OR REPRESENT THAT ANY DATA PROVIDED ON THIS WEBSITE IS CORRECT OR FIT FOR A PARTICULAR PURPOSE WHATSOEVER. IT IS PROVIDED WITHOUT ANY WARRANTY WHATSOEVER, WHETHER EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY, COMPLETENESS NONINFRINGEMENT OF INTELLECTUAL PROPERTY OR OTHERWISE AND MAY BE CHANGED, MODIFIED OR DELETED BY NXP SEMICONDUCTORS AT ANY TIME.

Any use of the data provided hereunder is at your own risk.

IN NO EVENT SHALL NXP SEMICONDUCTORS, BE LIABLE FOR ANY DIRECT, SPECIAL, INDIRECT, CONSEQUENTIAL, PUNITIVE, OR INCIDENTAL DAMAGES (INCLUDING WITHOUT LIMITATION DAMAGES FOR LOSS OF BUSINESS, BUSINESS INTERRUPTION, LOSS OF USE, LOSS OF DATA OR INFORMATION, AND THE LIKE) ARISING OUT OF THE USE OF THE DATA, WHETHER OR NOT BASED ON TORT (INCLUDING NEGLIGENCE), STRICT LIABILITY, BREACH OF CONTRACT, BREACH OF WARRANTY OR ANY OTHER THEORY, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. NOTWITHSTANDING ANY DAMAGES THAT YOU MIGHT INCUR FOR ANY REASON WHATSOEVER (INCLUDING, WITHOUT LIMITATION, ALL DAMAGES REFERENCED ABOVE AND ALL GENERAL DAMAGES), THE ENTIRE LIABILITY OF NXP SEMICONDUCTORS, AND YOUR EXCLUSIVE REMEDY FOR ALL OF THE FOREGOING SHALL BE LIMITED TO ACTUAL DAMAGES INCURRED BY YOU BASED ON REASONABLE RELIANCE UP TO ONE DOLLARS (US$1.00). THE FOREGOING LIMITATIONS, EXCLUSIONS AND DISCLAIMERS SHALL APPLY TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, EVEN IF ANY REMEDY FAILS OF ITS ESSENTIAL PURPOSE.

Your use of this data, and all consequences of such use, is solely your responsibility. You must perform sufficient engineering and additional qualification testing in order to properly evaluate your application and determine whether a candidate NXP Semiconductors device is suitable for use in that application.

NXP Semiconductors' products are specifically designed and manufactured to be used within the electrical, thermal, mechanical and other parameters set forth in NXP Semiconductors' data sheets. Quality and reliability data provided by NXP Semiconductors, such as MTBF, MSL and FIT, is intended to be a non-binding estimate of product performance based upon diffusion process, history only. It does not imply that any performance levels reflected in such data can be met if the product is operated outside the conditions expressly stated in the latest published data sheet for a device or in your application.

The RoHS data provided hereunder is preliminary and non binding for NXP Semiconductors. NXP Semiconductors does not accept any liability related to this data.

NXP Semiconductors products are not designed, authorized or warranted to be suitable for use in medical, military, aircraft, space or life support equipment, nor in applications where failure or malfunction of an NXP Semiconductors product can reasonably be expected to result in personal injury, death or severe property or environmental damage nor for any other use that is not explicitly agreed between the parties. NXP Semiconductors accepts no liability for inclusion and/or use of NXP Semiconductors products in such equipment or applications and therefore such inclusion and/or use is at the customer's own risk.

Any use of NXP Semiconductors' products beyond the scope defined in the current NXP Semiconductors' data sheet voids all warranty responsibility of NXP Semiconductors with respect to such devices, and also voids all responsibility of NXP Semiconductors with respect to any applications assistance, product design, software performance or services of any kind that were or may have been performed in connection with the sale of any such devices.

Further, resale of NXP Semiconductors' products or services with statements different from or beyond the parameters stated by NXP Semiconductors for that product in official NXP Semiconductors data sheets, or without the warnings or instructions provided by NXP Semiconductors, voids all express and any implied warranties for the associated NXP Semiconductors product or service, and is an unfair and deceptive business practice.

Documentation for this product

File nameTitleTypeFormatDate
PCF8574Remote 8-bit I/O expander for I2C-busData sheetpdf2002-11-22
AN10441Level shifting techniques in I2C-bus designApplication notepdf2007-06-20
AN256PCA9500/PCA9501 provides simple card maintenance and control using I²C-busApplication notepdf2009-03-23
AN469I2C/SMBus general purpose I/O expandersApplication notepdf2005-01-20
AN10216I2C manualApplication notepdf2003-03-27
AN96007P83CE258 for High-End RDS/EON Car Radio System CCR520S V2.5Application notepdf1996-02-01
AN10369UART/SPI/I2C code examplesApplication notepdf2005-04-12
AN96029High-end RDS/EON car radio system CCR612 user manualApplication notepdf2003-03-14
75016543Create smarter, more efficient white goods; An industry-leading portfolio of cost-effective, power-saving solutions for major home appliancesBrochurepdf2008-06-01
75016020Low-power GPIO expanders for portable applications; NXP 8/16-bit I2C/SMBus GPIO expanders PCA9534/35/35C for low-power applicationsLeafletpdf2007-06-01
75016535Versatile, easy-to-use GPIO expanders; NXP 4/8/16-bit I2C/SMBus GPIO expanders PCA9536/54/54A/55Leafletpdf2008-08-01
75016018Combination GPIO expanders and EEPROMs for smaller boards; NXP 8-bit I2C/SMBus GPIO expanders with 2-K EEPROM PCA9500/01Leafletpdf2007-06-01
75017144I2C Selection Guide 2H 2011Leafletpdf2011-09-29
design_con_2003_tecforum_i2c_bus_overviewDesignCon 2003 TecForum I 2 C Bus OverviewOther typepdf2003-01-27
UM10204I2C-bus specification and user manualUser manualpdf2007-06-26
UM10206I2C Demonstration Board 2005-1 Quick Start GuideUser manualpdf2006-06-13
UM10267PCA9698 demonstration board OM6281User manualpdf2008-09-26
UM10204_JAI2C-bus specification and user manualUser manualpdf2013-04-03

Ordering & availability

Type numberOrdering code (12NC)Orderable part numberRegionDistributorIn stockOrder quantityInventory dateBuy onlineSamples
PCF8574P9337 060 60112PCF8574P,112NAFUTURE ELECTRONICS20,9745/20/2013Buy online 
   EUFUTURE ELECTRONICS UK20,9745/20/2013Buy online 
   ASIAFUTURE ELECTRONICS- ASIA20,9745/20/2013Buy online 
   EUAVNET EXPRESS EUROPE18,8005/21/2013Buy online 
   ASIAWPI4,575100005/21/2013Buy online 
   NAARROW ELECTRONICS4,4125/21/2013Buy online 
   EUARROW EUROPE4,3505/21/2013Buy online 
   NADIGI-KEY CORPORATION1,7665/21/2013Buy online 
   NAMOUSER ELECTRONICS1,6065/21/2013Buy online 
   NAAVNET EXPRESS AMERICAS1,5525/21/2013Buy online 
   EUFarnell Europe1,467105/21/2013Buy online 
   NANewark element141,18815/21/2013Buy online 
   NAWPG AMERICAS INC.1,0005/21/2013Buy online 
   NANEWARK/ELEMENT147915/21/2013Buy online 
   ASIAElement 14189121/05/2013Buy online 
   JAPANCHIP ONE STOP605/21/2013Buy online 

Sample

Sample orders normally take 2-4 days for delivery.
If you do not have a direct account with NXP our network of global and regional distributors is available and equipped to support you with NXP samples. As a NXP customer you also have the option to order samples via our sales organisation.

Technical support

Do you want to ask technical questions to an NXP expert?
Please select one of the following options:

How to search?

Restricted Document

You are accessing a password protected document.
Please choose an option below

Fill in your name, company and e-mail address and you will receive an e-mail with a username and password for this restricted document.

First name*

Last name*

Company*

E-mail*

Comments

* required.

Print password request form:

Before we can grant you access to our confidential documents you are required to fill in, print and sign the password request form by which you comply with the NXP Non-disclosure agreement (NDA). Please email or fax the signed form to the email-address or fax-number specified on the form. After approval you will receive username and password via email. In case you already signed an NDA with NXP and already have username and password, you can skip this step.

Open document:

If you have received the username and password, you can open the document by clicking on the "open document" link. You will be prompted for username and password. After you fill in the username and password the download will start.

Forgot your password:

In case you forgot your password you can click on the "forgot your password" link to retrieve your password. Please complete the small form with your personal details and your request will be sent to NXP. You will receive an answer with your password shortly.

Request secure documentation

Fill in your name, company and e-mail address and you will receive an e-mail with a username and password for this secure document.

First name*

Last name*

Company*

E-mail*

Comments

* required.

Datasheet confidential

Fill in your details and you will be contacted

First name*

Last name*

Company*

Country*

Telephone number*

E-mail*

* required.

Your e-mail address will only be used to send the datasheet and will not be used for any other purposes.

No full datasheet available

Fill in your details to receive notification when the datasheet becomes available

First name*

Last name*

Company*

E-mail*

* required.

Your email address will only be used to send the datasheet and will not be used for any other purposes.