PCA9561

Quad 6-bit multiplexed I²C-bus EEPROM DIP switch


Quick ordering

DistributorIn Stock
OR:  

The PCA9561 is a 20-pin CMOS device consisting of four 6-bit non-volatile EEPROM registers, six hardware pin inputs and a 6-bit multiplexed output. It is used for DIP switch-free or jumper-less system configuration and supports Mobile and Desktop VID Configuration, where five preset values (four sets of internal non-volatile registers and one set of external hardware pins) set processor voltage for operation in various performance or battery conservation sleep modes. The PCA9561 is also useful in server and telecommunications/networking applications when used to replace DIP switches or jumpers, since the settings can be easily changed via I²C-bus/SMBus without having to power down the equipment to open the cabinet. The non-volatile memory retains the most current setting selected before the power is turned off.

The PCA9561 typically resides between the CPU and Voltage Regulator Module (VRM) when used for CPU VID (Voltage IDentification code) configuration. It is used to bypass the CPU-defined VID values and provide a different set of VID values to the VRM, if an increase in the CPU voltage is desired. An increase in CPU voltage combined with an increase in CPU frequency leads to a performance boost of up to 7.5 %. Lower CPU voltage reduces power consumption. The main advantage of the PCA9561 over older devices, such as the PCA9559 or PCA9560, is that it contains four internal non-volatile EEPROM registers instead of just one or two, allowing five independent settings which allows a more accurate CPU voltage tuning depending on specific applications.

The PCA9561 has two address pins, allowing up to four devices to be placed on the same I²C-bus or SMBus.

Features and benefits

  • Selection of non-volatile register_n as source to MUX_OUT pins via I²C-bus
  • I²C-bus can override MUX_SELECT pin in selecting output source
  • 6-bit 5-to-1 multiplexer DIP switch
  • Four internal non-volatile registers
  • Internal non-volatile registers programmable and readable via I²C-bus
  • Six open-drain multiplexed outputs
  • 400 kHz maximum clock frequency
  • Operating supply voltage 3.0 V to 3.6 V
  • 5 V and 2.5 V tolerant inputs/outputs
  • Useful for Speed Step configuration of laptop computer
  • Two address pins, allowing up to four devices on the I²C-bus
  • MUX_IN values readable via I²C-bus
  • ESD protection exceeds 200 V HBM per JESD22-A114 and 1000 V CDM per JESD22-C101
  • Latch-up testing is done to JESDEC Standard JESD78 which exceeds 100 mA

Show functional diagram

Block diagram: PCA9561D, PCA9561PW
Block diagram: PCA9561D, PCA9561PW

Parametrics of this product

Type numberPackageI2C-bus(kHz)Operating voltage(VDC)# of Outputs/Latched Outputs/Internal EEPROM RegistersMax Sink Current per bit(mA)# of AddressesMax Sink Current, per package(mA)Operating Temperature(Cel)
PCA9561PWSOT360-1
(TSSOP20)		4003.0~3.66?0?22541000~70

Package

Type numberOrderable part numberOrdering code (12NC)Product statusPackagePackingMarking
PCA9561PWPCA9561PW,1129352 717 09112Volume productionSOT360-1
(TSSOP20) 		TubeStandard Marking
PCA9561PWPCA9561PW,1189352 717 09118Volume productionSOT360-1
(TSSOP20) 		Reel Pack, SMD, 13"Standard Marking

Outline drawing

Package VersionPackage NamePackage DescriptionReference CodesIssue Date
SOT360-1TSSOP20plastic thin shrink small outline package; 20 leads; body width 4.4 mmMO-153 (JEDEC); 2003-02-19

Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHSLeadfree conversion dateRHFIFR (FIT)MTBF (hours)MSLMSL LF
PCA9561PWPCA9561PW,112PCA9561PWweek 12, 20052.05.0E811
PCA9561PWPCA9561PW,118PCA9561PWweek 12, 20052.05.0E811
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
PCA9561Quad 6-bit multiplexed I2C-bus EEPROM DIP switchData sheetpdf2012-11-06
AN10441Level shifting techniques in I2C-bus designApplication notepdf2007-06-20
AN10216I2C manualApplication notepdf2003-03-27
AN10146I2C 2002-1A Evaluation BoardApplication notepdf2003-02-26
AN250PCA8550 4-bit multiplexed/1-bit latched 5-bit I2C EEPROMApplication notepdf1998-10-01
75016531Evaluate the I2C-bus with a comprehensive kit; NXP I2C 2002-1A evaluation board kits OM6285 and OM6278Leafletpdf2008-07-01
75017424NXP I2C-bus solutions 2013: Smart, simple solutions for the 12 most common design concernsLeafletpdf2013-05-23
design_con_2003_tecforum_i2c_bus_overviewDesignCon 2003 TecForum I 2 C Bus OverviewOther typepdf2003-01-27
UM10204_v5I2C-bus specification and user manualOther typepdf2013-06-03
UM10204I2C-bus specification and user manualUser manualpdf2007-06-26
UM10206I2C Demonstration Board 2005-1 Quick Start GuideUser manualpdf2006-06-13

Ordering & availability

Type numberOrdering code (12NC)Orderable part numberRegionDistributorIn stockOrder quantityInventory dateBuy onlineSamples
PCA9561PW9352 717 09112PCA9561PW,112EUAVNET EXPRESS EUROPE1,0506/19/2013Buy onlineNot available
   EUARROW EUROPE2256/19/2013Buy online 
PCA9561PW9352 717 09118PCA9561PW,118NAMOUSER ELECTRONICS2,5006/19/2013Buy online 
   JAPANCHIP ONE STOP3006/20/2013Buy 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?

Already registered to MyNXP? or Register

Feedback

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.